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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.mob;</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 java.io.IOException;</span> |
| <span class="source-line-no">021</span><span id="line-21">import java.util.ArrayList;</span> |
| <span class="source-line-no">022</span><span id="line-22">import java.util.Collections;</span> |
| <span class="source-line-no">023</span><span id="line-23">import java.util.List;</span> |
| <span class="source-line-no">024</span><span id="line-24">import java.util.Map;</span> |
| <span class="source-line-no">025</span><span id="line-25">import java.util.concurrent.ConcurrentHashMap;</span> |
| <span class="source-line-no">026</span><span id="line-26">import java.util.concurrent.Executors;</span> |
| <span class="source-line-no">027</span><span id="line-27">import java.util.concurrent.ScheduledExecutorService;</span> |
| <span class="source-line-no">028</span><span id="line-28">import java.util.concurrent.TimeUnit;</span> |
| <span class="source-line-no">029</span><span id="line-29">import java.util.concurrent.atomic.AtomicLong;</span> |
| <span class="source-line-no">030</span><span id="line-30">import java.util.concurrent.atomic.LongAdder;</span> |
| <span class="source-line-no">031</span><span id="line-31">import java.util.concurrent.locks.ReentrantLock;</span> |
| <span class="source-line-no">032</span><span id="line-32">import org.apache.hadoop.conf.Configuration;</span> |
| <span class="source-line-no">033</span><span id="line-33">import org.apache.hadoop.fs.FileSystem;</span> |
| <span class="source-line-no">034</span><span id="line-34">import org.apache.hadoop.fs.Path;</span> |
| <span class="source-line-no">035</span><span id="line-35">import org.apache.hadoop.hbase.io.hfile.CacheConfig;</span> |
| <span class="source-line-no">036</span><span id="line-36">import org.apache.hadoop.hbase.util.IdLock;</span> |
| <span class="source-line-no">037</span><span id="line-37">import org.apache.yetus.audience.InterfaceAudience;</span> |
| <span class="source-line-no">038</span><span id="line-38">import org.slf4j.Logger;</span> |
| <span class="source-line-no">039</span><span id="line-39">import org.slf4j.LoggerFactory;</span> |
| <span class="source-line-no">040</span><span id="line-40"></span> |
| <span class="source-line-no">041</span><span id="line-41">import org.apache.hbase.thirdparty.com.google.common.hash.Hashing;</span> |
| <span class="source-line-no">042</span><span id="line-42">import org.apache.hbase.thirdparty.com.google.common.util.concurrent.ThreadFactoryBuilder;</span> |
| <span class="source-line-no">043</span><span id="line-43"></span> |
| <span class="source-line-no">044</span><span id="line-44">/**</span> |
| <span class="source-line-no">045</span><span id="line-45"> * The cache for mob files. This cache doesn't cache the mob file blocks. It only caches the</span> |
| <span class="source-line-no">046</span><span id="line-46"> * references of mob files. We are doing this to avoid opening and closing mob files all the time.</span> |
| <span class="source-line-no">047</span><span id="line-47"> * We just keep references open.</span> |
| <span class="source-line-no">048</span><span id="line-48"> */</span> |
| <span class="source-line-no">049</span><span id="line-49">@InterfaceAudience.Private</span> |
| <span class="source-line-no">050</span><span id="line-50">public class MobFileCache {</span> |
| <span class="source-line-no">051</span><span id="line-51"></span> |
| <span class="source-line-no">052</span><span id="line-52"> private static final Logger LOG = LoggerFactory.getLogger(MobFileCache.class);</span> |
| <span class="source-line-no">053</span><span id="line-53"></span> |
| <span class="source-line-no">054</span><span id="line-54"> /*</span> |
| <span class="source-line-no">055</span><span id="line-55"> * Eviction and statistics thread. Periodically run to print the statistics and evict the lru</span> |
| <span class="source-line-no">056</span><span id="line-56"> * cached mob files when the count of the cached files is larger than the threshold.</span> |
| <span class="source-line-no">057</span><span id="line-57"> */</span> |
| <span class="source-line-no">058</span><span id="line-58"> static class EvictionThread extends Thread {</span> |
| <span class="source-line-no">059</span><span id="line-59"> MobFileCache lru;</span> |
| <span class="source-line-no">060</span><span id="line-60"></span> |
| <span class="source-line-no">061</span><span id="line-61"> public EvictionThread(MobFileCache lru) {</span> |
| <span class="source-line-no">062</span><span id="line-62"> super("MobFileCache.EvictionThread");</span> |
| <span class="source-line-no">063</span><span id="line-63"> setDaemon(true);</span> |
| <span class="source-line-no">064</span><span id="line-64"> this.lru = lru;</span> |
| <span class="source-line-no">065</span><span id="line-65"> }</span> |
| <span class="source-line-no">066</span><span id="line-66"></span> |
| <span class="source-line-no">067</span><span id="line-67"> @Override</span> |
| <span class="source-line-no">068</span><span id="line-68"> public void run() {</span> |
| <span class="source-line-no">069</span><span id="line-69"> lru.evict();</span> |
| <span class="source-line-no">070</span><span id="line-70"> }</span> |
| <span class="source-line-no">071</span><span id="line-71"> }</span> |
| <span class="source-line-no">072</span><span id="line-72"></span> |
| <span class="source-line-no">073</span><span id="line-73"> // a ConcurrentHashMap, accesses to this map are synchronized.</span> |
| <span class="source-line-no">074</span><span id="line-74"> private Map<String, CachedMobFile> map = null;</span> |
| <span class="source-line-no">075</span><span id="line-75"> // caches access count</span> |
| <span class="source-line-no">076</span><span id="line-76"> private final AtomicLong count = new AtomicLong(0);</span> |
| <span class="source-line-no">077</span><span id="line-77"> private long lastAccess = 0;</span> |
| <span class="source-line-no">078</span><span id="line-78"> private final LongAdder miss = new LongAdder();</span> |
| <span class="source-line-no">079</span><span id="line-79"> private long lastMiss = 0;</span> |
| <span class="source-line-no">080</span><span id="line-80"> private final LongAdder evictedFileCount = new LongAdder();</span> |
| <span class="source-line-no">081</span><span id="line-81"> private long lastEvictedFileCount = 0;</span> |
| <span class="source-line-no">082</span><span id="line-82"></span> |
| <span class="source-line-no">083</span><span id="line-83"> // a lock to sync the evict to guarantee the eviction occurs in sequence.</span> |
| <span class="source-line-no">084</span><span id="line-84"> // the method evictFile is not sync by this lock, the ConcurrentHashMap does the sync there.</span> |
| <span class="source-line-no">085</span><span id="line-85"> private final ReentrantLock evictionLock = new ReentrantLock(true);</span> |
| <span class="source-line-no">086</span><span id="line-86"></span> |
| <span class="source-line-no">087</span><span id="line-87"> // stripes lock on each mob file based on its hash. Sync the openFile/closeFile operations.</span> |
| <span class="source-line-no">088</span><span id="line-88"> private final IdLock keyLock = new IdLock();</span> |
| <span class="source-line-no">089</span><span id="line-89"></span> |
| <span class="source-line-no">090</span><span id="line-90"> private final ScheduledExecutorService scheduleThreadPool = Executors.newScheduledThreadPool(1,</span> |
| <span class="source-line-no">091</span><span id="line-91"> new ThreadFactoryBuilder().setNameFormat("MobFileCache #%d").setDaemon(true).build());</span> |
| <span class="source-line-no">092</span><span id="line-92"> private final Configuration conf;</span> |
| <span class="source-line-no">093</span><span id="line-93"></span> |
| <span class="source-line-no">094</span><span id="line-94"> // the count of the cached references to mob files</span> |
| <span class="source-line-no">095</span><span id="line-95"> private final int mobFileMaxCacheSize;</span> |
| <span class="source-line-no">096</span><span id="line-96"> private final boolean isCacheEnabled;</span> |
| <span class="source-line-no">097</span><span id="line-97"> private float evictRemainRatio;</span> |
| <span class="source-line-no">098</span><span id="line-98"></span> |
| <span class="source-line-no">099</span><span id="line-99"> public MobFileCache(Configuration conf) {</span> |
| <span class="source-line-no">100</span><span id="line-100"> this.conf = conf;</span> |
| <span class="source-line-no">101</span><span id="line-101"> this.mobFileMaxCacheSize =</span> |
| <span class="source-line-no">102</span><span id="line-102"> conf.getInt(MobConstants.MOB_FILE_CACHE_SIZE_KEY, MobConstants.DEFAULT_MOB_FILE_CACHE_SIZE);</span> |
| <span class="source-line-no">103</span><span id="line-103"> isCacheEnabled = (mobFileMaxCacheSize > 0);</span> |
| <span class="source-line-no">104</span><span id="line-104"> map = new ConcurrentHashMap<>(mobFileMaxCacheSize);</span> |
| <span class="source-line-no">105</span><span id="line-105"> if (isCacheEnabled) {</span> |
| <span class="source-line-no">106</span><span id="line-106"> long period = conf.getLong(MobConstants.MOB_CACHE_EVICT_PERIOD,</span> |
| <span class="source-line-no">107</span><span id="line-107"> MobConstants.DEFAULT_MOB_CACHE_EVICT_PERIOD); // in seconds</span> |
| <span class="source-line-no">108</span><span id="line-108"> evictRemainRatio = conf.getFloat(MobConstants.MOB_CACHE_EVICT_REMAIN_RATIO,</span> |
| <span class="source-line-no">109</span><span id="line-109"> MobConstants.DEFAULT_EVICT_REMAIN_RATIO);</span> |
| <span class="source-line-no">110</span><span id="line-110"> if (evictRemainRatio < 0.0) {</span> |
| <span class="source-line-no">111</span><span id="line-111"> evictRemainRatio = 0.0f;</span> |
| <span class="source-line-no">112</span><span id="line-112"> LOG.warn(MobConstants.MOB_CACHE_EVICT_REMAIN_RATIO + " is less than 0.0, 0.0 is used.");</span> |
| <span class="source-line-no">113</span><span id="line-113"> } else if (evictRemainRatio > 1.0) {</span> |
| <span class="source-line-no">114</span><span id="line-114"> evictRemainRatio = 1.0f;</span> |
| <span class="source-line-no">115</span><span id="line-115"> LOG.warn(MobConstants.MOB_CACHE_EVICT_REMAIN_RATIO + " is larger than 1.0, 1.0 is used.");</span> |
| <span class="source-line-no">116</span><span id="line-116"> }</span> |
| <span class="source-line-no">117</span><span id="line-117"> this.scheduleThreadPool.scheduleAtFixedRate(new EvictionThread(this), period, period,</span> |
| <span class="source-line-no">118</span><span id="line-118"> TimeUnit.SECONDS);</span> |
| <span class="source-line-no">119</span><span id="line-119"></span> |
| <span class="source-line-no">120</span><span id="line-120"> if (LOG.isDebugEnabled()) {</span> |
| <span class="source-line-no">121</span><span id="line-121"> LOG.debug("MobFileCache enabled with cacheSize=" + mobFileMaxCacheSize + ", evictPeriods="</span> |
| <span class="source-line-no">122</span><span id="line-122"> + period + "sec, evictRemainRatio=" + evictRemainRatio);</span> |
| <span class="source-line-no">123</span><span id="line-123"> }</span> |
| <span class="source-line-no">124</span><span id="line-124"> } else {</span> |
| <span class="source-line-no">125</span><span id="line-125"> LOG.info("MobFileCache disabled");</span> |
| <span class="source-line-no">126</span><span id="line-126"> }</span> |
| <span class="source-line-no">127</span><span id="line-127"> }</span> |
| <span class="source-line-no">128</span><span id="line-128"></span> |
| <span class="source-line-no">129</span><span id="line-129"> /**</span> |
| <span class="source-line-no">130</span><span id="line-130"> * Evicts the lru cached mob files when the count of the cached files is larger than the</span> |
| <span class="source-line-no">131</span><span id="line-131"> * threshold.</span> |
| <span class="source-line-no">132</span><span id="line-132"> */</span> |
| <span class="source-line-no">133</span><span id="line-133"> public void evict() {</span> |
| <span class="source-line-no">134</span><span id="line-134"> if (isCacheEnabled) {</span> |
| <span class="source-line-no">135</span><span id="line-135"> // Ensure only one eviction at a time</span> |
| <span class="source-line-no">136</span><span id="line-136"> if (!evictionLock.tryLock()) {</span> |
| <span class="source-line-no">137</span><span id="line-137"> return;</span> |
| <span class="source-line-no">138</span><span id="line-138"> }</span> |
| <span class="source-line-no">139</span><span id="line-139"> printStatistics();</span> |
| <span class="source-line-no">140</span><span id="line-140"> List<CachedMobFile> evictedFiles = new ArrayList<>();</span> |
| <span class="source-line-no">141</span><span id="line-141"> try {</span> |
| <span class="source-line-no">142</span><span id="line-142"> if (map.size() <= mobFileMaxCacheSize) {</span> |
| <span class="source-line-no">143</span><span id="line-143"> return;</span> |
| <span class="source-line-no">144</span><span id="line-144"> }</span> |
| <span class="source-line-no">145</span><span id="line-145"> List<CachedMobFile> files = new ArrayList<>(map.values());</span> |
| <span class="source-line-no">146</span><span id="line-146"> Collections.sort(files);</span> |
| <span class="source-line-no">147</span><span id="line-147"> int start = (int) (mobFileMaxCacheSize * evictRemainRatio);</span> |
| <span class="source-line-no">148</span><span id="line-148"> if (start >= 0) {</span> |
| <span class="source-line-no">149</span><span id="line-149"> for (int i = start; i < files.size(); i++) {</span> |
| <span class="source-line-no">150</span><span id="line-150"> String name = files.get(i).getFileName();</span> |
| <span class="source-line-no">151</span><span id="line-151"> CachedMobFile evictedFile = map.remove(name);</span> |
| <span class="source-line-no">152</span><span id="line-152"> if (evictedFile != null) {</span> |
| <span class="source-line-no">153</span><span id="line-153"> evictedFiles.add(evictedFile);</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"> }</span> |
| <span class="source-line-no">157</span><span id="line-157"> } finally {</span> |
| <span class="source-line-no">158</span><span id="line-158"> evictionLock.unlock();</span> |
| <span class="source-line-no">159</span><span id="line-159"> }</span> |
| <span class="source-line-no">160</span><span id="line-160"> // EvictionLock is released. Close the evicted files one by one.</span> |
| <span class="source-line-no">161</span><span id="line-161"> // The closes are sync in the closeFile method.</span> |
| <span class="source-line-no">162</span><span id="line-162"> for (CachedMobFile evictedFile : evictedFiles) {</span> |
| <span class="source-line-no">163</span><span id="line-163"> closeFile(evictedFile);</span> |
| <span class="source-line-no">164</span><span id="line-164"> }</span> |
| <span class="source-line-no">165</span><span id="line-165"> evictedFileCount.add(evictedFiles.size());</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"></span> |
| <span class="source-line-no">169</span><span id="line-169"> /**</span> |
| <span class="source-line-no">170</span><span id="line-170"> * Evicts the cached file by the name.</span> |
| <span class="source-line-no">171</span><span id="line-171"> * @param fileName The name of a cached file.</span> |
| <span class="source-line-no">172</span><span id="line-172"> */</span> |
| <span class="source-line-no">173</span><span id="line-173"> public void evictFile(String fileName) {</span> |
| <span class="source-line-no">174</span><span id="line-174"> if (isCacheEnabled) {</span> |
| <span class="source-line-no">175</span><span id="line-175"> IdLock.Entry lockEntry = null;</span> |
| <span class="source-line-no">176</span><span id="line-176"> try {</span> |
| <span class="source-line-no">177</span><span id="line-177"> // obtains the lock to close the cached file.</span> |
| <span class="source-line-no">178</span><span id="line-178"> lockEntry = keyLock.getLockEntry(hashFileName(fileName));</span> |
| <span class="source-line-no">179</span><span id="line-179"> CachedMobFile evictedFile = map.remove(fileName);</span> |
| <span class="source-line-no">180</span><span id="line-180"> if (evictedFile != null) {</span> |
| <span class="source-line-no">181</span><span id="line-181"> evictedFile.close();</span> |
| <span class="source-line-no">182</span><span id="line-182"> evictedFileCount.increment();</span> |
| <span class="source-line-no">183</span><span id="line-183"> }</span> |
| <span class="source-line-no">184</span><span id="line-184"> } catch (IOException e) {</span> |
| <span class="source-line-no">185</span><span id="line-185"> LOG.error("Failed to evict the file " + fileName, e);</span> |
| <span class="source-line-no">186</span><span id="line-186"> } finally {</span> |
| <span class="source-line-no">187</span><span id="line-187"> if (lockEntry != null) {</span> |
| <span class="source-line-no">188</span><span id="line-188"> keyLock.releaseLockEntry(lockEntry);</span> |
| <span class="source-line-no">189</span><span id="line-189"> }</span> |
| <span class="source-line-no">190</span><span id="line-190"> }</span> |
| <span class="source-line-no">191</span><span id="line-191"> }</span> |
| <span class="source-line-no">192</span><span id="line-192"> }</span> |
| <span class="source-line-no">193</span><span id="line-193"></span> |
| <span class="source-line-no">194</span><span id="line-194"> /**</span> |
| <span class="source-line-no">195</span><span id="line-195"> * Opens a mob file.</span> |
| <span class="source-line-no">196</span><span id="line-196"> * @param fs The current file system.</span> |
| <span class="source-line-no">197</span><span id="line-197"> * @param path The file path.</span> |
| <span class="source-line-no">198</span><span id="line-198"> * @param cacheConf The current MobCacheConfig</span> |
| <span class="source-line-no">199</span><span id="line-199"> * @return A opened mob file.</span> |
| <span class="source-line-no">200</span><span id="line-200"> */</span> |
| <span class="source-line-no">201</span><span id="line-201"> public MobFile openFile(FileSystem fs, Path path, CacheConfig cacheConf) throws IOException {</span> |
| <span class="source-line-no">202</span><span id="line-202"> if (!isCacheEnabled) {</span> |
| <span class="source-line-no">203</span><span id="line-203"> MobFile mobFile = MobFile.create(fs, path, conf, cacheConf);</span> |
| <span class="source-line-no">204</span><span id="line-204"> mobFile.open();</span> |
| <span class="source-line-no">205</span><span id="line-205"> return mobFile;</span> |
| <span class="source-line-no">206</span><span id="line-206"> } else {</span> |
| <span class="source-line-no">207</span><span id="line-207"> String fileName = path.getName();</span> |
| <span class="source-line-no">208</span><span id="line-208"> CachedMobFile cached = map.get(fileName);</span> |
| <span class="source-line-no">209</span><span id="line-209"> IdLock.Entry lockEntry = keyLock.getLockEntry(hashFileName(fileName));</span> |
| <span class="source-line-no">210</span><span id="line-210"> try {</span> |
| <span class="source-line-no">211</span><span id="line-211"> if (cached == null) {</span> |
| <span class="source-line-no">212</span><span id="line-212"> cached = map.get(fileName);</span> |
| <span class="source-line-no">213</span><span id="line-213"> if (cached == null) {</span> |
| <span class="source-line-no">214</span><span id="line-214"> if (map.size() > mobFileMaxCacheSize) {</span> |
| <span class="source-line-no">215</span><span id="line-215"> evict();</span> |
| <span class="source-line-no">216</span><span id="line-216"> }</span> |
| <span class="source-line-no">217</span><span id="line-217"> cached = CachedMobFile.create(fs, path, conf, cacheConf);</span> |
| <span class="source-line-no">218</span><span id="line-218"> cached.open();</span> |
| <span class="source-line-no">219</span><span id="line-219"> map.put(fileName, cached);</span> |
| <span class="source-line-no">220</span><span id="line-220"> miss.increment();</span> |
| <span class="source-line-no">221</span><span id="line-221"> }</span> |
| <span class="source-line-no">222</span><span id="line-222"> }</span> |
| <span class="source-line-no">223</span><span id="line-223"> cached.open();</span> |
| <span class="source-line-no">224</span><span id="line-224"> cached.access(count.incrementAndGet());</span> |
| <span class="source-line-no">225</span><span id="line-225"> } finally {</span> |
| <span class="source-line-no">226</span><span id="line-226"> keyLock.releaseLockEntry(lockEntry);</span> |
| <span class="source-line-no">227</span><span id="line-227"> }</span> |
| <span class="source-line-no">228</span><span id="line-228"> return cached;</span> |
| <span class="source-line-no">229</span><span id="line-229"> }</span> |
| <span class="source-line-no">230</span><span id="line-230"> }</span> |
| <span class="source-line-no">231</span><span id="line-231"></span> |
| <span class="source-line-no">232</span><span id="line-232"> /**</span> |
| <span class="source-line-no">233</span><span id="line-233"> * Closes a mob file.</span> |
| <span class="source-line-no">234</span><span id="line-234"> * @param file The mob file that needs to be closed.</span> |
| <span class="source-line-no">235</span><span id="line-235"> */</span> |
| <span class="source-line-no">236</span><span id="line-236"> public void closeFile(MobFile file) {</span> |
| <span class="source-line-no">237</span><span id="line-237"> IdLock.Entry lockEntry = null;</span> |
| <span class="source-line-no">238</span><span id="line-238"> try {</span> |
| <span class="source-line-no">239</span><span id="line-239"> if (!isCacheEnabled) {</span> |
| <span class="source-line-no">240</span><span id="line-240"> file.close();</span> |
| <span class="source-line-no">241</span><span id="line-241"> } else {</span> |
| <span class="source-line-no">242</span><span id="line-242"> lockEntry = keyLock.getLockEntry(hashFileName(file.getFileName()));</span> |
| <span class="source-line-no">243</span><span id="line-243"> file.close();</span> |
| <span class="source-line-no">244</span><span id="line-244"> }</span> |
| <span class="source-line-no">245</span><span id="line-245"> } catch (IOException e) {</span> |
| <span class="source-line-no">246</span><span id="line-246"> LOG.error("MobFileCache, Exception happen during close " + file.getFileName(), e);</span> |
| <span class="source-line-no">247</span><span id="line-247"> } finally {</span> |
| <span class="source-line-no">248</span><span id="line-248"> if (lockEntry != null) {</span> |
| <span class="source-line-no">249</span><span id="line-249"> keyLock.releaseLockEntry(lockEntry);</span> |
| <span class="source-line-no">250</span><span id="line-250"> }</span> |
| <span class="source-line-no">251</span><span id="line-251"> }</span> |
| <span class="source-line-no">252</span><span id="line-252"> }</span> |
| <span class="source-line-no">253</span><span id="line-253"></span> |
| <span class="source-line-no">254</span><span id="line-254"> public void shutdown() {</span> |
| <span class="source-line-no">255</span><span id="line-255"> this.scheduleThreadPool.shutdown();</span> |
| <span class="source-line-no">256</span><span id="line-256"> for (int i = 0; i < 100; i++) {</span> |
| <span class="source-line-no">257</span><span id="line-257"> if (!this.scheduleThreadPool.isShutdown()) {</span> |
| <span class="source-line-no">258</span><span id="line-258"> try {</span> |
| <span class="source-line-no">259</span><span id="line-259"> Thread.sleep(10);</span> |
| <span class="source-line-no">260</span><span id="line-260"> } catch (InterruptedException e) {</span> |
| <span class="source-line-no">261</span><span id="line-261"> LOG.warn("Interrupted while sleeping");</span> |
| <span class="source-line-no">262</span><span id="line-262"> Thread.currentThread().interrupt();</span> |
| <span class="source-line-no">263</span><span id="line-263"> break;</span> |
| <span class="source-line-no">264</span><span id="line-264"> }</span> |
| <span class="source-line-no">265</span><span id="line-265"> }</span> |
| <span class="source-line-no">266</span><span id="line-266"> }</span> |
| <span class="source-line-no">267</span><span id="line-267"></span> |
| <span class="source-line-no">268</span><span id="line-268"> if (!this.scheduleThreadPool.isShutdown()) {</span> |
| <span class="source-line-no">269</span><span id="line-269"> List<Runnable> runnables = this.scheduleThreadPool.shutdownNow();</span> |
| <span class="source-line-no">270</span><span id="line-270"> LOG.debug("Still running " + runnables);</span> |
| <span class="source-line-no">271</span><span id="line-271"> }</span> |
| <span class="source-line-no">272</span><span id="line-272"> }</span> |
| <span class="source-line-no">273</span><span id="line-273"></span> |
| <span class="source-line-no">274</span><span id="line-274"> /**</span> |
| <span class="source-line-no">275</span><span id="line-275"> * Gets the count of cached mob files.</span> |
| <span class="source-line-no">276</span><span id="line-276"> * @return The count of the cached mob files.</span> |
| <span class="source-line-no">277</span><span id="line-277"> */</span> |
| <span class="source-line-no">278</span><span id="line-278"> public int getCacheSize() {</span> |
| <span class="source-line-no">279</span><span id="line-279"> return map == null ? 0 : map.size();</span> |
| <span class="source-line-no">280</span><span id="line-280"> }</span> |
| <span class="source-line-no">281</span><span id="line-281"></span> |
| <span class="source-line-no">282</span><span id="line-282"> /**</span> |
| <span class="source-line-no">283</span><span id="line-283"> * Gets the count of accesses to the mob file cache.</span> |
| <span class="source-line-no">284</span><span id="line-284"> * @return The count of accesses to the mob file cache.</span> |
| <span class="source-line-no">285</span><span id="line-285"> */</span> |
| <span class="source-line-no">286</span><span id="line-286"> public long getAccessCount() {</span> |
| <span class="source-line-no">287</span><span id="line-287"> return count.get();</span> |
| <span class="source-line-no">288</span><span id="line-288"> }</span> |
| <span class="source-line-no">289</span><span id="line-289"></span> |
| <span class="source-line-no">290</span><span id="line-290"> /**</span> |
| <span class="source-line-no">291</span><span id="line-291"> * Gets the count of misses to the mob file cache.</span> |
| <span class="source-line-no">292</span><span id="line-292"> * @return The count of misses to the mob file cache.</span> |
| <span class="source-line-no">293</span><span id="line-293"> */</span> |
| <span class="source-line-no">294</span><span id="line-294"> public long getMissCount() {</span> |
| <span class="source-line-no">295</span><span id="line-295"> return miss.sum();</span> |
| <span class="source-line-no">296</span><span id="line-296"> }</span> |
| <span class="source-line-no">297</span><span id="line-297"></span> |
| <span class="source-line-no">298</span><span id="line-298"> /**</span> |
| <span class="source-line-no">299</span><span id="line-299"> * Gets the number of items evicted from the mob file cache.</span> |
| <span class="source-line-no">300</span><span id="line-300"> * @return The number of items evicted from the mob file cache.</span> |
| <span class="source-line-no">301</span><span id="line-301"> */</span> |
| <span class="source-line-no">302</span><span id="line-302"> public long getEvictedFileCount() {</span> |
| <span class="source-line-no">303</span><span id="line-303"> return evictedFileCount.sum();</span> |
| <span class="source-line-no">304</span><span id="line-304"> }</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"> * Gets the hit ratio to the mob file cache.</span> |
| <span class="source-line-no">308</span><span id="line-308"> * @return The hit ratio to the mob file cache.</span> |
| <span class="source-line-no">309</span><span id="line-309"> */</span> |
| <span class="source-line-no">310</span><span id="line-310"> public double getHitRatio() {</span> |
| <span class="source-line-no">311</span><span id="line-311"> return count.get() == 0 ? 0 : ((float) (count.get() - miss.sum())) / (float) count.get();</span> |
| <span class="source-line-no">312</span><span id="line-312"> }</span> |
| <span class="source-line-no">313</span><span id="line-313"></span> |
| <span class="source-line-no">314</span><span id="line-314"> /**</span> |
| <span class="source-line-no">315</span><span id="line-315"> * Prints the statistics.</span> |
| <span class="source-line-no">316</span><span id="line-316"> */</span> |
| <span class="source-line-no">317</span><span id="line-317"> public void printStatistics() {</span> |
| <span class="source-line-no">318</span><span id="line-318"> long access = count.get() - lastAccess;</span> |
| <span class="source-line-no">319</span><span id="line-319"> long missed = miss.sum() - lastMiss;</span> |
| <span class="source-line-no">320</span><span id="line-320"> long evicted = evictedFileCount.sum() - lastEvictedFileCount;</span> |
| <span class="source-line-no">321</span><span id="line-321"> int hitRatio = access == 0 ? 0 : (int) (((float) (access - missed)) / (float) access * 100);</span> |
| <span class="source-line-no">322</span><span id="line-322"> LOG.info("MobFileCache Statistics, access: " + access + ", miss: " + missed + ", hit: "</span> |
| <span class="source-line-no">323</span><span id="line-323"> + (access - missed) + ", hit ratio: " + hitRatio + "%, evicted files: " + evicted);</span> |
| <span class="source-line-no">324</span><span id="line-324"> lastAccess += access;</span> |
| <span class="source-line-no">325</span><span id="line-325"> lastMiss += missed;</span> |
| <span class="source-line-no">326</span><span id="line-326"> lastEvictedFileCount += evicted;</span> |
| <span class="source-line-no">327</span><span id="line-327"> }</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"> * Use murmurhash to reduce the conflicts of hashed file names. We should notice that the hash</span> |
| <span class="source-line-no">331</span><span id="line-331"> * conflicts may bring deadlocks, when opening mob files with evicting some other files, as</span> |
| <span class="source-line-no">332</span><span id="line-332"> * described in HBASE-28047.</span> |
| <span class="source-line-no">333</span><span id="line-333"> */</span> |
| <span class="source-line-no">334</span><span id="line-334"> private long hashFileName(String fileName) {</span> |
| <span class="source-line-no">335</span><span id="line-335"> return Hashing.murmur3_128().hashString(fileName, java.nio.charset.StandardCharsets.UTF_8)</span> |
| <span class="source-line-no">336</span><span id="line-336"> .asLong();</span> |
| <span class="source-line-no">337</span><span id="line-337"> }</span> |
| <span class="source-line-no">338</span><span id="line-338">}</span> |
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| </pre> |
| </div> |
| </main> |
| </body> |
| </html> |