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| <pre><span class="source-line-no">001</span><span id="line-1">/*</span> |
| <span class="source-line-no">002</span><span id="line-2"> * Licensed to the Apache Software Foundation (ASF) under one</span> |
| <span class="source-line-no">003</span><span id="line-3"> * or more contributor license agreements. See the NOTICE file</span> |
| <span class="source-line-no">004</span><span id="line-4"> * distributed with this work for additional information</span> |
| <span class="source-line-no">005</span><span id="line-5"> * regarding copyright ownership. The ASF licenses this file</span> |
| <span class="source-line-no">006</span><span id="line-6"> * to you under the Apache License, Version 2.0 (the</span> |
| <span class="source-line-no">007</span><span id="line-7"> * "License"); you may not use this file except in compliance</span> |
| <span class="source-line-no">008</span><span id="line-8"> * with the License. You may obtain a copy of the License at</span> |
| <span class="source-line-no">009</span><span id="line-9"> *</span> |
| <span class="source-line-no">010</span><span id="line-10"> * http://www.apache.org/licenses/LICENSE-2.0</span> |
| <span class="source-line-no">011</span><span id="line-11"> *</span> |
| <span class="source-line-no">012</span><span id="line-12"> * Unless required by applicable law or agreed to in writing, software</span> |
| <span class="source-line-no">013</span><span id="line-13"> * distributed under the License is distributed on an "AS IS" BASIS,</span> |
| <span class="source-line-no">014</span><span id="line-14"> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</span> |
| <span class="source-line-no">015</span><span id="line-15"> * See the License for the specific language governing permissions and</span> |
| <span class="source-line-no">016</span><span id="line-16"> * limitations under the License.</span> |
| <span class="source-line-no">017</span><span id="line-17"> */</span> |
| <span class="source-line-no">018</span><span id="line-18">package org.apache.hadoop.hbase.io.hfile;</span> |
| <span class="source-line-no">019</span><span id="line-19"></span> |
| <span class="source-line-no">020</span><span id="line-20">import static java.util.Objects.requireNonNull;</span> |
| <span class="source-line-no">021</span><span id="line-21"></span> |
| <span class="source-line-no">022</span><span id="line-22">import java.lang.ref.WeakReference;</span> |
| <span class="source-line-no">023</span><span id="line-23">import java.util.EnumMap;</span> |
| <span class="source-line-no">024</span><span id="line-24">import java.util.Iterator;</span> |
| <span class="source-line-no">025</span><span id="line-25">import java.util.List;</span> |
| <span class="source-line-no">026</span><span id="line-26">import java.util.Map;</span> |
| <span class="source-line-no">027</span><span id="line-27">import java.util.PriorityQueue;</span> |
| <span class="source-line-no">028</span><span id="line-28">import java.util.concurrent.ConcurrentHashMap;</span> |
| <span class="source-line-no">029</span><span id="line-29">import java.util.concurrent.Executors;</span> |
| <span class="source-line-no">030</span><span id="line-30">import java.util.concurrent.ScheduledExecutorService;</span> |
| <span class="source-line-no">031</span><span id="line-31">import java.util.concurrent.TimeUnit;</span> |
| <span class="source-line-no">032</span><span id="line-32">import java.util.concurrent.atomic.AtomicLong;</span> |
| <span class="source-line-no">033</span><span id="line-33">import java.util.concurrent.atomic.LongAdder;</span> |
| <span class="source-line-no">034</span><span id="line-34">import java.util.concurrent.locks.ReentrantLock;</span> |
| <span class="source-line-no">035</span><span id="line-35">import org.apache.hadoop.conf.Configuration;</span> |
| <span class="source-line-no">036</span><span id="line-36">import org.apache.hadoop.hbase.io.HeapSize;</span> |
| <span class="source-line-no">037</span><span id="line-37">import org.apache.hadoop.hbase.io.encoding.DataBlockEncoding;</span> |
| <span class="source-line-no">038</span><span id="line-38">import org.apache.hadoop.hbase.util.ClassSize;</span> |
| <span class="source-line-no">039</span><span id="line-39">import org.apache.hadoop.hbase.util.EnvironmentEdgeManager;</span> |
| <span class="source-line-no">040</span><span id="line-40">import org.apache.hadoop.util.StringUtils;</span> |
| <span class="source-line-no">041</span><span id="line-41">import org.apache.yetus.audience.InterfaceAudience;</span> |
| <span class="source-line-no">042</span><span id="line-42">import org.slf4j.Logger;</span> |
| <span class="source-line-no">043</span><span id="line-43">import org.slf4j.LoggerFactory;</span> |
| <span class="source-line-no">044</span><span id="line-44"></span> |
| <span class="source-line-no">045</span><span id="line-45">import org.apache.hbase.thirdparty.com.google.common.base.MoreObjects;</span> |
| <span class="source-line-no">046</span><span id="line-46">import org.apache.hbase.thirdparty.com.google.common.base.Objects;</span> |
| <span class="source-line-no">047</span><span id="line-47">import org.apache.hbase.thirdparty.com.google.common.util.concurrent.ThreadFactoryBuilder;</span> |
| <span class="source-line-no">048</span><span id="line-48"></span> |
| <span class="source-line-no">049</span><span id="line-49">/**</span> |
| <span class="source-line-no">050</span><span id="line-50"> * <b>This realisation improve performance of classical LRU cache up to 3 times via reduce GC</span> |
| <span class="source-line-no">051</span><span id="line-51"> * job.</b></span> |
| <span class="source-line-no">052</span><span id="line-52"> * </p></span> |
| <span class="source-line-no">053</span><span id="line-53"> * The classical block cache implementation that is memory-aware using {@link HeapSize},</span> |
| <span class="source-line-no">054</span><span id="line-54"> * memory-bound using an LRU eviction algorithm, and concurrent: backed by a</span> |
| <span class="source-line-no">055</span><span id="line-55"> * {@link ConcurrentHashMap} and with a non-blocking eviction thread giving constant-time</span> |
| <span class="source-line-no">056</span><span id="line-56"> * {@link #cacheBlock} and {@link #getBlock} operations.</span> |
| <span class="source-line-no">057</span><span id="line-57"> * </p></span> |
| <span class="source-line-no">058</span><span id="line-58"> * Contains three levels of block priority to allow for scan-resistance and in-memory families</span> |
| <span class="source-line-no">059</span><span id="line-59"> * {@link org.apache.hadoop.hbase.client.ColumnFamilyDescriptorBuilder#setInMemory(boolean)} (An</span> |
| <span class="source-line-no">060</span><span id="line-60"> * in-memory column family is a column family that should be served from memory if possible):</span> |
| <span class="source-line-no">061</span><span id="line-61"> * single-access, multiple-accesses, and in-memory priority. A block is added with an in-memory</span> |
| <span class="source-line-no">062</span><span id="line-62"> * priority flag if {@link org.apache.hadoop.hbase.client.ColumnFamilyDescriptor#isInMemory()},</span> |
| <span class="source-line-no">063</span><span id="line-63"> * otherwise a block becomes a single access priority the first time it is read into this block</span> |
| <span class="source-line-no">064</span><span id="line-64"> * cache. If a block is accessed again while in cache, it is marked as a multiple access priority</span> |
| <span class="source-line-no">065</span><span id="line-65"> * block. This delineation of blocks is used to prevent scans from thrashing the cache adding a</span> |
| <span class="source-line-no">066</span><span id="line-66"> * least-frequently-used element to the eviction algorithm.</span> |
| <span class="source-line-no">067</span><span id="line-67"> * <p/></span> |
| <span class="source-line-no">068</span><span id="line-68"> * Each priority is given its own chunk of the total cache to ensure fairness during eviction. Each</span> |
| <span class="source-line-no">069</span><span id="line-69"> * priority will retain close to its maximum size, however, if any priority is not using its entire</span> |
| <span class="source-line-no">070</span><span id="line-70"> * chunk the others are able to grow beyond their chunk size.</span> |
| <span class="source-line-no">071</span><span id="line-71"> * <p/></span> |
| <span class="source-line-no">072</span><span id="line-72"> * Instantiated at a minimum with the total size and average block size. All sizes are in bytes. The</span> |
| <span class="source-line-no">073</span><span id="line-73"> * block size is not especially important as this cache is fully dynamic in its sizing of blocks. It</span> |
| <span class="source-line-no">074</span><span id="line-74"> * is only used for pre-allocating data structures and in initial heap estimation of the map.</span> |
| <span class="source-line-no">075</span><span id="line-75"> * <p/></span> |
| <span class="source-line-no">076</span><span id="line-76"> * The detailed constructor defines the sizes for the three priorities (they should total to the</span> |
| <span class="source-line-no">077</span><span id="line-77"> * <code>maximum size</code> defined). It also sets the levels that trigger and control the eviction</span> |
| <span class="source-line-no">078</span><span id="line-78"> * thread.</span> |
| <span class="source-line-no">079</span><span id="line-79"> * <p/></span> |
| <span class="source-line-no">080</span><span id="line-80"> * The <code>acceptable size</code> is the cache size level which triggers the eviction process to</span> |
| <span class="source-line-no">081</span><span id="line-81"> * start. It evicts enough blocks to get the size below the minimum size specified.</span> |
| <span class="source-line-no">082</span><span id="line-82"> * <p/></span> |
| <span class="source-line-no">083</span><span id="line-83"> * Eviction happens in a separate thread and involves a single full-scan of the map. It determines</span> |
| <span class="source-line-no">084</span><span id="line-84"> * how many bytes must be freed to reach the minimum size, and then while scanning determines the</span> |
| <span class="source-line-no">085</span><span id="line-85"> * fewest least-recently-used blocks necessary from each of the three priorities (would be 3 times</span> |
| <span class="source-line-no">086</span><span id="line-86"> * bytes to free). It then uses the priority chunk sizes to evict fairly according to the relative</span> |
| <span class="source-line-no">087</span><span id="line-87"> * sizes and usage.</span> |
| <span class="source-line-no">088</span><span id="line-88"> * <p/></span> |
| <span class="source-line-no">089</span><span id="line-89"> * Adaptive LRU cache lets speed up performance while we are reading much more data than can fit</span> |
| <span class="source-line-no">090</span><span id="line-90"> * into BlockCache and it is the cause of a high rate of evictions. This in turn leads to heavy</span> |
| <span class="source-line-no">091</span><span id="line-91"> * Garbage Collector works. So a lot of blocks put into BlockCache but never read, but spending a</span> |
| <span class="source-line-no">092</span><span id="line-92"> * lot of CPU resources for cleaning. We could avoid this situation via parameters:</span> |
| <span class="source-line-no">093</span><span id="line-93"> * <p/></span> |
| <span class="source-line-no">094</span><span id="line-94"> * <b>hbase.lru.cache.heavy.eviction.count.limit</b> - set how many times we have to run the</span> |
| <span class="source-line-no">095</span><span id="line-95"> * eviction process that starts to avoid putting data to BlockCache. By default it is 0 and it meats</span> |
| <span class="source-line-no">096</span><span id="line-96"> * the feature will start at the beginning. But if we have some times short reading the same data</span> |
| <span class="source-line-no">097</span><span id="line-97"> * and some times long-term reading - we can divide it by this parameter. For example we know that</span> |
| <span class="source-line-no">098</span><span id="line-98"> * our short reading used to be about 1 minutes, then we have to set the parameter about 10 and it</span> |
| <span class="source-line-no">099</span><span id="line-99"> * will enable the feature only for long time massive reading (after ~100 seconds). So when we use</span> |
| <span class="source-line-no">100</span><span id="line-100"> * short-reading and want all of them in the cache we will have it (except for eviction of course).</span> |
| <span class="source-line-no">101</span><span id="line-101"> * When we use long-term heavy reading the feature will be enabled after some time and bring better</span> |
| <span class="source-line-no">102</span><span id="line-102"> * performance.</span> |
| <span class="source-line-no">103</span><span id="line-103"> * <p/></span> |
| <span class="source-line-no">104</span><span id="line-104"> * <b>hbase.lru.cache.heavy.eviction.mb.size.limit</b> - set how many bytes in 10 seconds desirable</span> |
| <span class="source-line-no">105</span><span id="line-105"> * putting into BlockCache (and evicted from it). The feature will try to reach this value and</span> |
| <span class="source-line-no">106</span><span id="line-106"> * maintain it. Don't try to set it too small because it leads to premature exit from this mode. For</span> |
| <span class="source-line-no">107</span><span id="line-107"> * powerful CPUs (about 20-40 physical cores) it could be about 400-500 MB. Average system (~10</span> |
| <span class="source-line-no">108</span><span id="line-108"> * cores) 200-300 MB. Some weak systems (2-5 cores) may be good with 50-100 MB. How it works: we set</span> |
| <span class="source-line-no">109</span><span id="line-109"> * the limit and after each ~10 second calculate how many bytes were freed. Overhead = Freed Bytes</span> |
| <span class="source-line-no">110</span><span id="line-110"> * Sum (MB) * 100 / Limit (MB) - 100; For example we set the limit = 500 and were evicted 2000 MB.</span> |
| <span class="source-line-no">111</span><span id="line-111"> * Overhead is: 2000 * 100 / 500 - 100 = 300% The feature is going to reduce a percent caching data</span> |
| <span class="source-line-no">112</span><span id="line-112"> * blocks and fit evicted bytes closer to 100% (500 MB). Some kind of an auto-scaling. If freed</span> |
| <span class="source-line-no">113</span><span id="line-113"> * bytes less then the limit we have got negative overhead. For example if were freed 200 MB: 200 *</span> |
| <span class="source-line-no">114</span><span id="line-114"> * 100 / 500 - 100 = -60% The feature will increase the percent of caching blocks. That leads to fit</span> |
| <span class="source-line-no">115</span><span id="line-115"> * evicted bytes closer to 100% (500 MB). The current situation we can find out in the log of</span> |
| <span class="source-line-no">116</span><span id="line-116"> * RegionServer: BlockCache evicted (MB): 0, overhead (%): -100, heavy eviction counter: 0, current</span> |
| <span class="source-line-no">117</span><span id="line-117"> * caching DataBlock (%): 100 - means no eviction, 100% blocks is caching BlockCache evicted (MB):</span> |
| <span class="source-line-no">118</span><span id="line-118"> * 2000, overhead (%): 300, heavy eviction counter: 1, current caching DataBlock (%): 97 - means</span> |
| <span class="source-line-no">119</span><span id="line-119"> * eviction begin, reduce of caching blocks by 3%. It help to tune your system and find out what</span> |
| <span class="source-line-no">120</span><span id="line-120"> * value is better set. Don't try to reach 0% overhead, it is impossible. Quite good 50-100%</span> |
| <span class="source-line-no">121</span><span id="line-121"> * overhead, it prevents premature exit from this mode.</span> |
| <span class="source-line-no">122</span><span id="line-122"> * <p/></span> |
| <span class="source-line-no">123</span><span id="line-123"> * <b>hbase.lru.cache.heavy.eviction.overhead.coefficient</b> - set how fast we want to get the</span> |
| <span class="source-line-no">124</span><span id="line-124"> * result. If we know that our reading is heavy for a long time, we don't want to wait and can</span> |
| <span class="source-line-no">125</span><span id="line-125"> * increase the coefficient and get good performance sooner. But if we aren't sure we can do it</span> |
| <span class="source-line-no">126</span><span id="line-126"> * slowly and it could prevent premature exit from this mode. So, when the coefficient is higher we</span> |
| <span class="source-line-no">127</span><span id="line-127"> * can get better performance when heavy reading is stable. But when reading is changing we can</span> |
| <span class="source-line-no">128</span><span id="line-128"> * adjust to it and set the coefficient to lower value. For example, we set the coefficient = 0.01.</span> |
| <span class="source-line-no">129</span><span id="line-129"> * It means the overhead (see above) will be multiplied by 0.01 and the result is the value of</span> |
| <span class="source-line-no">130</span><span id="line-130"> * reducing percent caching blocks. For example, if the overhead = 300% and the coefficient = 0.01,</span> |
| <span class="source-line-no">131</span><span id="line-131"> * then percent of caching blocks will reduce by 3%. Similar logic when overhead has got negative</span> |
| <span class="source-line-no">132</span><span id="line-132"> * value (overshooting). Maybe it is just short-term fluctuation and we will try to stay in this</span> |
| <span class="source-line-no">133</span><span id="line-133"> * mode. It helps avoid premature exit during short-term fluctuation. Backpressure has simple logic:</span> |
| <span class="source-line-no">134</span><span id="line-134"> * more overshooting - more caching blocks.</span> |
| <span class="source-line-no">135</span><span id="line-135"> * <p/></span> |
| <span class="source-line-no">136</span><span id="line-136"> * Find more information about improvement: https://issues.apache.org/jira/browse/HBASE-23887</span> |
| <span class="source-line-no">137</span><span id="line-137"> */</span> |
| <span class="source-line-no">138</span><span id="line-138">@InterfaceAudience.Private</span> |
| <span class="source-line-no">139</span><span id="line-139">public class LruAdaptiveBlockCache implements FirstLevelBlockCache {</span> |
| <span class="source-line-no">140</span><span id="line-140"></span> |
| <span class="source-line-no">141</span><span id="line-141"> private static final Logger LOG = LoggerFactory.getLogger(LruAdaptiveBlockCache.class);</span> |
| <span class="source-line-no">142</span><span id="line-142"></span> |
| <span class="source-line-no">143</span><span id="line-143"> /**</span> |
| <span class="source-line-no">144</span><span id="line-144"> * Percentage of total size that eviction will evict until; e.g. if set to .8, then we will keep</span> |
| <span class="source-line-no">145</span><span id="line-145"> * evicting during an eviction run till the cache size is down to 80% of the total.</span> |
| <span class="source-line-no">146</span><span id="line-146"> */</span> |
| <span class="source-line-no">147</span><span id="line-147"> private static final String LRU_MIN_FACTOR_CONFIG_NAME = "hbase.lru.blockcache.min.factor";</span> |
| <span class="source-line-no">148</span><span id="line-148"></span> |
| <span class="source-line-no">149</span><span id="line-149"> /**</span> |
| <span class="source-line-no">150</span><span id="line-150"> * Acceptable size of cache (no evictions if size < acceptable)</span> |
| <span class="source-line-no">151</span><span id="line-151"> */</span> |
| <span class="source-line-no">152</span><span id="line-152"> private static final String LRU_ACCEPTABLE_FACTOR_CONFIG_NAME =</span> |
| <span class="source-line-no">153</span><span id="line-153"> "hbase.lru.blockcache.acceptable.factor";</span> |
| <span class="source-line-no">154</span><span id="line-154"></span> |
| <span class="source-line-no">155</span><span id="line-155"> /**</span> |
| <span class="source-line-no">156</span><span id="line-156"> * Hard capacity limit of cache, will reject any put if size > this * acceptable</span> |
| <span class="source-line-no">157</span><span id="line-157"> */</span> |
| <span class="source-line-no">158</span><span id="line-158"> static final String LRU_HARD_CAPACITY_LIMIT_FACTOR_CONFIG_NAME =</span> |
| <span class="source-line-no">159</span><span id="line-159"> "hbase.lru.blockcache.hard.capacity.limit.factor";</span> |
| <span class="source-line-no">160</span><span id="line-160"> private static final String LRU_SINGLE_PERCENTAGE_CONFIG_NAME =</span> |
| <span class="source-line-no">161</span><span id="line-161"> "hbase.lru.blockcache.single.percentage";</span> |
| <span class="source-line-no">162</span><span id="line-162"> private static final String LRU_MULTI_PERCENTAGE_CONFIG_NAME =</span> |
| <span class="source-line-no">163</span><span id="line-163"> "hbase.lru.blockcache.multi.percentage";</span> |
| <span class="source-line-no">164</span><span id="line-164"> private static final String LRU_MEMORY_PERCENTAGE_CONFIG_NAME =</span> |
| <span class="source-line-no">165</span><span id="line-165"> "hbase.lru.blockcache.memory.percentage";</span> |
| <span class="source-line-no">166</span><span id="line-166"></span> |
| <span class="source-line-no">167</span><span id="line-167"> /**</span> |
| <span class="source-line-no">168</span><span id="line-168"> * Configuration key to force data-block always (except in-memory are too much) cached in memory</span> |
| <span class="source-line-no">169</span><span id="line-169"> * for in-memory hfile, unlike inMemory, which is a column-family configuration, inMemoryForceMode</span> |
| <span class="source-line-no">170</span><span id="line-170"> * is a cluster-wide configuration</span> |
| <span class="source-line-no">171</span><span id="line-171"> */</span> |
| <span class="source-line-no">172</span><span id="line-172"> private static final String LRU_IN_MEMORY_FORCE_MODE_CONFIG_NAME =</span> |
| <span class="source-line-no">173</span><span id="line-173"> "hbase.lru.rs.inmemoryforcemode";</span> |
| <span class="source-line-no">174</span><span id="line-174"></span> |
| <span class="source-line-no">175</span><span id="line-175"> /* Default Configuration Parameters */</span> |
| <span class="source-line-no">176</span><span id="line-176"></span> |
| <span class="source-line-no">177</span><span id="line-177"> /* Backing Concurrent Map Configuration */</span> |
| <span class="source-line-no">178</span><span id="line-178"> static final float DEFAULT_LOAD_FACTOR = 0.75f;</span> |
| <span class="source-line-no">179</span><span id="line-179"> static final int DEFAULT_CONCURRENCY_LEVEL = 16;</span> |
| <span class="source-line-no">180</span><span id="line-180"></span> |
| <span class="source-line-no">181</span><span id="line-181"> /* Eviction thresholds */</span> |
| <span class="source-line-no">182</span><span id="line-182"> private static final float DEFAULT_MIN_FACTOR = 0.95f;</span> |
| <span class="source-line-no">183</span><span id="line-183"> static final float DEFAULT_ACCEPTABLE_FACTOR = 0.99f;</span> |
| <span class="source-line-no">184</span><span id="line-184"></span> |
| <span class="source-line-no">185</span><span id="line-185"> /* Priority buckets */</span> |
| <span class="source-line-no">186</span><span id="line-186"> private static final float DEFAULT_SINGLE_FACTOR = 0.25f;</span> |
| <span class="source-line-no">187</span><span id="line-187"> private static final float DEFAULT_MULTI_FACTOR = 0.50f;</span> |
| <span class="source-line-no">188</span><span id="line-188"> private static final float DEFAULT_MEMORY_FACTOR = 0.25f;</span> |
| <span class="source-line-no">189</span><span id="line-189"></span> |
| <span class="source-line-no">190</span><span id="line-190"> private static final float DEFAULT_HARD_CAPACITY_LIMIT_FACTOR = 1.2f;</span> |
| <span class="source-line-no">191</span><span id="line-191"></span> |
| <span class="source-line-no">192</span><span id="line-192"> private static final boolean DEFAULT_IN_MEMORY_FORCE_MODE = false;</span> |
| <span class="source-line-no">193</span><span id="line-193"></span> |
| <span class="source-line-no">194</span><span id="line-194"> /* Statistics thread */</span> |
| <span class="source-line-no">195</span><span id="line-195"> private static final int STAT_THREAD_PERIOD = 60 * 5;</span> |
| <span class="source-line-no">196</span><span id="line-196"> private static final String LRU_MAX_BLOCK_SIZE = "hbase.lru.max.block.size";</span> |
| <span class="source-line-no">197</span><span id="line-197"> private static final long DEFAULT_MAX_BLOCK_SIZE = 16L * 1024L * 1024L;</span> |
| <span class="source-line-no">198</span><span id="line-198"></span> |
| <span class="source-line-no">199</span><span id="line-199"> private static final String LRU_CACHE_HEAVY_EVICTION_COUNT_LIMIT =</span> |
| <span class="source-line-no">200</span><span id="line-200"> "hbase.lru.cache.heavy.eviction.count.limit";</span> |
| <span class="source-line-no">201</span><span id="line-201"> // Default value actually equal to disable feature of increasing performance.</span> |
| <span class="source-line-no">202</span><span id="line-202"> // Because 2147483647 is about ~680 years (after that it will start to work)</span> |
| <span class="source-line-no">203</span><span id="line-203"> // We can set it to 0-10 and get the profit right now.</span> |
| <span class="source-line-no">204</span><span id="line-204"> // (see details https://issues.apache.org/jira/browse/HBASE-23887).</span> |
| <span class="source-line-no">205</span><span id="line-205"> private static final int DEFAULT_LRU_CACHE_HEAVY_EVICTION_COUNT_LIMIT = Integer.MAX_VALUE;</span> |
| <span class="source-line-no">206</span><span id="line-206"></span> |
| <span class="source-line-no">207</span><span id="line-207"> private static final String LRU_CACHE_HEAVY_EVICTION_MB_SIZE_LIMIT =</span> |
| <span class="source-line-no">208</span><span id="line-208"> "hbase.lru.cache.heavy.eviction.mb.size.limit";</span> |
| <span class="source-line-no">209</span><span id="line-209"> private static final long DEFAULT_LRU_CACHE_HEAVY_EVICTION_MB_SIZE_LIMIT = 500;</span> |
| <span class="source-line-no">210</span><span id="line-210"></span> |
| <span class="source-line-no">211</span><span id="line-211"> private static final String LRU_CACHE_HEAVY_EVICTION_OVERHEAD_COEFFICIENT =</span> |
| <span class="source-line-no">212</span><span id="line-212"> "hbase.lru.cache.heavy.eviction.overhead.coefficient";</span> |
| <span class="source-line-no">213</span><span id="line-213"> private static final float DEFAULT_LRU_CACHE_HEAVY_EVICTION_OVERHEAD_COEFFICIENT = 0.01f;</span> |
| <span class="source-line-no">214</span><span id="line-214"></span> |
| <span class="source-line-no">215</span><span id="line-215"> /**</span> |
| <span class="source-line-no">216</span><span id="line-216"> * Defined the cache map as {@link ConcurrentHashMap} here, because in</span> |
| <span class="source-line-no">217</span><span id="line-217"> * {@link LruAdaptiveBlockCache#getBlock}, we need to guarantee the atomicity of</span> |
| <span class="source-line-no">218</span><span id="line-218"> * map#computeIfPresent (key, func). Besides, the func method must execute exactly once only when</span> |
| <span class="source-line-no">219</span><span id="line-219"> * the key is present and under the lock context, otherwise the reference count will be messed up.</span> |
| <span class="source-line-no">220</span><span id="line-220"> * Notice that the {@link java.util.concurrent.ConcurrentSkipListMap} can not guarantee that.</span> |
| <span class="source-line-no">221</span><span id="line-221"> */</span> |
| <span class="source-line-no">222</span><span id="line-222"> private transient final ConcurrentHashMap<BlockCacheKey, LruCachedBlock> map;</span> |
| <span class="source-line-no">223</span><span id="line-223"></span> |
| <span class="source-line-no">224</span><span id="line-224"> /** Eviction lock (locked when eviction in process) */</span> |
| <span class="source-line-no">225</span><span id="line-225"> private transient final ReentrantLock evictionLock = new ReentrantLock(true);</span> |
| <span class="source-line-no">226</span><span id="line-226"></span> |
| <span class="source-line-no">227</span><span id="line-227"> private final long maxBlockSize;</span> |
| <span class="source-line-no">228</span><span id="line-228"></span> |
| <span class="source-line-no">229</span><span id="line-229"> /** Volatile boolean to track if we are in an eviction process or not */</span> |
| <span class="source-line-no">230</span><span id="line-230"> private volatile boolean evictionInProgress = false;</span> |
| <span class="source-line-no">231</span><span id="line-231"></span> |
| <span class="source-line-no">232</span><span id="line-232"> /** Eviction thread */</span> |
| <span class="source-line-no">233</span><span id="line-233"> private transient final EvictionThread evictionThread;</span> |
| <span class="source-line-no">234</span><span id="line-234"></span> |
| <span class="source-line-no">235</span><span id="line-235"> /** Statistics thread schedule pool (for heavy debugging, could remove) */</span> |
| <span class="source-line-no">236</span><span id="line-236"> private transient final ScheduledExecutorService scheduleThreadPool =</span> |
| <span class="source-line-no">237</span><span id="line-237"> Executors.newScheduledThreadPool(1, new ThreadFactoryBuilder()</span> |
| <span class="source-line-no">238</span><span id="line-238"> .setNameFormat("LruAdaptiveBlockCacheStatsExecutor").setDaemon(true).build());</span> |
| <span class="source-line-no">239</span><span id="line-239"></span> |
| <span class="source-line-no">240</span><span id="line-240"> /** Current size of cache */</span> |
| <span class="source-line-no">241</span><span id="line-241"> private final AtomicLong size;</span> |
| <span class="source-line-no">242</span><span id="line-242"></span> |
| <span class="source-line-no">243</span><span id="line-243"> /** Current size of data blocks */</span> |
| <span class="source-line-no">244</span><span id="line-244"> private final LongAdder dataBlockSize;</span> |
| <span class="source-line-no">245</span><span id="line-245"></span> |
| <span class="source-line-no">246</span><span id="line-246"> /** Current number of cached elements */</span> |
| <span class="source-line-no">247</span><span id="line-247"> private final AtomicLong elements;</span> |
| <span class="source-line-no">248</span><span id="line-248"></span> |
| <span class="source-line-no">249</span><span id="line-249"> /** Current number of cached data block elements */</span> |
| <span class="source-line-no">250</span><span id="line-250"> private final LongAdder dataBlockElements;</span> |
| <span class="source-line-no">251</span><span id="line-251"></span> |
| <span class="source-line-no">252</span><span id="line-252"> /** Cache access count (sequential ID) */</span> |
| <span class="source-line-no">253</span><span id="line-253"> private final AtomicLong count;</span> |
| <span class="source-line-no">254</span><span id="line-254"></span> |
| <span class="source-line-no">255</span><span id="line-255"> /** hard capacity limit */</span> |
| <span class="source-line-no">256</span><span id="line-256"> private final float hardCapacityLimitFactor;</span> |
| <span class="source-line-no">257</span><span id="line-257"></span> |
| <span class="source-line-no">258</span><span id="line-258"> /** Cache statistics */</span> |
| <span class="source-line-no">259</span><span id="line-259"> private final CacheStats stats;</span> |
| <span class="source-line-no">260</span><span id="line-260"></span> |
| <span class="source-line-no">261</span><span id="line-261"> /** Maximum allowable size of cache (block put if size > max, evict) */</span> |
| <span class="source-line-no">262</span><span id="line-262"> private long maxSize;</span> |
| <span class="source-line-no">263</span><span id="line-263"></span> |
| <span class="source-line-no">264</span><span id="line-264"> /** Approximate block size */</span> |
| <span class="source-line-no">265</span><span id="line-265"> private final long blockSize;</span> |
| <span class="source-line-no">266</span><span id="line-266"></span> |
| <span class="source-line-no">267</span><span id="line-267"> /** Acceptable size of cache (no evictions if size < acceptable) */</span> |
| <span class="source-line-no">268</span><span id="line-268"> private final float acceptableFactor;</span> |
| <span class="source-line-no">269</span><span id="line-269"></span> |
| <span class="source-line-no">270</span><span id="line-270"> /** Minimum threshold of cache (when evicting, evict until size < min) */</span> |
| <span class="source-line-no">271</span><span id="line-271"> private final float minFactor;</span> |
| <span class="source-line-no">272</span><span id="line-272"></span> |
| <span class="source-line-no">273</span><span id="line-273"> /** Single access bucket size */</span> |
| <span class="source-line-no">274</span><span id="line-274"> private final float singleFactor;</span> |
| <span class="source-line-no">275</span><span id="line-275"></span> |
| <span class="source-line-no">276</span><span id="line-276"> /** Multiple access bucket size */</span> |
| <span class="source-line-no">277</span><span id="line-277"> private final float multiFactor;</span> |
| <span class="source-line-no">278</span><span id="line-278"></span> |
| <span class="source-line-no">279</span><span id="line-279"> /** In-memory bucket size */</span> |
| <span class="source-line-no">280</span><span id="line-280"> private final float memoryFactor;</span> |
| <span class="source-line-no">281</span><span id="line-281"></span> |
| <span class="source-line-no">282</span><span id="line-282"> /** Overhead of the structure itself */</span> |
| <span class="source-line-no">283</span><span id="line-283"> private final long overhead;</span> |
| <span class="source-line-no">284</span><span id="line-284"></span> |
| <span class="source-line-no">285</span><span id="line-285"> /** Whether in-memory hfile's data block has higher priority when evicting */</span> |
| <span class="source-line-no">286</span><span id="line-286"> private boolean forceInMemory;</span> |
| <span class="source-line-no">287</span><span id="line-287"></span> |
| <span class="source-line-no">288</span><span id="line-288"> /**</span> |
| <span class="source-line-no">289</span><span id="line-289"> * Where to send victims (blocks evicted/missing from the cache). This is used only when we use an</span> |
| <span class="source-line-no">290</span><span id="line-290"> * external cache as L2. Note: See org.apache.hadoop.hbase.io.hfile.MemcachedBlockCache</span> |
| <span class="source-line-no">291</span><span id="line-291"> */</span> |
| <span class="source-line-no">292</span><span id="line-292"> private transient BlockCache victimHandler = null;</span> |
| <span class="source-line-no">293</span><span id="line-293"></span> |
| <span class="source-line-no">294</span><span id="line-294"> /** Percent of cached data blocks */</span> |
| <span class="source-line-no">295</span><span id="line-295"> private volatile int cacheDataBlockPercent;</span> |
| <span class="source-line-no">296</span><span id="line-296"></span> |
| <span class="source-line-no">297</span><span id="line-297"> /** Limit of count eviction process when start to avoid to cache blocks */</span> |
| <span class="source-line-no">298</span><span id="line-298"> private final int heavyEvictionCountLimit;</span> |
| <span class="source-line-no">299</span><span id="line-299"></span> |
| <span class="source-line-no">300</span><span id="line-300"> /** Limit of volume eviction process when start to avoid to cache blocks */</span> |
| <span class="source-line-no">301</span><span id="line-301"> private final long heavyEvictionMbSizeLimit;</span> |
| <span class="source-line-no">302</span><span id="line-302"></span> |
| <span class="source-line-no">303</span><span id="line-303"> /** Adjust auto-scaling via overhead of evition rate */</span> |
| <span class="source-line-no">304</span><span id="line-304"> private final float heavyEvictionOverheadCoefficient;</span> |
| <span class="source-line-no">305</span><span id="line-305"></span> |
| <span class="source-line-no">306</span><span id="line-306"> /**</span> |
| <span class="source-line-no">307</span><span id="line-307"> * Default constructor. Specify maximum size and expected average block size (approximation is</span> |
| <span class="source-line-no">308</span><span id="line-308"> * fine).</span> |
| <span class="source-line-no">309</span><span id="line-309"> * <p></span> |
| <span class="source-line-no">310</span><span id="line-310"> * All other factors will be calculated based on defaults specified in this class.</span> |
| <span class="source-line-no">311</span><span id="line-311"> * @param maxSize maximum size of cache, in bytes</span> |
| <span class="source-line-no">312</span><span id="line-312"> * @param blockSize approximate size of each block, in bytes</span> |
| <span class="source-line-no">313</span><span id="line-313"> */</span> |
| <span class="source-line-no">314</span><span id="line-314"> public LruAdaptiveBlockCache(long maxSize, long blockSize) {</span> |
| <span class="source-line-no">315</span><span id="line-315"> this(maxSize, blockSize, true);</span> |
| <span class="source-line-no">316</span><span id="line-316"> }</span> |
| <span class="source-line-no">317</span><span id="line-317"></span> |
| <span class="source-line-no">318</span><span id="line-318"> /**</span> |
| <span class="source-line-no">319</span><span id="line-319"> * Constructor used for testing. Allows disabling of the eviction thread.</span> |
| <span class="source-line-no">320</span><span id="line-320"> */</span> |
| <span class="source-line-no">321</span><span id="line-321"> public LruAdaptiveBlockCache(long maxSize, long blockSize, boolean evictionThread) {</span> |
| <span class="source-line-no">322</span><span id="line-322"> this(maxSize, blockSize, evictionThread, (int) Math.ceil(1.2 * maxSize / blockSize),</span> |
| <span class="source-line-no">323</span><span id="line-323"> DEFAULT_LOAD_FACTOR, DEFAULT_CONCURRENCY_LEVEL, DEFAULT_MIN_FACTOR, DEFAULT_ACCEPTABLE_FACTOR,</span> |
| <span class="source-line-no">324</span><span id="line-324"> DEFAULT_SINGLE_FACTOR, DEFAULT_MULTI_FACTOR, DEFAULT_MEMORY_FACTOR,</span> |
| <span class="source-line-no">325</span><span id="line-325"> DEFAULT_HARD_CAPACITY_LIMIT_FACTOR, false, DEFAULT_MAX_BLOCK_SIZE,</span> |
| <span class="source-line-no">326</span><span id="line-326"> DEFAULT_LRU_CACHE_HEAVY_EVICTION_COUNT_LIMIT, DEFAULT_LRU_CACHE_HEAVY_EVICTION_MB_SIZE_LIMIT,</span> |
| <span class="source-line-no">327</span><span id="line-327"> DEFAULT_LRU_CACHE_HEAVY_EVICTION_OVERHEAD_COEFFICIENT);</span> |
| <span class="source-line-no">328</span><span id="line-328"> }</span> |
| <span class="source-line-no">329</span><span id="line-329"></span> |
| <span class="source-line-no">330</span><span id="line-330"> public LruAdaptiveBlockCache(long maxSize, long blockSize, boolean evictionThread,</span> |
| <span class="source-line-no">331</span><span id="line-331"> Configuration conf) {</span> |
| <span class="source-line-no">332</span><span id="line-332"> this(maxSize, blockSize, evictionThread, (int) Math.ceil(1.2 * maxSize / blockSize),</span> |
| <span class="source-line-no">333</span><span id="line-333"> DEFAULT_LOAD_FACTOR, DEFAULT_CONCURRENCY_LEVEL,</span> |
| <span class="source-line-no">334</span><span id="line-334"> conf.getFloat(LRU_MIN_FACTOR_CONFIG_NAME, DEFAULT_MIN_FACTOR),</span> |
| <span class="source-line-no">335</span><span id="line-335"> conf.getFloat(LRU_ACCEPTABLE_FACTOR_CONFIG_NAME, DEFAULT_ACCEPTABLE_FACTOR),</span> |
| <span class="source-line-no">336</span><span id="line-336"> conf.getFloat(LRU_SINGLE_PERCENTAGE_CONFIG_NAME, DEFAULT_SINGLE_FACTOR),</span> |
| <span class="source-line-no">337</span><span id="line-337"> conf.getFloat(LRU_MULTI_PERCENTAGE_CONFIG_NAME, DEFAULT_MULTI_FACTOR),</span> |
| <span class="source-line-no">338</span><span id="line-338"> conf.getFloat(LRU_MEMORY_PERCENTAGE_CONFIG_NAME, DEFAULT_MEMORY_FACTOR),</span> |
| <span class="source-line-no">339</span><span id="line-339"> conf.getFloat(LRU_HARD_CAPACITY_LIMIT_FACTOR_CONFIG_NAME, DEFAULT_HARD_CAPACITY_LIMIT_FACTOR),</span> |
| <span class="source-line-no">340</span><span id="line-340"> conf.getBoolean(LRU_IN_MEMORY_FORCE_MODE_CONFIG_NAME, DEFAULT_IN_MEMORY_FORCE_MODE),</span> |
| <span class="source-line-no">341</span><span id="line-341"> conf.getLong(LRU_MAX_BLOCK_SIZE, DEFAULT_MAX_BLOCK_SIZE),</span> |
| <span class="source-line-no">342</span><span id="line-342"> conf.getInt(LRU_CACHE_HEAVY_EVICTION_COUNT_LIMIT,</span> |
| <span class="source-line-no">343</span><span id="line-343"> DEFAULT_LRU_CACHE_HEAVY_EVICTION_COUNT_LIMIT),</span> |
| <span class="source-line-no">344</span><span id="line-344"> conf.getLong(LRU_CACHE_HEAVY_EVICTION_MB_SIZE_LIMIT,</span> |
| <span class="source-line-no">345</span><span id="line-345"> DEFAULT_LRU_CACHE_HEAVY_EVICTION_MB_SIZE_LIMIT),</span> |
| <span class="source-line-no">346</span><span id="line-346"> conf.getFloat(LRU_CACHE_HEAVY_EVICTION_OVERHEAD_COEFFICIENT,</span> |
| <span class="source-line-no">347</span><span id="line-347"> DEFAULT_LRU_CACHE_HEAVY_EVICTION_OVERHEAD_COEFFICIENT));</span> |
| <span class="source-line-no">348</span><span id="line-348"> }</span> |
| <span class="source-line-no">349</span><span id="line-349"></span> |
| <span class="source-line-no">350</span><span id="line-350"> public LruAdaptiveBlockCache(long maxSize, long blockSize, Configuration conf) {</span> |
| <span class="source-line-no">351</span><span id="line-351"> this(maxSize, blockSize, true, conf);</span> |
| <span class="source-line-no">352</span><span id="line-352"> }</span> |
| <span class="source-line-no">353</span><span id="line-353"></span> |
| <span class="source-line-no">354</span><span id="line-354"> /**</span> |
| <span class="source-line-no">355</span><span id="line-355"> * Configurable constructor. Use this constructor if not using defaults.</span> |
| <span class="source-line-no">356</span><span id="line-356"> * @param maxSize maximum size of this cache, in bytes</span> |
| <span class="source-line-no">357</span><span id="line-357"> * @param blockSize expected average size of blocks, in bytes</span> |
| <span class="source-line-no">358</span><span id="line-358"> * @param evictionThread whether to run evictions in a bg thread or not</span> |
| <span class="source-line-no">359</span><span id="line-359"> * @param mapInitialSize initial size of backing ConcurrentHashMap</span> |
| <span class="source-line-no">360</span><span id="line-360"> * @param mapLoadFactor initial load factor of backing ConcurrentHashMap</span> |
| <span class="source-line-no">361</span><span id="line-361"> * @param mapConcurrencyLevel initial concurrency factor for backing CHM</span> |
| <span class="source-line-no">362</span><span id="line-362"> * @param minFactor percentage of total size that eviction will evict until</span> |
| <span class="source-line-no">363</span><span id="line-363"> * @param acceptableFactor percentage of total size that triggers eviction</span> |
| <span class="source-line-no">364</span><span id="line-364"> * @param singleFactor percentage of total size for single-access blocks</span> |
| <span class="source-line-no">365</span><span id="line-365"> * @param multiFactor percentage of total size for multiple-access blocks</span> |
| <span class="source-line-no">366</span><span id="line-366"> * @param memoryFactor percentage of total size for in-memory blocks</span> |
| <span class="source-line-no">367</span><span id="line-367"> * @param hardLimitFactor hard capacity limit</span> |
| <span class="source-line-no">368</span><span id="line-368"> * @param forceInMemory in-memory hfile's data block has higher priority when</span> |
| <span class="source-line-no">369</span><span id="line-369"> * evicting</span> |
| <span class="source-line-no">370</span><span id="line-370"> * @param maxBlockSize maximum block size for caching</span> |
| <span class="source-line-no">371</span><span id="line-371"> * @param heavyEvictionCountLimit when starts AdaptiveLRU algoritm work</span> |
| <span class="source-line-no">372</span><span id="line-372"> * @param heavyEvictionMbSizeLimit how many bytes desirable putting into BlockCache</span> |
| <span class="source-line-no">373</span><span id="line-373"> * @param heavyEvictionOverheadCoefficient how aggressive AdaptiveLRU will reduce GC</span> |
| <span class="source-line-no">374</span><span id="line-374"> */</span> |
| <span class="source-line-no">375</span><span id="line-375"> public LruAdaptiveBlockCache(long maxSize, long blockSize, boolean evictionThread,</span> |
| <span class="source-line-no">376</span><span id="line-376"> int mapInitialSize, float mapLoadFactor, int mapConcurrencyLevel, float minFactor,</span> |
| <span class="source-line-no">377</span><span id="line-377"> float acceptableFactor, float singleFactor, float multiFactor, float memoryFactor,</span> |
| <span class="source-line-no">378</span><span id="line-378"> float hardLimitFactor, boolean forceInMemory, long maxBlockSize, int heavyEvictionCountLimit,</span> |
| <span class="source-line-no">379</span><span id="line-379"> long heavyEvictionMbSizeLimit, float heavyEvictionOverheadCoefficient) {</span> |
| <span class="source-line-no">380</span><span id="line-380"> this.maxBlockSize = maxBlockSize;</span> |
| <span class="source-line-no">381</span><span id="line-381"> if (</span> |
| <span class="source-line-no">382</span><span id="line-382"> singleFactor + multiFactor + memoryFactor != 1 || singleFactor < 0 || multiFactor < 0</span> |
| <span class="source-line-no">383</span><span id="line-383"> || memoryFactor < 0</span> |
| <span class="source-line-no">384</span><span id="line-384"> ) {</span> |
| <span class="source-line-no">385</span><span id="line-385"> throw new IllegalArgumentException(</span> |
| <span class="source-line-no">386</span><span id="line-386"> "Single, multi, and memory factors " + " should be non-negative and total 1.0");</span> |
| <span class="source-line-no">387</span><span id="line-387"> }</span> |
| <span class="source-line-no">388</span><span id="line-388"> if (minFactor >= acceptableFactor) {</span> |
| <span class="source-line-no">389</span><span id="line-389"> throw new IllegalArgumentException("minFactor must be smaller than acceptableFactor");</span> |
| <span class="source-line-no">390</span><span id="line-390"> }</span> |
| <span class="source-line-no">391</span><span id="line-391"> if (minFactor >= 1.0f || acceptableFactor >= 1.0f) {</span> |
| <span class="source-line-no">392</span><span id="line-392"> throw new IllegalArgumentException("all factors must be < 1");</span> |
| <span class="source-line-no">393</span><span id="line-393"> }</span> |
| <span class="source-line-no">394</span><span id="line-394"> this.maxSize = maxSize;</span> |
| <span class="source-line-no">395</span><span id="line-395"> this.blockSize = blockSize;</span> |
| <span class="source-line-no">396</span><span id="line-396"> this.forceInMemory = forceInMemory;</span> |
| <span class="source-line-no">397</span><span id="line-397"> map = new ConcurrentHashMap<>(mapInitialSize, mapLoadFactor, mapConcurrencyLevel);</span> |
| <span class="source-line-no">398</span><span id="line-398"> this.minFactor = minFactor;</span> |
| <span class="source-line-no">399</span><span id="line-399"> this.acceptableFactor = acceptableFactor;</span> |
| <span class="source-line-no">400</span><span id="line-400"> this.singleFactor = singleFactor;</span> |
| <span class="source-line-no">401</span><span id="line-401"> this.multiFactor = multiFactor;</span> |
| <span class="source-line-no">402</span><span id="line-402"> this.memoryFactor = memoryFactor;</span> |
| <span class="source-line-no">403</span><span id="line-403"> this.stats = new CacheStats(this.getClass().getSimpleName());</span> |
| <span class="source-line-no">404</span><span id="line-404"> this.count = new AtomicLong(0);</span> |
| <span class="source-line-no">405</span><span id="line-405"> this.elements = new AtomicLong(0);</span> |
| <span class="source-line-no">406</span><span id="line-406"> this.dataBlockElements = new LongAdder();</span> |
| <span class="source-line-no">407</span><span id="line-407"> this.dataBlockSize = new LongAdder();</span> |
| <span class="source-line-no">408</span><span id="line-408"> this.overhead = calculateOverhead(maxSize, blockSize, mapConcurrencyLevel);</span> |
| <span class="source-line-no">409</span><span id="line-409"> this.size = new AtomicLong(this.overhead);</span> |
| <span class="source-line-no">410</span><span id="line-410"> this.hardCapacityLimitFactor = hardLimitFactor;</span> |
| <span class="source-line-no">411</span><span id="line-411"> if (evictionThread) {</span> |
| <span class="source-line-no">412</span><span id="line-412"> this.evictionThread = new EvictionThread(this);</span> |
| <span class="source-line-no">413</span><span id="line-413"> this.evictionThread.start(); // FindBugs SC_START_IN_CTOR</span> |
| <span class="source-line-no">414</span><span id="line-414"> } else {</span> |
| <span class="source-line-no">415</span><span id="line-415"> this.evictionThread = null;</span> |
| <span class="source-line-no">416</span><span id="line-416"> }</span> |
| <span class="source-line-no">417</span><span id="line-417"></span> |
| <span class="source-line-no">418</span><span id="line-418"> // check the bounds</span> |
| <span class="source-line-no">419</span><span id="line-419"> this.heavyEvictionCountLimit = Math.max(heavyEvictionCountLimit, 0);</span> |
| <span class="source-line-no">420</span><span id="line-420"> this.heavyEvictionMbSizeLimit = Math.max(heavyEvictionMbSizeLimit, 1);</span> |
| <span class="source-line-no">421</span><span id="line-421"> this.cacheDataBlockPercent = 100;</span> |
| <span class="source-line-no">422</span><span id="line-422"> heavyEvictionOverheadCoefficient = Math.min(heavyEvictionOverheadCoefficient, 1.0f);</span> |
| <span class="source-line-no">423</span><span id="line-423"> heavyEvictionOverheadCoefficient = Math.max(heavyEvictionOverheadCoefficient, 0.001f);</span> |
| <span class="source-line-no">424</span><span id="line-424"> this.heavyEvictionOverheadCoefficient = heavyEvictionOverheadCoefficient;</span> |
| <span class="source-line-no">425</span><span id="line-425"></span> |
| <span class="source-line-no">426</span><span id="line-426"> // TODO: Add means of turning this off. Bit obnoxious running thread just to make a log</span> |
| <span class="source-line-no">427</span><span id="line-427"> // every five minutes.</span> |
| <span class="source-line-no">428</span><span id="line-428"> this.scheduleThreadPool.scheduleAtFixedRate(new StatisticsThread(this), STAT_THREAD_PERIOD,</span> |
| <span class="source-line-no">429</span><span id="line-429"> STAT_THREAD_PERIOD, TimeUnit.SECONDS);</span> |
| <span class="source-line-no">430</span><span id="line-430"> }</span> |
| <span class="source-line-no">431</span><span id="line-431"></span> |
| <span class="source-line-no">432</span><span id="line-432"> @Override</span> |
| <span class="source-line-no">433</span><span id="line-433"> public void setVictimCache(BlockCache victimCache) {</span> |
| <span class="source-line-no">434</span><span id="line-434"> if (victimHandler != null) {</span> |
| <span class="source-line-no">435</span><span id="line-435"> throw new IllegalArgumentException("The victim cache has already been set");</span> |
| <span class="source-line-no">436</span><span id="line-436"> }</span> |
| <span class="source-line-no">437</span><span id="line-437"> victimHandler = requireNonNull(victimCache);</span> |
| <span class="source-line-no">438</span><span id="line-438"> }</span> |
| <span class="source-line-no">439</span><span id="line-439"></span> |
| <span class="source-line-no">440</span><span id="line-440"> @Override</span> |
| <span class="source-line-no">441</span><span id="line-441"> public void setMaxSize(long maxSize) {</span> |
| <span class="source-line-no">442</span><span id="line-442"> this.maxSize = maxSize;</span> |
| <span class="source-line-no">443</span><span id="line-443"> if (this.size.get() > acceptableSize() && !evictionInProgress) {</span> |
| <span class="source-line-no">444</span><span id="line-444"> runEviction();</span> |
| <span class="source-line-no">445</span><span id="line-445"> }</span> |
| <span class="source-line-no">446</span><span id="line-446"> }</span> |
| <span class="source-line-no">447</span><span id="line-447"></span> |
| <span class="source-line-no">448</span><span id="line-448"> public int getCacheDataBlockPercent() {</span> |
| <span class="source-line-no">449</span><span id="line-449"> return cacheDataBlockPercent;</span> |
| <span class="source-line-no">450</span><span id="line-450"> }</span> |
| <span class="source-line-no">451</span><span id="line-451"></span> |
| <span class="source-line-no">452</span><span id="line-452"> /**</span> |
| <span class="source-line-no">453</span><span id="line-453"> * The block cached in LruAdaptiveBlockCache will always be an heap block: on the one side, the</span> |
| <span class="source-line-no">454</span><span id="line-454"> * heap access will be more faster then off-heap, the small index block or meta block cached in</span> |
| <span class="source-line-no">455</span><span id="line-455"> * CombinedBlockCache will benefit a lot. on other side, the LruAdaptiveBlockCache size is always</span> |
| <span class="source-line-no">456</span><span id="line-456"> * calculated based on the total heap size, if caching an off-heap block in LruAdaptiveBlockCache,</span> |
| <span class="source-line-no">457</span><span id="line-457"> * the heap size will be messed up. Here we will clone the block into an heap block if it's an</span> |
| <span class="source-line-no">458</span><span id="line-458"> * off-heap block, otherwise just use the original block. The key point is maintain the refCnt of</span> |
| <span class="source-line-no">459</span><span id="line-459"> * the block (HBASE-22127): <br></span> |
| <span class="source-line-no">460</span><span id="line-460"> * 1. if cache the cloned heap block, its refCnt is an totally new one, it's easy to handle; <br></span> |
| <span class="source-line-no">461</span><span id="line-461"> * 2. if cache the original heap block, we're sure that it won't be tracked in ByteBuffAllocator's</span> |
| <span class="source-line-no">462</span><span id="line-462"> * reservoir, if both RPC and LruAdaptiveBlockCache release the block, then it can be garbage</span> |
| <span class="source-line-no">463</span><span id="line-463"> * collected by JVM, so need a retain here.</span> |
| <span class="source-line-no">464</span><span id="line-464"> * @param buf the original block</span> |
| <span class="source-line-no">465</span><span id="line-465"> * @return an block with an heap memory backend.</span> |
| <span class="source-line-no">466</span><span id="line-466"> */</span> |
| <span class="source-line-no">467</span><span id="line-467"> private Cacheable asReferencedHeapBlock(Cacheable buf) {</span> |
| <span class="source-line-no">468</span><span id="line-468"> if (buf instanceof HFileBlock) {</span> |
| <span class="source-line-no">469</span><span id="line-469"> HFileBlock blk = ((HFileBlock) buf);</span> |
| <span class="source-line-no">470</span><span id="line-470"> if (blk.isSharedMem()) {</span> |
| <span class="source-line-no">471</span><span id="line-471"> return HFileBlock.deepCloneOnHeap(blk);</span> |
| <span class="source-line-no">472</span><span id="line-472"> }</span> |
| <span class="source-line-no">473</span><span id="line-473"> }</span> |
| <span class="source-line-no">474</span><span id="line-474"> // The block will be referenced by this LruAdaptiveBlockCache,</span> |
| <span class="source-line-no">475</span><span id="line-475"> // so should increase its refCnt here.</span> |
| <span class="source-line-no">476</span><span id="line-476"> return buf.retain();</span> |
| <span class="source-line-no">477</span><span id="line-477"> }</span> |
| <span class="source-line-no">478</span><span id="line-478"></span> |
| <span class="source-line-no">479</span><span id="line-479"> // BlockCache implementation</span> |
| <span class="source-line-no">480</span><span id="line-480"></span> |
| <span class="source-line-no">481</span><span id="line-481"> /**</span> |
| <span class="source-line-no">482</span><span id="line-482"> * Cache the block with the specified name and buffer.</span> |
| <span class="source-line-no">483</span><span id="line-483"> * <p></span> |
| <span class="source-line-no">484</span><span id="line-484"> * It is assumed this will NOT be called on an already cached block. In rare cases (HBASE-8547)</span> |
| <span class="source-line-no">485</span><span id="line-485"> * this can happen, for which we compare the buffer contents.</span> |
| <span class="source-line-no">486</span><span id="line-486"> * @param cacheKey block's cache key</span> |
| <span class="source-line-no">487</span><span id="line-487"> * @param buf block buffer</span> |
| <span class="source-line-no">488</span><span id="line-488"> * @param inMemory if block is in-memory</span> |
| <span class="source-line-no">489</span><span id="line-489"> */</span> |
| <span class="source-line-no">490</span><span id="line-490"> @Override</span> |
| <span class="source-line-no">491</span><span id="line-491"> public void cacheBlock(BlockCacheKey cacheKey, Cacheable buf, boolean inMemory) {</span> |
| <span class="source-line-no">492</span><span id="line-492"></span> |
| <span class="source-line-no">493</span><span id="line-493"> // Some data blocks will not put into BlockCache when eviction rate too much.</span> |
| <span class="source-line-no">494</span><span id="line-494"> // It is good for performance</span> |
| <span class="source-line-no">495</span><span id="line-495"> // (see details: https://issues.apache.org/jira/browse/HBASE-23887)</span> |
| <span class="source-line-no">496</span><span id="line-496"> // How to calculate it can find inside EvictionThread class.</span> |
| <span class="source-line-no">497</span><span id="line-497"> if (cacheDataBlockPercent != 100 && buf.getBlockType().isData()) {</span> |
| <span class="source-line-no">498</span><span id="line-498"> // It works like filter - blocks which two last digits of offset</span> |
| <span class="source-line-no">499</span><span id="line-499"> // more than we calculate in Eviction Thread will not put into BlockCache</span> |
| <span class="source-line-no">500</span><span id="line-500"> if (cacheKey.getOffset() % 100 >= cacheDataBlockPercent) {</span> |
| <span class="source-line-no">501</span><span id="line-501"> return;</span> |
| <span class="source-line-no">502</span><span id="line-502"> }</span> |
| <span class="source-line-no">503</span><span id="line-503"> }</span> |
| <span class="source-line-no">504</span><span id="line-504"></span> |
| <span class="source-line-no">505</span><span id="line-505"> if (buf.heapSize() > maxBlockSize) {</span> |
| <span class="source-line-no">506</span><span id="line-506"> // If there are a lot of blocks that are too</span> |
| <span class="source-line-no">507</span><span id="line-507"> // big this can make the logs way too noisy.</span> |
| <span class="source-line-no">508</span><span id="line-508"> // So we log 2%</span> |
| <span class="source-line-no">509</span><span id="line-509"> if (stats.failInsert() % 50 == 0) {</span> |
| <span class="source-line-no">510</span><span id="line-510"> LOG.warn("Trying to cache too large a block " + cacheKey.getHfileName() + " @ "</span> |
| <span class="source-line-no">511</span><span id="line-511"> + cacheKey.getOffset() + " is " + buf.heapSize() + " which is larger than "</span> |
| <span class="source-line-no">512</span><span id="line-512"> + maxBlockSize);</span> |
| <span class="source-line-no">513</span><span id="line-513"> }</span> |
| <span class="source-line-no">514</span><span id="line-514"> return;</span> |
| <span class="source-line-no">515</span><span id="line-515"> }</span> |
| <span class="source-line-no">516</span><span id="line-516"></span> |
| <span class="source-line-no">517</span><span id="line-517"> LruCachedBlock cb = map.get(cacheKey);</span> |
| <span class="source-line-no">518</span><span id="line-518"> if (cb != null && !BlockCacheUtil.shouldReplaceExistingCacheBlock(this, cacheKey, buf)) {</span> |
| <span class="source-line-no">519</span><span id="line-519"> return;</span> |
| <span class="source-line-no">520</span><span id="line-520"> }</span> |
| <span class="source-line-no">521</span><span id="line-521"> long currentSize = size.get();</span> |
| <span class="source-line-no">522</span><span id="line-522"> long currentAcceptableSize = acceptableSize();</span> |
| <span class="source-line-no">523</span><span id="line-523"> long hardLimitSize = (long) (hardCapacityLimitFactor * currentAcceptableSize);</span> |
| <span class="source-line-no">524</span><span id="line-524"> if (currentSize >= hardLimitSize) {</span> |
| <span class="source-line-no">525</span><span id="line-525"> stats.failInsert();</span> |
| <span class="source-line-no">526</span><span id="line-526"> if (LOG.isTraceEnabled()) {</span> |
| <span class="source-line-no">527</span><span id="line-527"> LOG.trace("LruAdaptiveBlockCache current size " + StringUtils.byteDesc(currentSize)</span> |
| <span class="source-line-no">528</span><span id="line-528"> + " has exceeded acceptable size " + StringUtils.byteDesc(currentAcceptableSize) + "."</span> |
| <span class="source-line-no">529</span><span id="line-529"> + " The hard limit size is " + StringUtils.byteDesc(hardLimitSize)</span> |
| <span class="source-line-no">530</span><span id="line-530"> + ", failed to put cacheKey:" + cacheKey + " into LruAdaptiveBlockCache.");</span> |
| <span class="source-line-no">531</span><span id="line-531"> }</span> |
| <span class="source-line-no">532</span><span id="line-532"> if (!evictionInProgress) {</span> |
| <span class="source-line-no">533</span><span id="line-533"> runEviction();</span> |
| <span class="source-line-no">534</span><span id="line-534"> }</span> |
| <span class="source-line-no">535</span><span id="line-535"> return;</span> |
| <span class="source-line-no">536</span><span id="line-536"> }</span> |
| <span class="source-line-no">537</span><span id="line-537"> // Ensure that the block is an heap one.</span> |
| <span class="source-line-no">538</span><span id="line-538"> buf = asReferencedHeapBlock(buf);</span> |
| <span class="source-line-no">539</span><span id="line-539"> cb = new LruCachedBlock(cacheKey, buf, count.incrementAndGet(), inMemory);</span> |
| <span class="source-line-no">540</span><span id="line-540"> long newSize = updateSizeMetrics(cb, false);</span> |
| <span class="source-line-no">541</span><span id="line-541"> map.put(cacheKey, cb);</span> |
| <span class="source-line-no">542</span><span id="line-542"> long val = elements.incrementAndGet();</span> |
| <span class="source-line-no">543</span><span id="line-543"> if (buf.getBlockType().isData()) {</span> |
| <span class="source-line-no">544</span><span id="line-544"> dataBlockElements.increment();</span> |
| <span class="source-line-no">545</span><span id="line-545"> }</span> |
| <span class="source-line-no">546</span><span id="line-546"> if (LOG.isTraceEnabled()) {</span> |
| <span class="source-line-no">547</span><span id="line-547"> long size = map.size();</span> |
| <span class="source-line-no">548</span><span id="line-548"> assertCounterSanity(size, val);</span> |
| <span class="source-line-no">549</span><span id="line-549"> }</span> |
| <span class="source-line-no">550</span><span id="line-550"> if (newSize > currentAcceptableSize && !evictionInProgress) {</span> |
| <span class="source-line-no">551</span><span id="line-551"> runEviction();</span> |
| <span class="source-line-no">552</span><span id="line-552"> }</span> |
| <span class="source-line-no">553</span><span id="line-553"> }</span> |
| <span class="source-line-no">554</span><span id="line-554"></span> |
| <span class="source-line-no">555</span><span id="line-555"> /**</span> |
| <span class="source-line-no">556</span><span id="line-556"> * Sanity-checking for parity between actual block cache content and metrics. Intended only for</span> |
| <span class="source-line-no">557</span><span id="line-557"> * use with TRACE level logging and -ea JVM.</span> |
| <span class="source-line-no">558</span><span id="line-558"> */</span> |
| <span class="source-line-no">559</span><span id="line-559"> private static void assertCounterSanity(long mapSize, long counterVal) {</span> |
| <span class="source-line-no">560</span><span id="line-560"> if (counterVal < 0) {</span> |
| <span class="source-line-no">561</span><span id="line-561"> LOG.trace("counterVal overflow. Assertions unreliable. counterVal=" + counterVal</span> |
| <span class="source-line-no">562</span><span id="line-562"> + ", mapSize=" + mapSize);</span> |
| <span class="source-line-no">563</span><span id="line-563"> return;</span> |
| <span class="source-line-no">564</span><span id="line-564"> }</span> |
| <span class="source-line-no">565</span><span id="line-565"> if (mapSize < Integer.MAX_VALUE) {</span> |
| <span class="source-line-no">566</span><span id="line-566"> double pct_diff = Math.abs((((double) counterVal) / ((double) mapSize)) - 1.);</span> |
| <span class="source-line-no">567</span><span id="line-567"> if (pct_diff > 0.05) {</span> |
| <span class="source-line-no">568</span><span id="line-568"> LOG.trace("delta between reported and actual size > 5%. counterVal=" + counterVal</span> |
| <span class="source-line-no">569</span><span id="line-569"> + ", mapSize=" + mapSize);</span> |
| <span class="source-line-no">570</span><span id="line-570"> }</span> |
| <span class="source-line-no">571</span><span id="line-571"> }</span> |
| <span class="source-line-no">572</span><span id="line-572"> }</span> |
| <span class="source-line-no">573</span><span id="line-573"></span> |
| <span class="source-line-no">574</span><span id="line-574"> /**</span> |
| <span class="source-line-no">575</span><span id="line-575"> * Cache the block with the specified name and buffer.</span> |
| <span class="source-line-no">576</span><span id="line-576"> * <p></span> |
| <span class="source-line-no">577</span><span id="line-577"> * TODO after HBASE-22005, we may cache an block which allocated from off-heap, but our LRU cache</span> |
| <span class="source-line-no">578</span><span id="line-578"> * sizing is based on heap size, so we should handle this in HBASE-22127. It will introduce an</span> |
| <span class="source-line-no">579</span><span id="line-579"> * switch whether make the LRU on-heap or not, if so we may need copy the memory to on-heap,</span> |
| <span class="source-line-no">580</span><span id="line-580"> * otherwise the caching size is based on off-heap.</span> |
| <span class="source-line-no">581</span><span id="line-581"> * @param cacheKey block's cache key</span> |
| <span class="source-line-no">582</span><span id="line-582"> * @param buf block buffer</span> |
| <span class="source-line-no">583</span><span id="line-583"> */</span> |
| <span class="source-line-no">584</span><span id="line-584"> @Override</span> |
| <span class="source-line-no">585</span><span id="line-585"> public void cacheBlock(BlockCacheKey cacheKey, Cacheable buf) {</span> |
| <span class="source-line-no">586</span><span id="line-586"> cacheBlock(cacheKey, buf, false);</span> |
| <span class="source-line-no">587</span><span id="line-587"> }</span> |
| <span class="source-line-no">588</span><span id="line-588"></span> |
| <span class="source-line-no">589</span><span id="line-589"> /**</span> |
| <span class="source-line-no">590</span><span id="line-590"> * Helper function that updates the local size counter and also updates any per-cf or</span> |
| <span class="source-line-no">591</span><span id="line-591"> * per-blocktype metrics it can discern from given {@link LruCachedBlock}</span> |
| <span class="source-line-no">592</span><span id="line-592"> */</span> |
| <span class="source-line-no">593</span><span id="line-593"> private long updateSizeMetrics(LruCachedBlock cb, boolean evict) {</span> |
| <span class="source-line-no">594</span><span id="line-594"> long heapsize = cb.heapSize();</span> |
| <span class="source-line-no">595</span><span id="line-595"> BlockType bt = cb.getBuffer().getBlockType();</span> |
| <span class="source-line-no">596</span><span id="line-596"> if (evict) {</span> |
| <span class="source-line-no">597</span><span id="line-597"> heapsize *= -1;</span> |
| <span class="source-line-no">598</span><span id="line-598"> }</span> |
| <span class="source-line-no">599</span><span id="line-599"> if (bt != null && bt.isData()) {</span> |
| <span class="source-line-no">600</span><span id="line-600"> dataBlockSize.add(heapsize);</span> |
| <span class="source-line-no">601</span><span id="line-601"> }</span> |
| <span class="source-line-no">602</span><span id="line-602"> return size.addAndGet(heapsize);</span> |
| <span class="source-line-no">603</span><span id="line-603"> }</span> |
| <span class="source-line-no">604</span><span id="line-604"></span> |
| <span class="source-line-no">605</span><span id="line-605"> /**</span> |
| <span class="source-line-no">606</span><span id="line-606"> * Get the buffer of the block with the specified name.</span> |
| <span class="source-line-no">607</span><span id="line-607"> * @param cacheKey block's cache key</span> |
| <span class="source-line-no">608</span><span id="line-608"> * @param caching true if the caller caches blocks on cache misses</span> |
| <span class="source-line-no">609</span><span id="line-609"> * @param repeat Whether this is a repeat lookup for the same block (used to avoid</span> |
| <span class="source-line-no">610</span><span id="line-610"> * double counting cache misses when doing double-check locking)</span> |
| <span class="source-line-no">611</span><span id="line-611"> * @param updateCacheMetrics Whether to update cache metrics or not</span> |
| <span class="source-line-no">612</span><span id="line-612"> * @return buffer of specified cache key, or null if not in cache</span> |
| <span class="source-line-no">613</span><span id="line-613"> */</span> |
| <span class="source-line-no">614</span><span id="line-614"> @Override</span> |
| <span class="source-line-no">615</span><span id="line-615"> public Cacheable getBlock(BlockCacheKey cacheKey, boolean caching, boolean repeat,</span> |
| <span class="source-line-no">616</span><span id="line-616"> boolean updateCacheMetrics) {</span> |
| <span class="source-line-no">617</span><span id="line-617"> LruCachedBlock cb = map.computeIfPresent(cacheKey, (key, val) -> {</span> |
| <span class="source-line-no">618</span><span id="line-618"> // It will be referenced by RPC path, so increase here. NOTICE: Must do the retain inside</span> |
| <span class="source-line-no">619</span><span id="line-619"> // this block. because if retain outside the map#computeIfPresent, the evictBlock may remove</span> |
| <span class="source-line-no">620</span><span id="line-620"> // the block and release, then we're retaining a block with refCnt=0 which is disallowed.</span> |
| <span class="source-line-no">621</span><span id="line-621"> // see HBASE-22422.</span> |
| <span class="source-line-no">622</span><span id="line-622"> val.getBuffer().retain();</span> |
| <span class="source-line-no">623</span><span id="line-623"> return val;</span> |
| <span class="source-line-no">624</span><span id="line-624"> });</span> |
| <span class="source-line-no">625</span><span id="line-625"> if (cb == null) {</span> |
| <span class="source-line-no">626</span><span id="line-626"> if (!repeat && updateCacheMetrics) {</span> |
| <span class="source-line-no">627</span><span id="line-627"> stats.miss(caching, cacheKey.isPrimary(), cacheKey.getBlockType());</span> |
| <span class="source-line-no">628</span><span id="line-628"> }</span> |
| <span class="source-line-no">629</span><span id="line-629"> // If there is another block cache then try and read there.</span> |
| <span class="source-line-no">630</span><span id="line-630"> // However if this is a retry ( second time in double checked locking )</span> |
| <span class="source-line-no">631</span><span id="line-631"> // And it's already a miss then the l2 will also be a miss.</span> |
| <span class="source-line-no">632</span><span id="line-632"> if (victimHandler != null && !repeat) {</span> |
| <span class="source-line-no">633</span><span id="line-633"> // The handler will increase result's refCnt for RPC, so need no extra retain.</span> |
| <span class="source-line-no">634</span><span id="line-634"> Cacheable result = victimHandler.getBlock(cacheKey, caching, repeat, updateCacheMetrics);</span> |
| <span class="source-line-no">635</span><span id="line-635"> // Promote this to L1.</span> |
| <span class="source-line-no">636</span><span id="line-636"> if (result != null) {</span> |
| <span class="source-line-no">637</span><span id="line-637"> if (caching) {</span> |
| <span class="source-line-no">638</span><span id="line-638"> cacheBlock(cacheKey, result, /* inMemory = */ false);</span> |
| <span class="source-line-no">639</span><span id="line-639"> }</span> |
| <span class="source-line-no">640</span><span id="line-640"> }</span> |
| <span class="source-line-no">641</span><span id="line-641"> return result;</span> |
| <span class="source-line-no">642</span><span id="line-642"> }</span> |
| <span class="source-line-no">643</span><span id="line-643"> return null;</span> |
| <span class="source-line-no">644</span><span id="line-644"> }</span> |
| <span class="source-line-no">645</span><span id="line-645"> if (updateCacheMetrics) {</span> |
| <span class="source-line-no">646</span><span id="line-646"> stats.hit(caching, cacheKey.isPrimary(), cacheKey.getBlockType());</span> |
| <span class="source-line-no">647</span><span id="line-647"> }</span> |
| <span class="source-line-no">648</span><span id="line-648"> cb.access(count.incrementAndGet());</span> |
| <span class="source-line-no">649</span><span id="line-649"> return cb.getBuffer();</span> |
| <span class="source-line-no">650</span><span id="line-650"> }</span> |
| <span class="source-line-no">651</span><span id="line-651"></span> |
| <span class="source-line-no">652</span><span id="line-652"> /**</span> |
| <span class="source-line-no">653</span><span id="line-653"> * Whether the cache contains block with specified cacheKey</span> |
| <span class="source-line-no">654</span><span id="line-654"> * @return true if contains the block</span> |
| <span class="source-line-no">655</span><span id="line-655"> */</span> |
| <span class="source-line-no">656</span><span id="line-656"> @Override</span> |
| <span class="source-line-no">657</span><span id="line-657"> public boolean containsBlock(BlockCacheKey cacheKey) {</span> |
| <span class="source-line-no">658</span><span id="line-658"> return map.containsKey(cacheKey);</span> |
| <span class="source-line-no">659</span><span id="line-659"> }</span> |
| <span class="source-line-no">660</span><span id="line-660"></span> |
| <span class="source-line-no">661</span><span id="line-661"> @Override</span> |
| <span class="source-line-no">662</span><span id="line-662"> public boolean evictBlock(BlockCacheKey cacheKey) {</span> |
| <span class="source-line-no">663</span><span id="line-663"> LruCachedBlock cb = map.get(cacheKey);</span> |
| <span class="source-line-no">664</span><span id="line-664"> return cb != null && evictBlock(cb, false) > 0;</span> |
| <span class="source-line-no">665</span><span id="line-665"> }</span> |
| <span class="source-line-no">666</span><span id="line-666"></span> |
| <span class="source-line-no">667</span><span id="line-667"> /**</span> |
| <span class="source-line-no">668</span><span id="line-668"> * Evicts all blocks for a specific HFile. This is an expensive operation implemented as a</span> |
| <span class="source-line-no">669</span><span id="line-669"> * linear-time search through all blocks in the cache. Ideally this should be a search in a</span> |
| <span class="source-line-no">670</span><span id="line-670"> * log-access-time map.</span> |
| <span class="source-line-no">671</span><span id="line-671"> * <p></span> |
| <span class="source-line-no">672</span><span id="line-672"> * This is used for evict-on-close to remove all blocks of a specific HFile.</span> |
| <span class="source-line-no">673</span><span id="line-673"> * @return the number of blocks evicted</span> |
| <span class="source-line-no">674</span><span id="line-674"> */</span> |
| <span class="source-line-no">675</span><span id="line-675"> @Override</span> |
| <span class="source-line-no">676</span><span id="line-676"> public int evictBlocksByHfileName(String hfileName) {</span> |
| <span class="source-line-no">677</span><span id="line-677"> int numEvicted = (int) map.keySet().stream().filter(key -> key.getHfileName().equals(hfileName))</span> |
| <span class="source-line-no">678</span><span id="line-678"> .filter(this::evictBlock).count();</span> |
| <span class="source-line-no">679</span><span id="line-679"> if (victimHandler != null) {</span> |
| <span class="source-line-no">680</span><span id="line-680"> numEvicted += victimHandler.evictBlocksByHfileName(hfileName);</span> |
| <span class="source-line-no">681</span><span id="line-681"> }</span> |
| <span class="source-line-no">682</span><span id="line-682"> return numEvicted;</span> |
| <span class="source-line-no">683</span><span id="line-683"> }</span> |
| <span class="source-line-no">684</span><span id="line-684"></span> |
| <span class="source-line-no">685</span><span id="line-685"> /**</span> |
| <span class="source-line-no">686</span><span id="line-686"> * Evict the block, and it will be cached by the victim handler if exists &amp;&amp; block may be</span> |
| <span class="source-line-no">687</span><span id="line-687"> * read again later</span> |
| <span class="source-line-no">688</span><span id="line-688"> * @param evictedByEvictionProcess true if the given block is evicted by EvictionThread</span> |
| <span class="source-line-no">689</span><span id="line-689"> * @return the heap size of evicted block</span> |
| <span class="source-line-no">690</span><span id="line-690"> */</span> |
| <span class="source-line-no">691</span><span id="line-691"> protected long evictBlock(LruCachedBlock block, boolean evictedByEvictionProcess) {</span> |
| <span class="source-line-no">692</span><span id="line-692"> LruCachedBlock previous = map.remove(block.getCacheKey());</span> |
| <span class="source-line-no">693</span><span id="line-693"> if (previous == null) {</span> |
| <span class="source-line-no">694</span><span id="line-694"> return 0;</span> |
| <span class="source-line-no">695</span><span id="line-695"> }</span> |
| <span class="source-line-no">696</span><span id="line-696"> updateSizeMetrics(block, true);</span> |
| <span class="source-line-no">697</span><span id="line-697"> long val = elements.decrementAndGet();</span> |
| <span class="source-line-no">698</span><span id="line-698"> if (LOG.isTraceEnabled()) {</span> |
| <span class="source-line-no">699</span><span id="line-699"> long size = map.size();</span> |
| <span class="source-line-no">700</span><span id="line-700"> assertCounterSanity(size, val);</span> |
| <span class="source-line-no">701</span><span id="line-701"> }</span> |
| <span class="source-line-no">702</span><span id="line-702"> if (block.getBuffer().getBlockType().isData()) {</span> |
| <span class="source-line-no">703</span><span id="line-703"> dataBlockElements.decrement();</span> |
| <span class="source-line-no">704</span><span id="line-704"> }</span> |
| <span class="source-line-no">705</span><span id="line-705"> if (evictedByEvictionProcess) {</span> |
| <span class="source-line-no">706</span><span id="line-706"> // When the eviction of the block happened because of invalidation of HFiles, no need to</span> |
| <span class="source-line-no">707</span><span id="line-707"> // update the stats counter.</span> |
| <span class="source-line-no">708</span><span id="line-708"> stats.evicted(block.getCachedTime(), block.getCacheKey().isPrimary());</span> |
| <span class="source-line-no">709</span><span id="line-709"> if (victimHandler != null) {</span> |
| <span class="source-line-no">710</span><span id="line-710"> victimHandler.cacheBlock(block.getCacheKey(), block.getBuffer());</span> |
| <span class="source-line-no">711</span><span id="line-711"> }</span> |
| <span class="source-line-no">712</span><span id="line-712"> }</span> |
| <span class="source-line-no">713</span><span id="line-713"> // Decrease the block's reference count, and if refCount is 0, then it'll auto-deallocate. DO</span> |
| <span class="source-line-no">714</span><span id="line-714"> // NOT move this up because if do that then the victimHandler may access the buffer with</span> |
| <span class="source-line-no">715</span><span id="line-715"> // refCnt = 0 which is disallowed.</span> |
| <span class="source-line-no">716</span><span id="line-716"> previous.getBuffer().release();</span> |
| <span class="source-line-no">717</span><span id="line-717"> return block.heapSize();</span> |
| <span class="source-line-no">718</span><span id="line-718"> }</span> |
| <span class="source-line-no">719</span><span id="line-719"></span> |
| <span class="source-line-no">720</span><span id="line-720"> /**</span> |
| <span class="source-line-no">721</span><span id="line-721"> * Multi-threaded call to run the eviction process.</span> |
| <span class="source-line-no">722</span><span id="line-722"> */</span> |
| <span class="source-line-no">723</span><span id="line-723"> private void runEviction() {</span> |
| <span class="source-line-no">724</span><span id="line-724"> if (evictionThread == null) {</span> |
| <span class="source-line-no">725</span><span id="line-725"> evict();</span> |
| <span class="source-line-no">726</span><span id="line-726"> } else {</span> |
| <span class="source-line-no">727</span><span id="line-727"> evictionThread.evict();</span> |
| <span class="source-line-no">728</span><span id="line-728"> }</span> |
| <span class="source-line-no">729</span><span id="line-729"> }</span> |
| <span class="source-line-no">730</span><span id="line-730"></span> |
| <span class="source-line-no">731</span><span id="line-731"> boolean isEvictionInProgress() {</span> |
| <span class="source-line-no">732</span><span id="line-732"> return evictionInProgress;</span> |
| <span class="source-line-no">733</span><span id="line-733"> }</span> |
| <span class="source-line-no">734</span><span id="line-734"></span> |
| <span class="source-line-no">735</span><span id="line-735"> long getOverhead() {</span> |
| <span class="source-line-no">736</span><span id="line-736"> return overhead;</span> |
| <span class="source-line-no">737</span><span id="line-737"> }</span> |
| <span class="source-line-no">738</span><span id="line-738"></span> |
| <span class="source-line-no">739</span><span id="line-739"> /**</span> |
| <span class="source-line-no">740</span><span id="line-740"> * Eviction method. Evict items in order of use, allowing delete items which haven't been used for</span> |
| <span class="source-line-no">741</span><span id="line-741"> * the longest amount of time.</span> |
| <span class="source-line-no">742</span><span id="line-742"> * @return how many bytes were freed</span> |
| <span class="source-line-no">743</span><span id="line-743"> */</span> |
| <span class="source-line-no">744</span><span id="line-744"> long evict() {</span> |
| <span class="source-line-no">745</span><span id="line-745"></span> |
| <span class="source-line-no">746</span><span id="line-746"> // Ensure only one eviction at a time</span> |
| <span class="source-line-no">747</span><span id="line-747"> if (!evictionLock.tryLock()) {</span> |
| <span class="source-line-no">748</span><span id="line-748"> return 0;</span> |
| <span class="source-line-no">749</span><span id="line-749"> }</span> |
| <span class="source-line-no">750</span><span id="line-750"></span> |
| <span class="source-line-no">751</span><span id="line-751"> long bytesToFree = 0L;</span> |
| <span class="source-line-no">752</span><span id="line-752"></span> |
| <span class="source-line-no">753</span><span id="line-753"> try {</span> |
| <span class="source-line-no">754</span><span id="line-754"> evictionInProgress = true;</span> |
| <span class="source-line-no">755</span><span id="line-755"> long currentSize = this.size.get();</span> |
| <span class="source-line-no">756</span><span id="line-756"> bytesToFree = currentSize - minSize();</span> |
| <span class="source-line-no">757</span><span id="line-757"></span> |
| <span class="source-line-no">758</span><span id="line-758"> if (LOG.isTraceEnabled()) {</span> |
| <span class="source-line-no">759</span><span id="line-759"> LOG.trace("Block cache LRU eviction started; Attempting to free "</span> |
| <span class="source-line-no">760</span><span id="line-760"> + StringUtils.byteDesc(bytesToFree) + " of total=" + StringUtils.byteDesc(currentSize));</span> |
| <span class="source-line-no">761</span><span id="line-761"> }</span> |
| <span class="source-line-no">762</span><span id="line-762"></span> |
| <span class="source-line-no">763</span><span id="line-763"> if (bytesToFree <= 0) {</span> |
| <span class="source-line-no">764</span><span id="line-764"> return 0;</span> |
| <span class="source-line-no">765</span><span id="line-765"> }</span> |
| <span class="source-line-no">766</span><span id="line-766"></span> |
| <span class="source-line-no">767</span><span id="line-767"> // Instantiate priority buckets</span> |
| <span class="source-line-no">768</span><span id="line-768"> BlockBucket bucketSingle = new BlockBucket("single", bytesToFree, blockSize, singleSize());</span> |
| <span class="source-line-no">769</span><span id="line-769"> BlockBucket bucketMulti = new BlockBucket("multi", bytesToFree, blockSize, multiSize());</span> |
| <span class="source-line-no">770</span><span id="line-770"> BlockBucket bucketMemory = new BlockBucket("memory", bytesToFree, blockSize, memorySize());</span> |
| <span class="source-line-no">771</span><span id="line-771"></span> |
| <span class="source-line-no">772</span><span id="line-772"> // Scan entire map putting into appropriate buckets</span> |
| <span class="source-line-no">773</span><span id="line-773"> for (LruCachedBlock cachedBlock : map.values()) {</span> |
| <span class="source-line-no">774</span><span id="line-774"> switch (cachedBlock.getPriority()) {</span> |
| <span class="source-line-no">775</span><span id="line-775"> case SINGLE: {</span> |
| <span class="source-line-no">776</span><span id="line-776"> bucketSingle.add(cachedBlock);</span> |
| <span class="source-line-no">777</span><span id="line-777"> break;</span> |
| <span class="source-line-no">778</span><span id="line-778"> }</span> |
| <span class="source-line-no">779</span><span id="line-779"> case MULTI: {</span> |
| <span class="source-line-no">780</span><span id="line-780"> bucketMulti.add(cachedBlock);</span> |
| <span class="source-line-no">781</span><span id="line-781"> break;</span> |
| <span class="source-line-no">782</span><span id="line-782"> }</span> |
| <span class="source-line-no">783</span><span id="line-783"> case MEMORY: {</span> |
| <span class="source-line-no">784</span><span id="line-784"> bucketMemory.add(cachedBlock);</span> |
| <span class="source-line-no">785</span><span id="line-785"> break;</span> |
| <span class="source-line-no">786</span><span id="line-786"> }</span> |
| <span class="source-line-no">787</span><span id="line-787"> }</span> |
| <span class="source-line-no">788</span><span id="line-788"> }</span> |
| <span class="source-line-no">789</span><span id="line-789"></span> |
| <span class="source-line-no">790</span><span id="line-790"> long bytesFreed = 0;</span> |
| <span class="source-line-no">791</span><span id="line-791"> if (forceInMemory || memoryFactor > 0.999f) {</span> |
| <span class="source-line-no">792</span><span id="line-792"> long s = bucketSingle.totalSize();</span> |
| <span class="source-line-no">793</span><span id="line-793"> long m = bucketMulti.totalSize();</span> |
| <span class="source-line-no">794</span><span id="line-794"> if (bytesToFree > (s + m)) {</span> |
| <span class="source-line-no">795</span><span id="line-795"> // this means we need to evict blocks in memory bucket to make room,</span> |
| <span class="source-line-no">796</span><span id="line-796"> // so the single and multi buckets will be emptied</span> |
| <span class="source-line-no">797</span><span id="line-797"> bytesFreed = bucketSingle.free(s);</span> |
| <span class="source-line-no">798</span><span id="line-798"> bytesFreed += bucketMulti.free(m);</span> |
| <span class="source-line-no">799</span><span id="line-799"> if (LOG.isTraceEnabled()) {</span> |
| <span class="source-line-no">800</span><span id="line-800"> LOG.trace(</span> |
| <span class="source-line-no">801</span><span id="line-801"> "freed " + StringUtils.byteDesc(bytesFreed) + " from single and multi buckets");</span> |
| <span class="source-line-no">802</span><span id="line-802"> }</span> |
| <span class="source-line-no">803</span><span id="line-803"> bytesFreed += bucketMemory.free(bytesToFree - bytesFreed);</span> |
| <span class="source-line-no">804</span><span id="line-804"> if (LOG.isTraceEnabled()) {</span> |
| <span class="source-line-no">805</span><span id="line-805"> LOG.trace(</span> |
| <span class="source-line-no">806</span><span id="line-806"> "freed " + StringUtils.byteDesc(bytesFreed) + " total from all three buckets ");</span> |
| <span class="source-line-no">807</span><span id="line-807"> }</span> |
| <span class="source-line-no">808</span><span id="line-808"> } else {</span> |
| <span class="source-line-no">809</span><span id="line-809"> // this means no need to evict block in memory bucket,</span> |
| <span class="source-line-no">810</span><span id="line-810"> // and we try best to make the ratio between single-bucket and</span> |
| <span class="source-line-no">811</span><span id="line-811"> // multi-bucket is 1:2</span> |
| <span class="source-line-no">812</span><span id="line-812"> long bytesRemain = s + m - bytesToFree;</span> |
| <span class="source-line-no">813</span><span id="line-813"> if (3 * s <= bytesRemain) {</span> |
| <span class="source-line-no">814</span><span id="line-814"> // single-bucket is small enough that no eviction happens for it</span> |
| <span class="source-line-no">815</span><span id="line-815"> // hence all eviction goes from multi-bucket</span> |
| <span class="source-line-no">816</span><span id="line-816"> bytesFreed = bucketMulti.free(bytesToFree);</span> |
| <span class="source-line-no">817</span><span id="line-817"> } else if (3 * m <= 2 * bytesRemain) {</span> |
| <span class="source-line-no">818</span><span id="line-818"> // multi-bucket is small enough that no eviction happens for it</span> |
| <span class="source-line-no">819</span><span id="line-819"> // hence all eviction goes from single-bucket</span> |
| <span class="source-line-no">820</span><span id="line-820"> bytesFreed = bucketSingle.free(bytesToFree);</span> |
| <span class="source-line-no">821</span><span id="line-821"> } else {</span> |
| <span class="source-line-no">822</span><span id="line-822"> // both buckets need to evict some blocks</span> |
| <span class="source-line-no">823</span><span id="line-823"> bytesFreed = bucketSingle.free(s - bytesRemain / 3);</span> |
| <span class="source-line-no">824</span><span id="line-824"> if (bytesFreed < bytesToFree) {</span> |
| <span class="source-line-no">825</span><span id="line-825"> bytesFreed += bucketMulti.free(bytesToFree - bytesFreed);</span> |
| <span class="source-line-no">826</span><span id="line-826"> }</span> |
| <span class="source-line-no">827</span><span id="line-827"> }</span> |
| <span class="source-line-no">828</span><span id="line-828"> }</span> |
| <span class="source-line-no">829</span><span id="line-829"> } else {</span> |
| <span class="source-line-no">830</span><span id="line-830"> PriorityQueue<BlockBucket> bucketQueue = new PriorityQueue<>(3);</span> |
| <span class="source-line-no">831</span><span id="line-831"></span> |
| <span class="source-line-no">832</span><span id="line-832"> bucketQueue.add(bucketSingle);</span> |
| <span class="source-line-no">833</span><span id="line-833"> bucketQueue.add(bucketMulti);</span> |
| <span class="source-line-no">834</span><span id="line-834"> bucketQueue.add(bucketMemory);</span> |
| <span class="source-line-no">835</span><span id="line-835"></span> |
| <span class="source-line-no">836</span><span id="line-836"> int remainingBuckets = bucketQueue.size();</span> |
| <span class="source-line-no">837</span><span id="line-837"></span> |
| <span class="source-line-no">838</span><span id="line-838"> BlockBucket bucket;</span> |
| <span class="source-line-no">839</span><span id="line-839"> while ((bucket = bucketQueue.poll()) != null) {</span> |
| <span class="source-line-no">840</span><span id="line-840"> long overflow = bucket.overflow();</span> |
| <span class="source-line-no">841</span><span id="line-841"> if (overflow > 0) {</span> |
| <span class="source-line-no">842</span><span id="line-842"> long bucketBytesToFree =</span> |
| <span class="source-line-no">843</span><span id="line-843"> Math.min(overflow, (bytesToFree - bytesFreed) / remainingBuckets);</span> |
| <span class="source-line-no">844</span><span id="line-844"> bytesFreed += bucket.free(bucketBytesToFree);</span> |
| <span class="source-line-no">845</span><span id="line-845"> }</span> |
| <span class="source-line-no">846</span><span id="line-846"> remainingBuckets--;</span> |
| <span class="source-line-no">847</span><span id="line-847"> }</span> |
| <span class="source-line-no">848</span><span id="line-848"> }</span> |
| <span class="source-line-no">849</span><span id="line-849"> if (LOG.isTraceEnabled()) {</span> |
| <span class="source-line-no">850</span><span id="line-850"> long single = bucketSingle.totalSize();</span> |
| <span class="source-line-no">851</span><span id="line-851"> long multi = bucketMulti.totalSize();</span> |
| <span class="source-line-no">852</span><span id="line-852"> long memory = bucketMemory.totalSize();</span> |
| <span class="source-line-no">853</span><span id="line-853"> LOG.trace(</span> |
| <span class="source-line-no">854</span><span id="line-854"> "Block cache LRU eviction completed; " + "freed=" + StringUtils.byteDesc(bytesFreed)</span> |
| <span class="source-line-no">855</span><span id="line-855"> + ", " + "total=" + StringUtils.byteDesc(this.size.get()) + ", " + "single="</span> |
| <span class="source-line-no">856</span><span id="line-856"> + StringUtils.byteDesc(single) + ", " + "multi=" + StringUtils.byteDesc(multi) + ", "</span> |
| <span class="source-line-no">857</span><span id="line-857"> + "memory=" + StringUtils.byteDesc(memory));</span> |
| <span class="source-line-no">858</span><span id="line-858"> }</span> |
| <span class="source-line-no">859</span><span id="line-859"> } finally {</span> |
| <span class="source-line-no">860</span><span id="line-860"> stats.evict();</span> |
| <span class="source-line-no">861</span><span id="line-861"> evictionInProgress = false;</span> |
| <span class="source-line-no">862</span><span id="line-862"> evictionLock.unlock();</span> |
| <span class="source-line-no">863</span><span id="line-863"> }</span> |
| <span class="source-line-no">864</span><span id="line-864"> return bytesToFree;</span> |
| <span class="source-line-no">865</span><span id="line-865"> }</span> |
| <span class="source-line-no">866</span><span id="line-866"></span> |
| <span class="source-line-no">867</span><span id="line-867"> @Override</span> |
| <span class="source-line-no">868</span><span id="line-868"> public String toString() {</span> |
| <span class="source-line-no">869</span><span id="line-869"> return MoreObjects.toStringHelper(this).add("blockCount", getBlockCount())</span> |
| <span class="source-line-no">870</span><span id="line-870"> .add("currentSize", StringUtils.byteDesc(getCurrentSize()))</span> |
| <span class="source-line-no">871</span><span id="line-871"> .add("freeSize", StringUtils.byteDesc(getFreeSize()))</span> |
| <span class="source-line-no">872</span><span id="line-872"> .add("maxSize", StringUtils.byteDesc(getMaxSize()))</span> |
| <span class="source-line-no">873</span><span id="line-873"> .add("heapSize", StringUtils.byteDesc(heapSize()))</span> |
| <span class="source-line-no">874</span><span id="line-874"> .add("minSize", StringUtils.byteDesc(minSize())).add("minFactor", minFactor)</span> |
| <span class="source-line-no">875</span><span id="line-875"> .add("multiSize", StringUtils.byteDesc(multiSize())).add("multiFactor", multiFactor)</span> |
| <span class="source-line-no">876</span><span id="line-876"> .add("singleSize", StringUtils.byteDesc(singleSize())).add("singleFactor", singleFactor)</span> |
| <span class="source-line-no">877</span><span id="line-877"> .toString();</span> |
| <span class="source-line-no">878</span><span id="line-878"> }</span> |
| <span class="source-line-no">879</span><span id="line-879"></span> |
| <span class="source-line-no">880</span><span id="line-880"> /**</span> |
| <span class="source-line-no">881</span><span id="line-881"> * Used to group blocks into priority buckets. There will be a BlockBucket for each priority</span> |
| <span class="source-line-no">882</span><span id="line-882"> * (single, multi, memory). Once bucketed, the eviction algorithm takes the appropriate number of</span> |
| <span class="source-line-no">883</span><span id="line-883"> * elements out of each according to configuration parameters and their relatives sizes.</span> |
| <span class="source-line-no">884</span><span id="line-884"> */</span> |
| <span class="source-line-no">885</span><span id="line-885"> private class BlockBucket implements Comparable<BlockBucket> {</span> |
| <span class="source-line-no">886</span><span id="line-886"></span> |
| <span class="source-line-no">887</span><span id="line-887"> private final String name;</span> |
| <span class="source-line-no">888</span><span id="line-888"> private final LruCachedBlockQueue queue;</span> |
| <span class="source-line-no">889</span><span id="line-889"> private long totalSize = 0;</span> |
| <span class="source-line-no">890</span><span id="line-890"> private final long bucketSize;</span> |
| <span class="source-line-no">891</span><span id="line-891"></span> |
| <span class="source-line-no">892</span><span id="line-892"> public BlockBucket(String name, long bytesToFree, long blockSize, long bucketSize) {</span> |
| <span class="source-line-no">893</span><span id="line-893"> this.name = name;</span> |
| <span class="source-line-no">894</span><span id="line-894"> this.bucketSize = bucketSize;</span> |
| <span class="source-line-no">895</span><span id="line-895"> queue = new LruCachedBlockQueue(bytesToFree, blockSize);</span> |
| <span class="source-line-no">896</span><span id="line-896"> totalSize = 0;</span> |
| <span class="source-line-no">897</span><span id="line-897"> }</span> |
| <span class="source-line-no">898</span><span id="line-898"></span> |
| <span class="source-line-no">899</span><span id="line-899"> public void add(LruCachedBlock block) {</span> |
| <span class="source-line-no">900</span><span id="line-900"> totalSize += block.heapSize();</span> |
| <span class="source-line-no">901</span><span id="line-901"> queue.add(block);</span> |
| <span class="source-line-no">902</span><span id="line-902"> }</span> |
| <span class="source-line-no">903</span><span id="line-903"></span> |
| <span class="source-line-no">904</span><span id="line-904"> public long free(long toFree) {</span> |
| <span class="source-line-no">905</span><span id="line-905"> if (LOG.isTraceEnabled()) {</span> |
| <span class="source-line-no">906</span><span id="line-906"> LOG.trace("freeing {} from {}", StringUtils.byteDesc(toFree), this);</span> |
| <span class="source-line-no">907</span><span id="line-907"> }</span> |
| <span class="source-line-no">908</span><span id="line-908"> LruCachedBlock cb;</span> |
| <span class="source-line-no">909</span><span id="line-909"> long freedBytes = 0;</span> |
| <span class="source-line-no">910</span><span id="line-910"> while ((cb = queue.pollLast()) != null) {</span> |
| <span class="source-line-no">911</span><span id="line-911"> freedBytes += evictBlock(cb, true);</span> |
| <span class="source-line-no">912</span><span id="line-912"> if (freedBytes >= toFree) {</span> |
| <span class="source-line-no">913</span><span id="line-913"> return freedBytes;</span> |
| <span class="source-line-no">914</span><span id="line-914"> }</span> |
| <span class="source-line-no">915</span><span id="line-915"> }</span> |
| <span class="source-line-no">916</span><span id="line-916"> if (LOG.isTraceEnabled()) {</span> |
| <span class="source-line-no">917</span><span id="line-917"> LOG.trace("freeing {} from {}", StringUtils.byteDesc(toFree), this);</span> |
| <span class="source-line-no">918</span><span id="line-918"> }</span> |
| <span class="source-line-no">919</span><span id="line-919"> return freedBytes;</span> |
| <span class="source-line-no">920</span><span id="line-920"> }</span> |
| <span class="source-line-no">921</span><span id="line-921"></span> |
| <span class="source-line-no">922</span><span id="line-922"> public long overflow() {</span> |
| <span class="source-line-no">923</span><span id="line-923"> return totalSize - bucketSize;</span> |
| <span class="source-line-no">924</span><span id="line-924"> }</span> |
| <span class="source-line-no">925</span><span id="line-925"></span> |
| <span class="source-line-no">926</span><span id="line-926"> public long totalSize() {</span> |
| <span class="source-line-no">927</span><span id="line-927"> return totalSize;</span> |
| <span class="source-line-no">928</span><span id="line-928"> }</span> |
| <span class="source-line-no">929</span><span id="line-929"></span> |
| <span class="source-line-no">930</span><span id="line-930"> @Override</span> |
| <span class="source-line-no">931</span><span id="line-931"> public int compareTo(BlockBucket that) {</span> |
| <span class="source-line-no">932</span><span id="line-932"> return Long.compare(this.overflow(), that.overflow());</span> |
| <span class="source-line-no">933</span><span id="line-933"> }</span> |
| <span class="source-line-no">934</span><span id="line-934"></span> |
| <span class="source-line-no">935</span><span id="line-935"> @Override</span> |
| <span class="source-line-no">936</span><span id="line-936"> public boolean equals(Object that) {</span> |
| <span class="source-line-no">937</span><span id="line-937"> if (!(that instanceof BlockBucket)) {</span> |
| <span class="source-line-no">938</span><span id="line-938"> return false;</span> |
| <span class="source-line-no">939</span><span id="line-939"> }</span> |
| <span class="source-line-no">940</span><span id="line-940"> return compareTo((BlockBucket) that) == 0;</span> |
| <span class="source-line-no">941</span><span id="line-941"> }</span> |
| <span class="source-line-no">942</span><span id="line-942"></span> |
| <span class="source-line-no">943</span><span id="line-943"> @Override</span> |
| <span class="source-line-no">944</span><span id="line-944"> public int hashCode() {</span> |
| <span class="source-line-no">945</span><span id="line-945"> return Objects.hashCode(name, bucketSize, queue, totalSize);</span> |
| <span class="source-line-no">946</span><span id="line-946"> }</span> |
| <span class="source-line-no">947</span><span id="line-947"></span> |
| <span class="source-line-no">948</span><span id="line-948"> @Override</span> |
| <span class="source-line-no">949</span><span id="line-949"> public String toString() {</span> |
| <span class="source-line-no">950</span><span id="line-950"> return MoreObjects.toStringHelper(this).add("name", name)</span> |
| <span class="source-line-no">951</span><span id="line-951"> .add("totalSize", StringUtils.byteDesc(totalSize))</span> |
| <span class="source-line-no">952</span><span id="line-952"> .add("bucketSize", StringUtils.byteDesc(bucketSize)).toString();</span> |
| <span class="source-line-no">953</span><span id="line-953"> }</span> |
| <span class="source-line-no">954</span><span id="line-954"> }</span> |
| <span class="source-line-no">955</span><span id="line-955"></span> |
| <span class="source-line-no">956</span><span id="line-956"> /**</span> |
| <span class="source-line-no">957</span><span id="line-957"> * Get the maximum size of this cache.</span> |
| <span class="source-line-no">958</span><span id="line-958"> * @return max size in bytes</span> |
| <span class="source-line-no">959</span><span id="line-959"> */</span> |
| <span class="source-line-no">960</span><span id="line-960"></span> |
| <span class="source-line-no">961</span><span id="line-961"> @Override</span> |
| <span class="source-line-no">962</span><span id="line-962"> public long getMaxSize() {</span> |
| <span class="source-line-no">963</span><span id="line-963"> return this.maxSize;</span> |
| <span class="source-line-no">964</span><span id="line-964"> }</span> |
| <span class="source-line-no">965</span><span id="line-965"></span> |
| <span class="source-line-no">966</span><span id="line-966"> @Override</span> |
| <span class="source-line-no">967</span><span id="line-967"> public long getCurrentSize() {</span> |
| <span class="source-line-no">968</span><span id="line-968"> return this.size.get();</span> |
| <span class="source-line-no">969</span><span id="line-969"> }</span> |
| <span class="source-line-no">970</span><span id="line-970"></span> |
| <span class="source-line-no">971</span><span id="line-971"> @Override</span> |
| <span class="source-line-no">972</span><span id="line-972"> public long getCurrentDataSize() {</span> |
| <span class="source-line-no">973</span><span id="line-973"> return this.dataBlockSize.sum();</span> |
| <span class="source-line-no">974</span><span id="line-974"> }</span> |
| <span class="source-line-no">975</span><span id="line-975"></span> |
| <span class="source-line-no">976</span><span id="line-976"> @Override</span> |
| <span class="source-line-no">977</span><span id="line-977"> public long getFreeSize() {</span> |
| <span class="source-line-no">978</span><span id="line-978"> return getMaxSize() - getCurrentSize();</span> |
| <span class="source-line-no">979</span><span id="line-979"> }</span> |
| <span class="source-line-no">980</span><span id="line-980"></span> |
| <span class="source-line-no">981</span><span id="line-981"> @Override</span> |
| <span class="source-line-no">982</span><span id="line-982"> public long size() {</span> |
| <span class="source-line-no">983</span><span id="line-983"> return getMaxSize();</span> |
| <span class="source-line-no">984</span><span id="line-984"> }</span> |
| <span class="source-line-no">985</span><span id="line-985"></span> |
| <span class="source-line-no">986</span><span id="line-986"> @Override</span> |
| <span class="source-line-no">987</span><span id="line-987"> public long getBlockCount() {</span> |
| <span class="source-line-no">988</span><span id="line-988"> return this.elements.get();</span> |
| <span class="source-line-no">989</span><span id="line-989"> }</span> |
| <span class="source-line-no">990</span><span id="line-990"></span> |
| <span class="source-line-no">991</span><span id="line-991"> @Override</span> |
| <span class="source-line-no">992</span><span id="line-992"> public long getDataBlockCount() {</span> |
| <span class="source-line-no">993</span><span id="line-993"> return this.dataBlockElements.sum();</span> |
| <span class="source-line-no">994</span><span id="line-994"> }</span> |
| <span class="source-line-no">995</span><span id="line-995"></span> |
| <span class="source-line-no">996</span><span id="line-996"> EvictionThread getEvictionThread() {</span> |
| <span class="source-line-no">997</span><span id="line-997"> return this.evictionThread;</span> |
| <span class="source-line-no">998</span><span id="line-998"> }</span> |
| <span class="source-line-no">999</span><span id="line-999"></span> |
| <span class="source-line-no">1000</span><span id="line-1000"> /*</span> |
| <span class="source-line-no">1001</span><span id="line-1001"> * Eviction thread. Sits in waiting state until an eviction is triggered when the cache size grows</span> |
| <span class="source-line-no">1002</span><span id="line-1002"> * above the acceptable level.<p> Thread is triggered into action by {@link</span> |
| <span class="source-line-no">1003</span><span id="line-1003"> * LruAdaptiveBlockCache#runEviction()}</span> |
| <span class="source-line-no">1004</span><span id="line-1004"> */</span> |
| <span class="source-line-no">1005</span><span id="line-1005"> static class EvictionThread extends Thread {</span> |
| <span class="source-line-no">1006</span><span id="line-1006"></span> |
| <span class="source-line-no">1007</span><span id="line-1007"> private WeakReference<LruAdaptiveBlockCache> cache;</span> |
| <span class="source-line-no">1008</span><span id="line-1008"> private volatile boolean go = true;</span> |
| <span class="source-line-no">1009</span><span id="line-1009"> // flag set after enter the run method, used for test</span> |
| <span class="source-line-no">1010</span><span id="line-1010"> private boolean enteringRun = false;</span> |
| <span class="source-line-no">1011</span><span id="line-1011"></span> |
| <span class="source-line-no">1012</span><span id="line-1012"> public EvictionThread(LruAdaptiveBlockCache cache) {</span> |
| <span class="source-line-no">1013</span><span id="line-1013"> super(Thread.currentThread().getName() + ".LruAdaptiveBlockCache.EvictionThread");</span> |
| <span class="source-line-no">1014</span><span id="line-1014"> setDaemon(true);</span> |
| <span class="source-line-no">1015</span><span id="line-1015"> this.cache = new WeakReference<>(cache);</span> |
| <span class="source-line-no">1016</span><span id="line-1016"> }</span> |
| <span class="source-line-no">1017</span><span id="line-1017"></span> |
| <span class="source-line-no">1018</span><span id="line-1018"> @Override</span> |
| <span class="source-line-no">1019</span><span id="line-1019"> public void run() {</span> |
| <span class="source-line-no">1020</span><span id="line-1020"> enteringRun = true;</span> |
| <span class="source-line-no">1021</span><span id="line-1021"> long freedSumMb = 0;</span> |
| <span class="source-line-no">1022</span><span id="line-1022"> int heavyEvictionCount = 0;</span> |
| <span class="source-line-no">1023</span><span id="line-1023"> int freedDataOverheadPercent = 0;</span> |
| <span class="source-line-no">1024</span><span id="line-1024"> long startTime = EnvironmentEdgeManager.currentTime();</span> |
| <span class="source-line-no">1025</span><span id="line-1025"> while (this.go) {</span> |
| <span class="source-line-no">1026</span><span id="line-1026"> synchronized (this) {</span> |
| <span class="source-line-no">1027</span><span id="line-1027"> try {</span> |
| <span class="source-line-no">1028</span><span id="line-1028"> this.wait(1000 * 10/* Don't wait for ever */);</span> |
| <span class="source-line-no">1029</span><span id="line-1029"> } catch (InterruptedException e) {</span> |
| <span class="source-line-no">1030</span><span id="line-1030"> LOG.warn("Interrupted eviction thread ", e);</span> |
| <span class="source-line-no">1031</span><span id="line-1031"> Thread.currentThread().interrupt();</span> |
| <span class="source-line-no">1032</span><span id="line-1032"> }</span> |
| <span class="source-line-no">1033</span><span id="line-1033"> }</span> |
| <span class="source-line-no">1034</span><span id="line-1034"> LruAdaptiveBlockCache cache = this.cache.get();</span> |
| <span class="source-line-no">1035</span><span id="line-1035"> if (cache == null) {</span> |
| <span class="source-line-no">1036</span><span id="line-1036"> break;</span> |
| <span class="source-line-no">1037</span><span id="line-1037"> }</span> |
| <span class="source-line-no">1038</span><span id="line-1038"> freedSumMb += cache.evict() / 1024 / 1024;</span> |
| <span class="source-line-no">1039</span><span id="line-1039"> /*</span> |
| <span class="source-line-no">1040</span><span id="line-1040"> * Sometimes we are reading more data than can fit into BlockCache and it is the cause a</span> |
| <span class="source-line-no">1041</span><span id="line-1041"> * high rate of evictions. This in turn leads to heavy Garbage Collector works. So a lot of</span> |
| <span class="source-line-no">1042</span><span id="line-1042"> * blocks put into BlockCache but never read, but spending a lot of CPU resources. Here we</span> |
| <span class="source-line-no">1043</span><span id="line-1043"> * will analyze how many bytes were freed and decide decide whether the time has come to</span> |
| <span class="source-line-no">1044</span><span id="line-1044"> * reduce amount of caching blocks. It help avoid put too many blocks into BlockCache when</span> |
| <span class="source-line-no">1045</span><span id="line-1045"> * evict() works very active and save CPU for other jobs. More delails:</span> |
| <span class="source-line-no">1046</span><span id="line-1046"> * https://issues.apache.org/jira/browse/HBASE-23887</span> |
| <span class="source-line-no">1047</span><span id="line-1047"> */</span> |
| <span class="source-line-no">1048</span><span id="line-1048"></span> |
| <span class="source-line-no">1049</span><span id="line-1049"> // First of all we have to control how much time</span> |
| <span class="source-line-no">1050</span><span id="line-1050"> // has passed since previuos evict() was launched</span> |
| <span class="source-line-no">1051</span><span id="line-1051"> // This is should be almost the same time (+/- 10s)</span> |
| <span class="source-line-no">1052</span><span id="line-1052"> // because we get comparable volumes of freed bytes each time.</span> |
| <span class="source-line-no">1053</span><span id="line-1053"> // 10s because this is default period to run evict() (see above this.wait)</span> |
| <span class="source-line-no">1054</span><span id="line-1054"> long stopTime = EnvironmentEdgeManager.currentTime();</span> |
| <span class="source-line-no">1055</span><span id="line-1055"> if ((stopTime - startTime) > 1000 * 10 - 1) {</span> |
| <span class="source-line-no">1056</span><span id="line-1056"> // Here we have to calc what situation we have got.</span> |
| <span class="source-line-no">1057</span><span id="line-1057"> // We have the limit "hbase.lru.cache.heavy.eviction.bytes.size.limit"</span> |
| <span class="source-line-no">1058</span><span id="line-1058"> // and can calculte overhead on it.</span> |
| <span class="source-line-no">1059</span><span id="line-1059"> // We will use this information to decide,</span> |
| <span class="source-line-no">1060</span><span id="line-1060"> // how to change percent of caching blocks.</span> |
| <span class="source-line-no">1061</span><span id="line-1061"> freedDataOverheadPercent =</span> |
| <span class="source-line-no">1062</span><span id="line-1062"> (int) (freedSumMb * 100 / cache.heavyEvictionMbSizeLimit) - 100;</span> |
| <span class="source-line-no">1063</span><span id="line-1063"> if (freedSumMb > cache.heavyEvictionMbSizeLimit) {</span> |
| <span class="source-line-no">1064</span><span id="line-1064"> // Now we are in the situation when we are above the limit</span> |
| <span class="source-line-no">1065</span><span id="line-1065"> // But maybe we are going to ignore it because it will end quite soon</span> |
| <span class="source-line-no">1066</span><span id="line-1066"> heavyEvictionCount++;</span> |
| <span class="source-line-no">1067</span><span id="line-1067"> if (heavyEvictionCount > cache.heavyEvictionCountLimit) {</span> |
| <span class="source-line-no">1068</span><span id="line-1068"> // It is going for a long time and we have to reduce of caching</span> |
| <span class="source-line-no">1069</span><span id="line-1069"> // blocks now. So we calculate here how many blocks we want to skip.</span> |
| <span class="source-line-no">1070</span><span id="line-1070"> // It depends on:</span> |
| <span class="source-line-no">1071</span><span id="line-1071"> // 1. Overhead - if overhead is big we could more aggressive</span> |
| <span class="source-line-no">1072</span><span id="line-1072"> // reducing amount of caching blocks.</span> |
| <span class="source-line-no">1073</span><span id="line-1073"> // 2. How fast we want to get the result. If we know that our</span> |
| <span class="source-line-no">1074</span><span id="line-1074"> // heavy reading for a long time, we don't want to wait and can</span> |
| <span class="source-line-no">1075</span><span id="line-1075"> // increase the coefficient and get good performance quite soon.</span> |
| <span class="source-line-no">1076</span><span id="line-1076"> // But if we don't sure we can do it slowly and it could prevent</span> |
| <span class="source-line-no">1077</span><span id="line-1077"> // premature exit from this mode. So, when the coefficient is</span> |
| <span class="source-line-no">1078</span><span id="line-1078"> // higher we can get better performance when heavy reading is stable.</span> |
| <span class="source-line-no">1079</span><span id="line-1079"> // But when reading is changing we can adjust to it and set</span> |
| <span class="source-line-no">1080</span><span id="line-1080"> // the coefficient to lower value.</span> |
| <span class="source-line-no">1081</span><span id="line-1081"> int change =</span> |
| <span class="source-line-no">1082</span><span id="line-1082"> (int) (freedDataOverheadPercent * cache.heavyEvictionOverheadCoefficient);</span> |
| <span class="source-line-no">1083</span><span id="line-1083"> // But practice shows that 15% of reducing is quite enough.</span> |
| <span class="source-line-no">1084</span><span id="line-1084"> // We are not greedy (it could lead to premature exit).</span> |
| <span class="source-line-no">1085</span><span id="line-1085"> change = Math.min(15, change);</span> |
| <span class="source-line-no">1086</span><span id="line-1086"> change = Math.max(0, change); // I think it will never happen but check for sure</span> |
| <span class="source-line-no">1087</span><span id="line-1087"> // So this is the key point, here we are reducing % of caching blocks</span> |
| <span class="source-line-no">1088</span><span id="line-1088"> cache.cacheDataBlockPercent -= change;</span> |
| <span class="source-line-no">1089</span><span id="line-1089"> // If we go down too deep we have to stop here, 1% any way should be.</span> |
| <span class="source-line-no">1090</span><span id="line-1090"> cache.cacheDataBlockPercent = Math.max(1, cache.cacheDataBlockPercent);</span> |
| <span class="source-line-no">1091</span><span id="line-1091"> }</span> |
| <span class="source-line-no">1092</span><span id="line-1092"> } else {</span> |
| <span class="source-line-no">1093</span><span id="line-1093"> // Well, we have got overshooting.</span> |
| <span class="source-line-no">1094</span><span id="line-1094"> // Mayby it is just short-term fluctuation and we can stay in this mode.</span> |
| <span class="source-line-no">1095</span><span id="line-1095"> // It help avoid permature exit during short-term fluctuation.</span> |
| <span class="source-line-no">1096</span><span id="line-1096"> // If overshooting less than 90%, we will try to increase the percent of</span> |
| <span class="source-line-no">1097</span><span id="line-1097"> // caching blocks and hope it is enough.</span> |
| <span class="source-line-no">1098</span><span id="line-1098"> if (freedSumMb >= cache.heavyEvictionMbSizeLimit * 0.1) {</span> |
| <span class="source-line-no">1099</span><span id="line-1099"> // Simple logic: more overshooting - more caching blocks (backpressure)</span> |
| <span class="source-line-no">1100</span><span id="line-1100"> int change = (int) (-freedDataOverheadPercent * 0.1 + 1);</span> |
| <span class="source-line-no">1101</span><span id="line-1101"> cache.cacheDataBlockPercent += change;</span> |
| <span class="source-line-no">1102</span><span id="line-1102"> // But it can't be more then 100%, so check it.</span> |
| <span class="source-line-no">1103</span><span id="line-1103"> cache.cacheDataBlockPercent = Math.min(100, cache.cacheDataBlockPercent);</span> |
| <span class="source-line-no">1104</span><span id="line-1104"> } else {</span> |
| <span class="source-line-no">1105</span><span id="line-1105"> // Looks like heavy reading is over.</span> |
| <span class="source-line-no">1106</span><span id="line-1106"> // Just exit form this mode.</span> |
| <span class="source-line-no">1107</span><span id="line-1107"> heavyEvictionCount = 0;</span> |
| <span class="source-line-no">1108</span><span id="line-1108"> cache.cacheDataBlockPercent = 100;</span> |
| <span class="source-line-no">1109</span><span id="line-1109"> }</span> |
| <span class="source-line-no">1110</span><span id="line-1110"> }</span> |
| <span class="source-line-no">1111</span><span id="line-1111"> LOG.info(</span> |
| <span class="source-line-no">1112</span><span id="line-1112"> "BlockCache evicted (MB): {}, overhead (%): {}, " + "heavy eviction counter: {}, "</span> |
| <span class="source-line-no">1113</span><span id="line-1113"> + "current caching DataBlock (%): {}",</span> |
| <span class="source-line-no">1114</span><span id="line-1114"> freedSumMb, freedDataOverheadPercent, heavyEvictionCount, cache.cacheDataBlockPercent);</span> |
| <span class="source-line-no">1115</span><span id="line-1115"></span> |
| <span class="source-line-no">1116</span><span id="line-1116"> freedSumMb = 0;</span> |
| <span class="source-line-no">1117</span><span id="line-1117"> startTime = stopTime;</span> |
| <span class="source-line-no">1118</span><span id="line-1118"> }</span> |
| <span class="source-line-no">1119</span><span id="line-1119"> }</span> |
| <span class="source-line-no">1120</span><span id="line-1120"> }</span> |
| <span class="source-line-no">1121</span><span id="line-1121"></span> |
| <span class="source-line-no">1122</span><span id="line-1122"> @edu.umd.cs.findbugs.annotations.SuppressWarnings(value = "NN_NAKED_NOTIFY",</span> |
| <span class="source-line-no">1123</span><span id="line-1123"> justification = "This is what we want")</span> |
| <span class="source-line-no">1124</span><span id="line-1124"> public void evict() {</span> |
| <span class="source-line-no">1125</span><span id="line-1125"> synchronized (this) {</span> |
| <span class="source-line-no">1126</span><span id="line-1126"> this.notifyAll();</span> |
| <span class="source-line-no">1127</span><span id="line-1127"> }</span> |
| <span class="source-line-no">1128</span><span id="line-1128"> }</span> |
| <span class="source-line-no">1129</span><span id="line-1129"></span> |
| <span class="source-line-no">1130</span><span id="line-1130"> synchronized void shutdown() {</span> |
| <span class="source-line-no">1131</span><span id="line-1131"> this.go = false;</span> |
| <span class="source-line-no">1132</span><span id="line-1132"> this.notifyAll();</span> |
| <span class="source-line-no">1133</span><span id="line-1133"> }</span> |
| <span class="source-line-no">1134</span><span id="line-1134"></span> |
| <span class="source-line-no">1135</span><span id="line-1135"> /**</span> |
| <span class="source-line-no">1136</span><span id="line-1136"> * Used for the test.</span> |
| <span class="source-line-no">1137</span><span id="line-1137"> */</span> |
| <span class="source-line-no">1138</span><span id="line-1138"> boolean isEnteringRun() {</span> |
| <span class="source-line-no">1139</span><span id="line-1139"> return this.enteringRun;</span> |
| <span class="source-line-no">1140</span><span id="line-1140"> }</span> |
| <span class="source-line-no">1141</span><span id="line-1141"> }</span> |
| <span class="source-line-no">1142</span><span id="line-1142"></span> |
| <span class="source-line-no">1143</span><span id="line-1143"> /*</span> |
| <span class="source-line-no">1144</span><span id="line-1144"> * Statistics thread. Periodically prints the cache statistics to the log.</span> |
| <span class="source-line-no">1145</span><span id="line-1145"> */</span> |
| <span class="source-line-no">1146</span><span id="line-1146"> static class StatisticsThread extends Thread {</span> |
| <span class="source-line-no">1147</span><span id="line-1147"></span> |
| <span class="source-line-no">1148</span><span id="line-1148"> private final LruAdaptiveBlockCache lru;</span> |
| <span class="source-line-no">1149</span><span id="line-1149"></span> |
| <span class="source-line-no">1150</span><span id="line-1150"> public StatisticsThread(LruAdaptiveBlockCache lru) {</span> |
| <span class="source-line-no">1151</span><span id="line-1151"> super("LruAdaptiveBlockCacheStats");</span> |
| <span class="source-line-no">1152</span><span id="line-1152"> setDaemon(true);</span> |
| <span class="source-line-no">1153</span><span id="line-1153"> this.lru = lru;</span> |
| <span class="source-line-no">1154</span><span id="line-1154"> }</span> |
| <span class="source-line-no">1155</span><span id="line-1155"></span> |
| <span class="source-line-no">1156</span><span id="line-1156"> @Override</span> |
| <span class="source-line-no">1157</span><span id="line-1157"> public void run() {</span> |
| <span class="source-line-no">1158</span><span id="line-1158"> lru.logStats();</span> |
| <span class="source-line-no">1159</span><span id="line-1159"> }</span> |
| <span class="source-line-no">1160</span><span id="line-1160"> }</span> |
| <span class="source-line-no">1161</span><span id="line-1161"></span> |
| <span class="source-line-no">1162</span><span id="line-1162"> public void logStats() {</span> |
| <span class="source-line-no">1163</span><span id="line-1163"> // Log size</span> |
| <span class="source-line-no">1164</span><span id="line-1164"> long totalSize = heapSize();</span> |
| <span class="source-line-no">1165</span><span id="line-1165"> long freeSize = maxSize - totalSize;</span> |
| <span class="source-line-no">1166</span><span id="line-1166"> LruAdaptiveBlockCache.LOG</span> |
| <span class="source-line-no">1167</span><span id="line-1167"> .info("totalSize=" + StringUtils.byteDesc(totalSize) + ", " + "freeSize="</span> |
| <span class="source-line-no">1168</span><span id="line-1168"> + StringUtils.byteDesc(freeSize) + ", " + "max=" + StringUtils.byteDesc(this.maxSize) + ", "</span> |
| <span class="source-line-no">1169</span><span id="line-1169"> + "blockCount=" + getBlockCount() + ", " + "accesses=" + stats.getRequestCount() + ", "</span> |
| <span class="source-line-no">1170</span><span id="line-1170"> + "hits=" + stats.getHitCount() + ", " + "hitRatio="</span> |
| <span class="source-line-no">1171</span><span id="line-1171"> + (stats.getHitCount() == 0</span> |
| <span class="source-line-no">1172</span><span id="line-1172"> ? "0"</span> |
| <span class="source-line-no">1173</span><span id="line-1173"> : (StringUtils.formatPercent(stats.getHitRatio(), 2) + ", "))</span> |
| <span class="source-line-no">1174</span><span id="line-1174"> + ", " + "cachingAccesses=" + stats.getRequestCachingCount() + ", " + "cachingHits="</span> |
| <span class="source-line-no">1175</span><span id="line-1175"> + stats.getHitCachingCount() + ", " + "cachingHitsRatio="</span> |
| <span class="source-line-no">1176</span><span id="line-1176"> + (stats.getHitCachingCount() == 0</span> |
| <span class="source-line-no">1177</span><span id="line-1177"> ? "0,"</span> |
| <span class="source-line-no">1178</span><span id="line-1178"> : (StringUtils.formatPercent(stats.getHitCachingRatio(), 2) + ", "))</span> |
| <span class="source-line-no">1179</span><span id="line-1179"> + "evictions=" + stats.getEvictionCount() + ", " + "evicted=" + stats.getEvictedCount()</span> |
| <span class="source-line-no">1180</span><span id="line-1180"> + ", " + "evictedPerRun=" + stats.evictedPerEviction());</span> |
| <span class="source-line-no">1181</span><span id="line-1181"> }</span> |
| <span class="source-line-no">1182</span><span id="line-1182"></span> |
| <span class="source-line-no">1183</span><span id="line-1183"> /**</span> |
| <span class="source-line-no">1184</span><span id="line-1184"> * Get counter statistics for this cache.</span> |
| <span class="source-line-no">1185</span><span id="line-1185"> * <p></span> |
| <span class="source-line-no">1186</span><span id="line-1186"> * Includes: total accesses, hits, misses, evicted blocks, and runs of the eviction processes.</span> |
| <span class="source-line-no">1187</span><span id="line-1187"> */</span> |
| <span class="source-line-no">1188</span><span id="line-1188"> @Override</span> |
| <span class="source-line-no">1189</span><span id="line-1189"> public CacheStats getStats() {</span> |
| <span class="source-line-no">1190</span><span id="line-1190"> return this.stats;</span> |
| <span class="source-line-no">1191</span><span id="line-1191"> }</span> |
| <span class="source-line-no">1192</span><span id="line-1192"></span> |
| <span class="source-line-no">1193</span><span id="line-1193"> public final static long CACHE_FIXED_OVERHEAD =</span> |
| <span class="source-line-no">1194</span><span id="line-1194"> ClassSize.estimateBase(LruAdaptiveBlockCache.class, false);</span> |
| <span class="source-line-no">1195</span><span id="line-1195"></span> |
| <span class="source-line-no">1196</span><span id="line-1196"> @Override</span> |
| <span class="source-line-no">1197</span><span id="line-1197"> public long heapSize() {</span> |
| <span class="source-line-no">1198</span><span id="line-1198"> return getCurrentSize();</span> |
| <span class="source-line-no">1199</span><span id="line-1199"> }</span> |
| <span class="source-line-no">1200</span><span id="line-1200"></span> |
| <span class="source-line-no">1201</span><span id="line-1201"> private static long calculateOverhead(long maxSize, long blockSize, int concurrency) {</span> |
| <span class="source-line-no">1202</span><span id="line-1202"> // FindBugs ICAST_INTEGER_MULTIPLY_CAST_TO_LONG</span> |
| <span class="source-line-no">1203</span><span id="line-1203"> return CACHE_FIXED_OVERHEAD + ClassSize.CONCURRENT_HASHMAP</span> |
| <span class="source-line-no">1204</span><span id="line-1204"> + ((long) Math.ceil(maxSize * 1.2 / blockSize) * ClassSize.CONCURRENT_HASHMAP_ENTRY)</span> |
| <span class="source-line-no">1205</span><span id="line-1205"> + ((long) concurrency * ClassSize.CONCURRENT_HASHMAP_SEGMENT);</span> |
| <span class="source-line-no">1206</span><span id="line-1206"> }</span> |
| <span class="source-line-no">1207</span><span id="line-1207"></span> |
| <span class="source-line-no">1208</span><span id="line-1208"> @Override</span> |
| <span class="source-line-no">1209</span><span id="line-1209"> public Iterator<CachedBlock> iterator() {</span> |
| <span class="source-line-no">1210</span><span id="line-1210"> final Iterator<LruCachedBlock> iterator = map.values().iterator();</span> |
| <span class="source-line-no">1211</span><span id="line-1211"></span> |
| <span class="source-line-no">1212</span><span id="line-1212"> return new Iterator<CachedBlock>() {</span> |
| <span class="source-line-no">1213</span><span id="line-1213"> private final long now = System.nanoTime();</span> |
| <span class="source-line-no">1214</span><span id="line-1214"></span> |
| <span class="source-line-no">1215</span><span id="line-1215"> @Override</span> |
| <span class="source-line-no">1216</span><span id="line-1216"> public boolean hasNext() {</span> |
| <span class="source-line-no">1217</span><span id="line-1217"> return iterator.hasNext();</span> |
| <span class="source-line-no">1218</span><span id="line-1218"> }</span> |
| <span class="source-line-no">1219</span><span id="line-1219"></span> |
| <span class="source-line-no">1220</span><span id="line-1220"> @Override</span> |
| <span class="source-line-no">1221</span><span id="line-1221"> public CachedBlock next() {</span> |
| <span class="source-line-no">1222</span><span id="line-1222"> final LruCachedBlock b = iterator.next();</span> |
| <span class="source-line-no">1223</span><span id="line-1223"> return new CachedBlock() {</span> |
| <span class="source-line-no">1224</span><span id="line-1224"> @Override</span> |
| <span class="source-line-no">1225</span><span id="line-1225"> public String toString() {</span> |
| <span class="source-line-no">1226</span><span id="line-1226"> return BlockCacheUtil.toString(this, now);</span> |
| <span class="source-line-no">1227</span><span id="line-1227"> }</span> |
| <span class="source-line-no">1228</span><span id="line-1228"></span> |
| <span class="source-line-no">1229</span><span id="line-1229"> @Override</span> |
| <span class="source-line-no">1230</span><span id="line-1230"> public BlockPriority getBlockPriority() {</span> |
| <span class="source-line-no">1231</span><span id="line-1231"> return b.getPriority();</span> |
| <span class="source-line-no">1232</span><span id="line-1232"> }</span> |
| <span class="source-line-no">1233</span><span id="line-1233"></span> |
| <span class="source-line-no">1234</span><span id="line-1234"> @Override</span> |
| <span class="source-line-no">1235</span><span id="line-1235"> public BlockType getBlockType() {</span> |
| <span class="source-line-no">1236</span><span id="line-1236"> return b.getBuffer().getBlockType();</span> |
| <span class="source-line-no">1237</span><span id="line-1237"> }</span> |
| <span class="source-line-no">1238</span><span id="line-1238"></span> |
| <span class="source-line-no">1239</span><span id="line-1239"> @Override</span> |
| <span class="source-line-no">1240</span><span id="line-1240"> public long getOffset() {</span> |
| <span class="source-line-no">1241</span><span id="line-1241"> return b.getCacheKey().getOffset();</span> |
| <span class="source-line-no">1242</span><span id="line-1242"> }</span> |
| <span class="source-line-no">1243</span><span id="line-1243"></span> |
| <span class="source-line-no">1244</span><span id="line-1244"> @Override</span> |
| <span class="source-line-no">1245</span><span id="line-1245"> public long getSize() {</span> |
| <span class="source-line-no">1246</span><span id="line-1246"> return b.getBuffer().heapSize();</span> |
| <span class="source-line-no">1247</span><span id="line-1247"> }</span> |
| <span class="source-line-no">1248</span><span id="line-1248"></span> |
| <span class="source-line-no">1249</span><span id="line-1249"> @Override</span> |
| <span class="source-line-no">1250</span><span id="line-1250"> public long getCachedTime() {</span> |
| <span class="source-line-no">1251</span><span id="line-1251"> return b.getCachedTime();</span> |
| <span class="source-line-no">1252</span><span id="line-1252"> }</span> |
| <span class="source-line-no">1253</span><span id="line-1253"></span> |
| <span class="source-line-no">1254</span><span id="line-1254"> @Override</span> |
| <span class="source-line-no">1255</span><span id="line-1255"> public String getFilename() {</span> |
| <span class="source-line-no">1256</span><span id="line-1256"> return b.getCacheKey().getHfileName();</span> |
| <span class="source-line-no">1257</span><span id="line-1257"> }</span> |
| <span class="source-line-no">1258</span><span id="line-1258"></span> |
| <span class="source-line-no">1259</span><span id="line-1259"> @Override</span> |
| <span class="source-line-no">1260</span><span id="line-1260"> public int compareTo(CachedBlock other) {</span> |
| <span class="source-line-no">1261</span><span id="line-1261"> int diff = this.getFilename().compareTo(other.getFilename());</span> |
| <span class="source-line-no">1262</span><span id="line-1262"> if (diff != 0) {</span> |
| <span class="source-line-no">1263</span><span id="line-1263"> return diff;</span> |
| <span class="source-line-no">1264</span><span id="line-1264"> }</span> |
| <span class="source-line-no">1265</span><span id="line-1265"> diff = Long.compare(this.getOffset(), other.getOffset());</span> |
| <span class="source-line-no">1266</span><span id="line-1266"> if (diff != 0) {</span> |
| <span class="source-line-no">1267</span><span id="line-1267"> return diff;</span> |
| <span class="source-line-no">1268</span><span id="line-1268"> }</span> |
| <span class="source-line-no">1269</span><span id="line-1269"> if (other.getCachedTime() < 0 || this.getCachedTime() < 0) {</span> |
| <span class="source-line-no">1270</span><span id="line-1270"> throw new IllegalStateException(this.getCachedTime() + ", " + other.getCachedTime());</span> |
| <span class="source-line-no">1271</span><span id="line-1271"> }</span> |
| <span class="source-line-no">1272</span><span id="line-1272"> return Long.compare(other.getCachedTime(), this.getCachedTime());</span> |
| <span class="source-line-no">1273</span><span id="line-1273"> }</span> |
| <span class="source-line-no">1274</span><span id="line-1274"></span> |
| <span class="source-line-no">1275</span><span id="line-1275"> @Override</span> |
| <span class="source-line-no">1276</span><span id="line-1276"> public int hashCode() {</span> |
| <span class="source-line-no">1277</span><span id="line-1277"> return b.hashCode();</span> |
| <span class="source-line-no">1278</span><span id="line-1278"> }</span> |
| <span class="source-line-no">1279</span><span id="line-1279"></span> |
| <span class="source-line-no">1280</span><span id="line-1280"> @Override</span> |
| <span class="source-line-no">1281</span><span id="line-1281"> public boolean equals(Object obj) {</span> |
| <span class="source-line-no">1282</span><span id="line-1282"> if (obj instanceof CachedBlock) {</span> |
| <span class="source-line-no">1283</span><span id="line-1283"> CachedBlock cb = (CachedBlock) obj;</span> |
| <span class="source-line-no">1284</span><span id="line-1284"> return compareTo(cb) == 0;</span> |
| <span class="source-line-no">1285</span><span id="line-1285"> } else {</span> |
| <span class="source-line-no">1286</span><span id="line-1286"> return false;</span> |
| <span class="source-line-no">1287</span><span id="line-1287"> }</span> |
| <span class="source-line-no">1288</span><span id="line-1288"> }</span> |
| <span class="source-line-no">1289</span><span id="line-1289"> };</span> |
| <span class="source-line-no">1290</span><span id="line-1290"> }</span> |
| <span class="source-line-no">1291</span><span id="line-1291"></span> |
| <span class="source-line-no">1292</span><span id="line-1292"> @Override</span> |
| <span class="source-line-no">1293</span><span id="line-1293"> public void remove() {</span> |
| <span class="source-line-no">1294</span><span id="line-1294"> throw new UnsupportedOperationException();</span> |
| <span class="source-line-no">1295</span><span id="line-1295"> }</span> |
| <span class="source-line-no">1296</span><span id="line-1296"> };</span> |
| <span class="source-line-no">1297</span><span id="line-1297"> }</span> |
| <span class="source-line-no">1298</span><span id="line-1298"></span> |
| <span class="source-line-no">1299</span><span id="line-1299"> // Simple calculators of sizes given factors and maxSize</span> |
| <span class="source-line-no">1300</span><span id="line-1300"></span> |
| <span class="source-line-no">1301</span><span id="line-1301"> long acceptableSize() {</span> |
| <span class="source-line-no">1302</span><span id="line-1302"> return (long) Math.floor(this.maxSize * this.acceptableFactor);</span> |
| <span class="source-line-no">1303</span><span id="line-1303"> }</span> |
| <span class="source-line-no">1304</span><span id="line-1304"></span> |
| <span class="source-line-no">1305</span><span id="line-1305"> private long minSize() {</span> |
| <span class="source-line-no">1306</span><span id="line-1306"> return (long) Math.floor(this.maxSize * this.minFactor);</span> |
| <span class="source-line-no">1307</span><span id="line-1307"> }</span> |
| <span class="source-line-no">1308</span><span id="line-1308"></span> |
| <span class="source-line-no">1309</span><span id="line-1309"> private long singleSize() {</span> |
| <span class="source-line-no">1310</span><span id="line-1310"> return (long) Math.floor(this.maxSize * this.singleFactor * this.minFactor);</span> |
| <span class="source-line-no">1311</span><span id="line-1311"> }</span> |
| <span class="source-line-no">1312</span><span id="line-1312"></span> |
| <span class="source-line-no">1313</span><span id="line-1313"> private long multiSize() {</span> |
| <span class="source-line-no">1314</span><span id="line-1314"> return (long) Math.floor(this.maxSize * this.multiFactor * this.minFactor);</span> |
| <span class="source-line-no">1315</span><span id="line-1315"> }</span> |
| <span class="source-line-no">1316</span><span id="line-1316"></span> |
| <span class="source-line-no">1317</span><span id="line-1317"> private long memorySize() {</span> |
| <span class="source-line-no">1318</span><span id="line-1318"> return (long) Math.floor(this.maxSize * this.memoryFactor * this.minFactor);</span> |
| <span class="source-line-no">1319</span><span id="line-1319"> }</span> |
| <span class="source-line-no">1320</span><span id="line-1320"></span> |
| <span class="source-line-no">1321</span><span id="line-1321"> @Override</span> |
| <span class="source-line-no">1322</span><span id="line-1322"> public void shutdown() {</span> |
| <span class="source-line-no">1323</span><span id="line-1323"> if (victimHandler != null) {</span> |
| <span class="source-line-no">1324</span><span id="line-1324"> victimHandler.shutdown();</span> |
| <span class="source-line-no">1325</span><span id="line-1325"> }</span> |
| <span class="source-line-no">1326</span><span id="line-1326"> this.scheduleThreadPool.shutdown();</span> |
| <span class="source-line-no">1327</span><span id="line-1327"> for (int i = 0; i < 10; i++) {</span> |
| <span class="source-line-no">1328</span><span id="line-1328"> if (!this.scheduleThreadPool.isShutdown()) {</span> |
| <span class="source-line-no">1329</span><span id="line-1329"> try {</span> |
| <span class="source-line-no">1330</span><span id="line-1330"> Thread.sleep(10);</span> |
| <span class="source-line-no">1331</span><span id="line-1331"> } catch (InterruptedException e) {</span> |
| <span class="source-line-no">1332</span><span id="line-1332"> LOG.warn("Interrupted while sleeping");</span> |
| <span class="source-line-no">1333</span><span id="line-1333"> Thread.currentThread().interrupt();</span> |
| <span class="source-line-no">1334</span><span id="line-1334"> break;</span> |
| <span class="source-line-no">1335</span><span id="line-1335"> }</span> |
| <span class="source-line-no">1336</span><span id="line-1336"> }</span> |
| <span class="source-line-no">1337</span><span id="line-1337"> }</span> |
| <span class="source-line-no">1338</span><span id="line-1338"></span> |
| <span class="source-line-no">1339</span><span id="line-1339"> if (!this.scheduleThreadPool.isShutdown()) {</span> |
| <span class="source-line-no">1340</span><span id="line-1340"> List<Runnable> runnables = this.scheduleThreadPool.shutdownNow();</span> |
| <span class="source-line-no">1341</span><span id="line-1341"> LOG.debug("Still running " + runnables);</span> |
| <span class="source-line-no">1342</span><span id="line-1342"> }</span> |
| <span class="source-line-no">1343</span><span id="line-1343"> this.evictionThread.shutdown();</span> |
| <span class="source-line-no">1344</span><span id="line-1344"> }</span> |
| <span class="source-line-no">1345</span><span id="line-1345"></span> |
| <span class="source-line-no">1346</span><span id="line-1346"> /** Clears the cache. Used in tests. */</span> |
| <span class="source-line-no">1347</span><span id="line-1347"> public void clearCache() {</span> |
| <span class="source-line-no">1348</span><span id="line-1348"> this.map.clear();</span> |
| <span class="source-line-no">1349</span><span id="line-1349"> this.elements.set(0);</span> |
| <span class="source-line-no">1350</span><span id="line-1350"> }</span> |
| <span class="source-line-no">1351</span><span id="line-1351"></span> |
| <span class="source-line-no">1352</span><span id="line-1352"> public Map<DataBlockEncoding, Integer> getEncodingCountsForTest() {</span> |
| <span class="source-line-no">1353</span><span id="line-1353"> Map<DataBlockEncoding, Integer> counts = new EnumMap<>(DataBlockEncoding.class);</span> |
| <span class="source-line-no">1354</span><span id="line-1354"> for (LruCachedBlock block : map.values()) {</span> |
| <span class="source-line-no">1355</span><span id="line-1355"> DataBlockEncoding encoding = ((HFileBlock) block.getBuffer()).getDataBlockEncoding();</span> |
| <span class="source-line-no">1356</span><span id="line-1356"> Integer count = counts.get(encoding);</span> |
| <span class="source-line-no">1357</span><span id="line-1357"> counts.put(encoding, (count == null ? 0 : count) + 1);</span> |
| <span class="source-line-no">1358</span><span id="line-1358"> }</span> |
| <span class="source-line-no">1359</span><span id="line-1359"> return counts;</span> |
| <span class="source-line-no">1360</span><span id="line-1360"> }</span> |
| <span class="source-line-no">1361</span><span id="line-1361"></span> |
| <span class="source-line-no">1362</span><span id="line-1362"> Map<BlockCacheKey, LruCachedBlock> getMapForTests() {</span> |
| <span class="source-line-no">1363</span><span id="line-1363"> return map;</span> |
| <span class="source-line-no">1364</span><span id="line-1364"> }</span> |
| <span class="source-line-no">1365</span><span id="line-1365"></span> |
| <span class="source-line-no">1366</span><span id="line-1366"> @Override</span> |
| <span class="source-line-no">1367</span><span id="line-1367"> public BlockCache[] getBlockCaches() {</span> |
| <span class="source-line-no">1368</span><span id="line-1368"> if (victimHandler != null) {</span> |
| <span class="source-line-no">1369</span><span id="line-1369"> return new BlockCache[] { this, this.victimHandler };</span> |
| <span class="source-line-no">1370</span><span id="line-1370"> }</span> |
| <span class="source-line-no">1371</span><span id="line-1371"> return null;</span> |
| <span class="source-line-no">1372</span><span id="line-1372"> }</span> |
| <span class="source-line-no">1373</span><span id="line-1373">}</span> |
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| </pre> |
| </div> |
| </main> |
| </body> |
| </html> |
