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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 org.apache.hadoop.hbase.io.hfile.HFileBlock.FILL_HEADER;</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.io.IOException;</span> |
| <span class="source-line-no">023</span><span id="line-23">import java.nio.ByteBuffer;</span> |
| <span class="source-line-no">024</span><span id="line-24">import java.util.NavigableMap;</span> |
| <span class="source-line-no">025</span><span id="line-25">import java.util.NavigableSet;</span> |
| <span class="source-line-no">026</span><span id="line-26">import java.util.concurrent.ConcurrentSkipListMap;</span> |
| <span class="source-line-no">027</span><span id="line-27">import java.util.concurrent.ConcurrentSkipListSet;</span> |
| <span class="source-line-no">028</span><span id="line-28">import org.apache.hadoop.conf.Configuration;</span> |
| <span class="source-line-no">029</span><span id="line-29">import org.apache.hadoop.hbase.metrics.impl.FastLongHistogram;</span> |
| <span class="source-line-no">030</span><span id="line-30">import org.apache.hadoop.hbase.nio.ByteBuff;</span> |
| <span class="source-line-no">031</span><span id="line-31">import org.apache.hadoop.hbase.util.Bytes;</span> |
| <span class="source-line-no">032</span><span id="line-32">import org.apache.hadoop.hbase.util.ChecksumType;</span> |
| <span class="source-line-no">033</span><span id="line-33">import org.apache.hadoop.hbase.util.GsonUtil;</span> |
| <span class="source-line-no">034</span><span id="line-34">import org.apache.yetus.audience.InterfaceAudience;</span> |
| <span class="source-line-no">035</span><span id="line-35">import org.slf4j.Logger;</span> |
| <span class="source-line-no">036</span><span id="line-36">import org.slf4j.LoggerFactory;</span> |
| <span class="source-line-no">037</span><span id="line-37"></span> |
| <span class="source-line-no">038</span><span id="line-38">import org.apache.hbase.thirdparty.com.google.gson.Gson;</span> |
| <span class="source-line-no">039</span><span id="line-39">import org.apache.hbase.thirdparty.com.google.gson.TypeAdapter;</span> |
| <span class="source-line-no">040</span><span id="line-40">import org.apache.hbase.thirdparty.com.google.gson.stream.JsonReader;</span> |
| <span class="source-line-no">041</span><span id="line-41">import org.apache.hbase.thirdparty.com.google.gson.stream.JsonWriter;</span> |
| <span class="source-line-no">042</span><span id="line-42"></span> |
| <span class="source-line-no">043</span><span id="line-43">/**</span> |
| <span class="source-line-no">044</span><span id="line-44"> * Utilty for aggregating counts in CachedBlocks and toString/toJSON CachedBlocks and BlockCaches.</span> |
| <span class="source-line-no">045</span><span id="line-45"> * No attempt has been made at making this thread safe.</span> |
| <span class="source-line-no">046</span><span id="line-46"> */</span> |
| <span class="source-line-no">047</span><span id="line-47">@InterfaceAudience.Private</span> |
| <span class="source-line-no">048</span><span id="line-48">public class BlockCacheUtil {</span> |
| <span class="source-line-no">049</span><span id="line-49"></span> |
| <span class="source-line-no">050</span><span id="line-50"> private static final Logger LOG = LoggerFactory.getLogger(BlockCacheUtil.class);</span> |
| <span class="source-line-no">051</span><span id="line-51"></span> |
| <span class="source-line-no">052</span><span id="line-52"> public static final long NANOS_PER_SECOND = 1000000000;</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"> * Needed generating JSON.</span> |
| <span class="source-line-no">056</span><span id="line-56"> */</span> |
| <span class="source-line-no">057</span><span id="line-57"> private static final Gson GSON = GsonUtil.createGson()</span> |
| <span class="source-line-no">058</span><span id="line-58"> .registerTypeAdapter(FastLongHistogram.class, new TypeAdapter<FastLongHistogram>() {</span> |
| <span class="source-line-no">059</span><span id="line-59"></span> |
| <span class="source-line-no">060</span><span id="line-60"> @Override</span> |
| <span class="source-line-no">061</span><span id="line-61"> public void write(JsonWriter out, FastLongHistogram value) throws IOException {</span> |
| <span class="source-line-no">062</span><span id="line-62"> AgeSnapshot snapshot = new AgeSnapshot(value);</span> |
| <span class="source-line-no">063</span><span id="line-63"> out.beginObject();</span> |
| <span class="source-line-no">064</span><span id="line-64"> out.name("mean").value(snapshot.getMean());</span> |
| <span class="source-line-no">065</span><span id="line-65"> out.name("min").value(snapshot.getMin());</span> |
| <span class="source-line-no">066</span><span id="line-66"> out.name("max").value(snapshot.getMax());</span> |
| <span class="source-line-no">067</span><span id="line-67"> out.name("75thPercentile").value(snapshot.get75thPercentile());</span> |
| <span class="source-line-no">068</span><span id="line-68"> out.name("95thPercentile").value(snapshot.get95thPercentile());</span> |
| <span class="source-line-no">069</span><span id="line-69"> out.name("98thPercentile").value(snapshot.get98thPercentile());</span> |
| <span class="source-line-no">070</span><span id="line-70"> out.name("99thPercentile").value(snapshot.get99thPercentile());</span> |
| <span class="source-line-no">071</span><span id="line-71"> out.name("999thPercentile").value(snapshot.get999thPercentile());</span> |
| <span class="source-line-no">072</span><span id="line-72"> out.endObject();</span> |
| <span class="source-line-no">073</span><span id="line-73"> }</span> |
| <span class="source-line-no">074</span><span id="line-74"></span> |
| <span class="source-line-no">075</span><span id="line-75"> @Override</span> |
| <span class="source-line-no">076</span><span id="line-76"> public FastLongHistogram read(JsonReader in) throws IOException {</span> |
| <span class="source-line-no">077</span><span id="line-77"> throw new UnsupportedOperationException();</span> |
| <span class="source-line-no">078</span><span id="line-78"> }</span> |
| <span class="source-line-no">079</span><span id="line-79"> }).setPrettyPrinting().create();</span> |
| <span class="source-line-no">080</span><span id="line-80"></span> |
| <span class="source-line-no">081</span><span id="line-81"> /** Returns The block content as String. */</span> |
| <span class="source-line-no">082</span><span id="line-82"> public static String toString(final CachedBlock cb, final long now) {</span> |
| <span class="source-line-no">083</span><span id="line-83"> return "filename=" + cb.getFilename() + ", " + toStringMinusFileName(cb, now);</span> |
| <span class="source-line-no">084</span><span id="line-84"> }</span> |
| <span class="source-line-no">085</span><span id="line-85"></span> |
| <span class="source-line-no">086</span><span id="line-86"> /**</span> |
| <span class="source-line-no">087</span><span id="line-87"> * Little data structure to hold counts for a file. Used doing a toJSON.</span> |
| <span class="source-line-no">088</span><span id="line-88"> */</span> |
| <span class="source-line-no">089</span><span id="line-89"> static class CachedBlockCountsPerFile {</span> |
| <span class="source-line-no">090</span><span id="line-90"> private int count = 0;</span> |
| <span class="source-line-no">091</span><span id="line-91"> private long size = 0;</span> |
| <span class="source-line-no">092</span><span id="line-92"> private int countData = 0;</span> |
| <span class="source-line-no">093</span><span id="line-93"> private long sizeData = 0;</span> |
| <span class="source-line-no">094</span><span id="line-94"> private final String filename;</span> |
| <span class="source-line-no">095</span><span id="line-95"></span> |
| <span class="source-line-no">096</span><span id="line-96"> CachedBlockCountsPerFile(final String filename) {</span> |
| <span class="source-line-no">097</span><span id="line-97"> this.filename = filename;</span> |
| <span class="source-line-no">098</span><span id="line-98"> }</span> |
| <span class="source-line-no">099</span><span id="line-99"></span> |
| <span class="source-line-no">100</span><span id="line-100"> public int getCount() {</span> |
| <span class="source-line-no">101</span><span id="line-101"> return count;</span> |
| <span class="source-line-no">102</span><span id="line-102"> }</span> |
| <span class="source-line-no">103</span><span id="line-103"></span> |
| <span class="source-line-no">104</span><span id="line-104"> public long getSize() {</span> |
| <span class="source-line-no">105</span><span id="line-105"> return size;</span> |
| <span class="source-line-no">106</span><span id="line-106"> }</span> |
| <span class="source-line-no">107</span><span id="line-107"></span> |
| <span class="source-line-no">108</span><span id="line-108"> public int getCountData() {</span> |
| <span class="source-line-no">109</span><span id="line-109"> return countData;</span> |
| <span class="source-line-no">110</span><span id="line-110"> }</span> |
| <span class="source-line-no">111</span><span id="line-111"></span> |
| <span class="source-line-no">112</span><span id="line-112"> public long getSizeData() {</span> |
| <span class="source-line-no">113</span><span id="line-113"> return sizeData;</span> |
| <span class="source-line-no">114</span><span id="line-114"> }</span> |
| <span class="source-line-no">115</span><span id="line-115"></span> |
| <span class="source-line-no">116</span><span id="line-116"> public String getFilename() {</span> |
| <span class="source-line-no">117</span><span id="line-117"> return filename;</span> |
| <span class="source-line-no">118</span><span id="line-118"> }</span> |
| <span class="source-line-no">119</span><span id="line-119"> }</span> |
| <span class="source-line-no">120</span><span id="line-120"></span> |
| <span class="source-line-no">121</span><span id="line-121"> /** Returns A JSON String of <code>filename</code> and counts of <code>blocks</code> */</span> |
| <span class="source-line-no">122</span><span id="line-122"> public static String toJSON(String filename, NavigableSet<CachedBlock> blocks)</span> |
| <span class="source-line-no">123</span><span id="line-123"> throws IOException {</span> |
| <span class="source-line-no">124</span><span id="line-124"> CachedBlockCountsPerFile counts = new CachedBlockCountsPerFile(filename);</span> |
| <span class="source-line-no">125</span><span id="line-125"> for (CachedBlock cb : blocks) {</span> |
| <span class="source-line-no">126</span><span id="line-126"> counts.count++;</span> |
| <span class="source-line-no">127</span><span id="line-127"> counts.size += cb.getSize();</span> |
| <span class="source-line-no">128</span><span id="line-128"> BlockType bt = cb.getBlockType();</span> |
| <span class="source-line-no">129</span><span id="line-129"> if (bt != null && bt.isData()) {</span> |
| <span class="source-line-no">130</span><span id="line-130"> counts.countData++;</span> |
| <span class="source-line-no">131</span><span id="line-131"> counts.sizeData += cb.getSize();</span> |
| <span class="source-line-no">132</span><span id="line-132"> }</span> |
| <span class="source-line-no">133</span><span id="line-133"> }</span> |
| <span class="source-line-no">134</span><span id="line-134"> return GSON.toJson(counts);</span> |
| <span class="source-line-no">135</span><span id="line-135"> }</span> |
| <span class="source-line-no">136</span><span id="line-136"></span> |
| <span class="source-line-no">137</span><span id="line-137"> /** Returns JSON string of <code>cbsf</code> aggregated */</span> |
| <span class="source-line-no">138</span><span id="line-138"> public static String toJSON(CachedBlocksByFile cbsbf) throws IOException {</span> |
| <span class="source-line-no">139</span><span id="line-139"> return GSON.toJson(cbsbf);</span> |
| <span class="source-line-no">140</span><span id="line-140"> }</span> |
| <span class="source-line-no">141</span><span id="line-141"></span> |
| <span class="source-line-no">142</span><span id="line-142"> /** Returns JSON string of <code>bc</code> content. */</span> |
| <span class="source-line-no">143</span><span id="line-143"> public static String toJSON(BlockCache bc) throws IOException {</span> |
| <span class="source-line-no">144</span><span id="line-144"> return GSON.toJson(bc);</span> |
| <span class="source-line-no">145</span><span id="line-145"> }</span> |
| <span class="source-line-no">146</span><span id="line-146"></span> |
| <span class="source-line-no">147</span><span id="line-147"> /** Returns The block content of <code>bc</code> as a String minus the filename. */</span> |
| <span class="source-line-no">148</span><span id="line-148"> public static String toStringMinusFileName(final CachedBlock cb, final long now) {</span> |
| <span class="source-line-no">149</span><span id="line-149"> return "offset=" + cb.getOffset() + ", size=" + cb.getSize() + ", age="</span> |
| <span class="source-line-no">150</span><span id="line-150"> + (now - cb.getCachedTime()) + ", type=" + cb.getBlockType() + ", priority="</span> |
| <span class="source-line-no">151</span><span id="line-151"> + cb.getBlockPriority();</span> |
| <span class="source-line-no">152</span><span id="line-152"> }</span> |
| <span class="source-line-no">153</span><span id="line-153"></span> |
| <span class="source-line-no">154</span><span id="line-154"> /**</span> |
| <span class="source-line-no">155</span><span id="line-155"> * Get a {@link CachedBlocksByFile} instance and load it up by iterating content in</span> |
| <span class="source-line-no">156</span><span id="line-156"> * {@link BlockCache}.</span> |
| <span class="source-line-no">157</span><span id="line-157"> * @param conf Used to read configurations</span> |
| <span class="source-line-no">158</span><span id="line-158"> * @param bc Block Cache to iterate.</span> |
| <span class="source-line-no">159</span><span id="line-159"> * @return Laoded up instance of CachedBlocksByFile</span> |
| <span class="source-line-no">160</span><span id="line-160"> */</span> |
| <span class="source-line-no">161</span><span id="line-161"> public static CachedBlocksByFile getLoadedCachedBlocksByFile(final Configuration conf,</span> |
| <span class="source-line-no">162</span><span id="line-162"> final BlockCache bc) {</span> |
| <span class="source-line-no">163</span><span id="line-163"> CachedBlocksByFile cbsbf = new CachedBlocksByFile(conf);</span> |
| <span class="source-line-no">164</span><span id="line-164"> for (CachedBlock cb : bc) {</span> |
| <span class="source-line-no">165</span><span id="line-165"> if (cbsbf.update(cb)) break;</span> |
| <span class="source-line-no">166</span><span id="line-166"> }</span> |
| <span class="source-line-no">167</span><span id="line-167"> return cbsbf;</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"> private static int compareCacheBlock(Cacheable left, Cacheable right,</span> |
| <span class="source-line-no">171</span><span id="line-171"> boolean includeNextBlockMetadata) {</span> |
| <span class="source-line-no">172</span><span id="line-172"> ByteBuffer l = ByteBuffer.allocate(left.getSerializedLength());</span> |
| <span class="source-line-no">173</span><span id="line-173"> left.serialize(l, includeNextBlockMetadata);</span> |
| <span class="source-line-no">174</span><span id="line-174"> ByteBuffer r = ByteBuffer.allocate(right.getSerializedLength());</span> |
| <span class="source-line-no">175</span><span id="line-175"> right.serialize(r, includeNextBlockMetadata);</span> |
| <span class="source-line-no">176</span><span id="line-176"> return Bytes.compareTo(l.array(), l.arrayOffset(), l.limit(), r.array(), r.arrayOffset(),</span> |
| <span class="source-line-no">177</span><span id="line-177"> r.limit());</span> |
| <span class="source-line-no">178</span><span id="line-178"> }</span> |
| <span class="source-line-no">179</span><span id="line-179"></span> |
| <span class="source-line-no">180</span><span id="line-180"> /**</span> |
| <span class="source-line-no">181</span><span id="line-181"> * Validate that the existing and newBlock are the same without including the nextBlockMetadata,</span> |
| <span class="source-line-no">182</span><span id="line-182"> * if not, throw an exception. If they are the same without the nextBlockMetadata, return the</span> |
| <span class="source-line-no">183</span><span id="line-183"> * comparison.</span> |
| <span class="source-line-no">184</span><span id="line-184"> * @param existing block that is existing in the cache.</span> |
| <span class="source-line-no">185</span><span id="line-185"> * @param newBlock block that is trying to be cached.</span> |
| <span class="source-line-no">186</span><span id="line-186"> * @param cacheKey the cache key of the blocks.</span> |
| <span class="source-line-no">187</span><span id="line-187"> * @return comparison of the existing block to the newBlock.</span> |
| <span class="source-line-no">188</span><span id="line-188"> */</span> |
| <span class="source-line-no">189</span><span id="line-189"> public static int validateBlockAddition(Cacheable existing, Cacheable newBlock,</span> |
| <span class="source-line-no">190</span><span id="line-190"> BlockCacheKey cacheKey) {</span> |
| <span class="source-line-no">191</span><span id="line-191"> int comparison = compareCacheBlock(existing, newBlock, false);</span> |
| <span class="source-line-no">192</span><span id="line-192"> if (comparison != 0) {</span> |
| <span class="source-line-no">193</span><span id="line-193"> throw new RuntimeException(</span> |
| <span class="source-line-no">194</span><span id="line-194"> "Cached block contents differ, which should not have happened." + "cacheKey:" + cacheKey);</span> |
| <span class="source-line-no">195</span><span id="line-195"> }</span> |
| <span class="source-line-no">196</span><span id="line-196"> if ((existing instanceof HFileBlock) && (newBlock instanceof HFileBlock)) {</span> |
| <span class="source-line-no">197</span><span id="line-197"> comparison = ((HFileBlock) existing).getNextBlockOnDiskSize()</span> |
| <span class="source-line-no">198</span><span id="line-198"> - ((HFileBlock) newBlock).getNextBlockOnDiskSize();</span> |
| <span class="source-line-no">199</span><span id="line-199"> }</span> |
| <span class="source-line-no">200</span><span id="line-200"> return comparison;</span> |
| <span class="source-line-no">201</span><span id="line-201"> }</span> |
| <span class="source-line-no">202</span><span id="line-202"></span> |
| <span class="source-line-no">203</span><span id="line-203"> /**</span> |
| <span class="source-line-no">204</span><span id="line-204"> * Because of the region splitting, it's possible that the split key locate in the middle of a</span> |
| <span class="source-line-no">205</span><span id="line-205"> * block. So it's possible that both the daughter regions load the same block from their parent</span> |
| <span class="source-line-no">206</span><span id="line-206"> * HFile. When pread, we don't force the read to read all of the next block header. So when two</span> |
| <span class="source-line-no">207</span><span id="line-207"> * threads try to cache the same block, it's possible that one thread read all of the next block</span> |
| <span class="source-line-no">208</span><span id="line-208"> * header but the other one didn't. if the already cached block hasn't next block header but the</span> |
| <span class="source-line-no">209</span><span id="line-209"> * new block to cache has, then we can replace the existing block with the new block for better</span> |
| <span class="source-line-no">210</span><span id="line-210"> * performance.(HBASE-20447)</span> |
| <span class="source-line-no">211</span><span id="line-211"> * @param blockCache BlockCache to check</span> |
| <span class="source-line-no">212</span><span id="line-212"> * @param cacheKey the block cache key</span> |
| <span class="source-line-no">213</span><span id="line-213"> * @param newBlock the new block which try to put into the block cache.</span> |
| <span class="source-line-no">214</span><span id="line-214"> * @return true means need to replace existing block with new block for the same block cache key.</span> |
| <span class="source-line-no">215</span><span id="line-215"> * false means just keep the existing block.</span> |
| <span class="source-line-no">216</span><span id="line-216"> */</span> |
| <span class="source-line-no">217</span><span id="line-217"> public static boolean shouldReplaceExistingCacheBlock(BlockCache blockCache,</span> |
| <span class="source-line-no">218</span><span id="line-218"> BlockCacheKey cacheKey, Cacheable newBlock) {</span> |
| <span class="source-line-no">219</span><span id="line-219"> // NOTICE: The getBlock has retained the existingBlock inside.</span> |
| <span class="source-line-no">220</span><span id="line-220"> Cacheable existingBlock = blockCache.getBlock(cacheKey, false, false, false);</span> |
| <span class="source-line-no">221</span><span id="line-221"> if (existingBlock == null) {</span> |
| <span class="source-line-no">222</span><span id="line-222"> return true;</span> |
| <span class="source-line-no">223</span><span id="line-223"> }</span> |
| <span class="source-line-no">224</span><span id="line-224"> try {</span> |
| <span class="source-line-no">225</span><span id="line-225"> int comparison = BlockCacheUtil.validateBlockAddition(existingBlock, newBlock, cacheKey);</span> |
| <span class="source-line-no">226</span><span id="line-226"> if (comparison < 0) {</span> |
| <span class="source-line-no">227</span><span id="line-227"> LOG.warn("Cached block contents differ by nextBlockOnDiskSize, the new block has "</span> |
| <span class="source-line-no">228</span><span id="line-228"> + "nextBlockOnDiskSize set. Caching new block.");</span> |
| <span class="source-line-no">229</span><span id="line-229"> return true;</span> |
| <span class="source-line-no">230</span><span id="line-230"> } else if (comparison > 0) {</span> |
| <span class="source-line-no">231</span><span id="line-231"> LOG.warn("Cached block contents differ by nextBlockOnDiskSize, the existing block has "</span> |
| <span class="source-line-no">232</span><span id="line-232"> + "nextBlockOnDiskSize set, Keeping cached block.");</span> |
| <span class="source-line-no">233</span><span id="line-233"> return false;</span> |
| <span class="source-line-no">234</span><span id="line-234"> } else {</span> |
| <span class="source-line-no">235</span><span id="line-235"> LOG.debug("Caching an already cached block: {}. This is harmless and can happen in rare "</span> |
| <span class="source-line-no">236</span><span id="line-236"> + "cases (see HBASE-8547)", cacheKey);</span> |
| <span class="source-line-no">237</span><span id="line-237"> return false;</span> |
| <span class="source-line-no">238</span><span id="line-238"> }</span> |
| <span class="source-line-no">239</span><span id="line-239"> } finally {</span> |
| <span class="source-line-no">240</span><span id="line-240"> // Release this block to decrement the reference count.</span> |
| <span class="source-line-no">241</span><span id="line-241"> existingBlock.release();</span> |
| <span class="source-line-no">242</span><span id="line-242"> }</span> |
| <span class="source-line-no">243</span><span id="line-243"> }</span> |
| <span class="source-line-no">244</span><span id="line-244"></span> |
| <span class="source-line-no">245</span><span id="line-245"> private static final int DEFAULT_MAX = 1000000;</span> |
| <span class="source-line-no">246</span><span id="line-246"></span> |
| <span class="source-line-no">247</span><span id="line-247"> public static int getMaxCachedBlocksByFile(Configuration conf) {</span> |
| <span class="source-line-no">248</span><span id="line-248"> return conf == null ? DEFAULT_MAX : conf.getInt("hbase.ui.blockcache.by.file.max", DEFAULT_MAX);</span> |
| <span class="source-line-no">249</span><span id="line-249"> }</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"> * Similarly to HFileBlock.Writer.getBlockForCaching(), creates a HFileBlock instance without</span> |
| <span class="source-line-no">253</span><span id="line-253"> * checksum for caching. This is needed for when we cache blocks via readers (either prefetch or</span> |
| <span class="source-line-no">254</span><span id="line-254"> * client read), otherwise we may fail equality comparison when checking against same block that</span> |
| <span class="source-line-no">255</span><span id="line-255"> * may already have been cached at write time.</span> |
| <span class="source-line-no">256</span><span id="line-256"> * @param cacheConf the related CacheConfig object.</span> |
| <span class="source-line-no">257</span><span id="line-257"> * @param block the HFileBlock instance to be converted.</span> |
| <span class="source-line-no">258</span><span id="line-258"> * @return the resulting HFileBlock instance without checksum.</span> |
| <span class="source-line-no">259</span><span id="line-259"> */</span> |
| <span class="source-line-no">260</span><span id="line-260"> public static HFileBlock getBlockForCaching(CacheConfig cacheConf, HFileBlock block) {</span> |
| <span class="source-line-no">261</span><span id="line-261"> // Calculate how many bytes we need for checksum on the tail of the block.</span> |
| <span class="source-line-no">262</span><span id="line-262"> int numBytes = cacheConf.shouldCacheCompressed(block.getBlockType().getCategory())</span> |
| <span class="source-line-no">263</span><span id="line-263"> ? 0</span> |
| <span class="source-line-no">264</span><span id="line-264"> : (int) ChecksumUtil.numBytes(block.getOnDiskDataSizeWithHeader(),</span> |
| <span class="source-line-no">265</span><span id="line-265"> block.getHFileContext().getBytesPerChecksum());</span> |
| <span class="source-line-no">266</span><span id="line-266"> ByteBuff buff = block.getBufferReadOnly();</span> |
| <span class="source-line-no">267</span><span id="line-267"> HFileBlockBuilder builder = new HFileBlockBuilder();</span> |
| <span class="source-line-no">268</span><span id="line-268"> return builder.withBlockType(block.getBlockType())</span> |
| <span class="source-line-no">269</span><span id="line-269"> .withOnDiskSizeWithoutHeader(block.getOnDiskSizeWithoutHeader())</span> |
| <span class="source-line-no">270</span><span id="line-270"> .withUncompressedSizeWithoutHeader(block.getUncompressedSizeWithoutHeader())</span> |
| <span class="source-line-no">271</span><span id="line-271"> .withPrevBlockOffset(block.getPrevBlockOffset()).withByteBuff(buff)</span> |
| <span class="source-line-no">272</span><span id="line-272"> .withFillHeader(FILL_HEADER).withOffset(block.getOffset()).withNextBlockOnDiskSize(-1)</span> |
| <span class="source-line-no">273</span><span id="line-273"> .withOnDiskDataSizeWithHeader(block.getOnDiskDataSizeWithHeader() + numBytes)</span> |
| <span class="source-line-no">274</span><span id="line-274"> .withHFileContext(cloneContext(block.getHFileContext()))</span> |
| <span class="source-line-no">275</span><span id="line-275"> .withByteBuffAllocator(cacheConf.getByteBuffAllocator()).withShared(!buff.hasArray()).build();</span> |
| <span class="source-line-no">276</span><span id="line-276"> }</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 static HFileContext cloneContext(HFileContext context) {</span> |
| <span class="source-line-no">279</span><span id="line-279"> HFileContext newContext = new HFileContextBuilder().withBlockSize(context.getBlocksize())</span> |
| <span class="source-line-no">280</span><span id="line-280"> .withBytesPerCheckSum(0).withChecksumType(ChecksumType.NULL) // no checksums in cached data</span> |
| <span class="source-line-no">281</span><span id="line-281"> .withCompression(context.getCompression())</span> |
| <span class="source-line-no">282</span><span id="line-282"> .withDataBlockEncoding(context.getDataBlockEncoding())</span> |
| <span class="source-line-no">283</span><span id="line-283"> .withHBaseCheckSum(context.isUseHBaseChecksum()).withCompressTags(context.isCompressTags())</span> |
| <span class="source-line-no">284</span><span id="line-284"> .withIncludesMvcc(context.isIncludesMvcc()).withIncludesTags(context.isIncludesTags())</span> |
| <span class="source-line-no">285</span><span id="line-285"> .withColumnFamily(context.getColumnFamily()).withTableName(context.getTableName()).build();</span> |
| <span class="source-line-no">286</span><span id="line-286"> return newContext;</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"> /**</span> |
| <span class="source-line-no">290</span><span id="line-290"> * Use one of these to keep a running account of cached blocks by file. Throw it away when done.</span> |
| <span class="source-line-no">291</span><span id="line-291"> * This is different than metrics in that it is stats on current state of a cache. See</span> |
| <span class="source-line-no">292</span><span id="line-292"> * getLoadedCachedBlocksByFile</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 static class CachedBlocksByFile {</span> |
| <span class="source-line-no">295</span><span id="line-295"> private int count;</span> |
| <span class="source-line-no">296</span><span id="line-296"> private int dataBlockCount;</span> |
| <span class="source-line-no">297</span><span id="line-297"> private long size;</span> |
| <span class="source-line-no">298</span><span id="line-298"> private long dataSize;</span> |
| <span class="source-line-no">299</span><span id="line-299"> private final long now = System.nanoTime();</span> |
| <span class="source-line-no">300</span><span id="line-300"> /**</span> |
| <span class="source-line-no">301</span><span id="line-301"> * How many blocks to look at before we give up. There could be many millions of blocks. We</span> |
| <span class="source-line-no">302</span><span id="line-302"> * don't want the ui to freeze while we run through 1B blocks... users will think hbase dead. UI</span> |
| <span class="source-line-no">303</span><span id="line-303"> * displays warning in red when stats are incomplete.</span> |
| <span class="source-line-no">304</span><span id="line-304"> */</span> |
| <span class="source-line-no">305</span><span id="line-305"> private final int max;</span> |
| <span class="source-line-no">306</span><span id="line-306"></span> |
| <span class="source-line-no">307</span><span id="line-307"> CachedBlocksByFile() {</span> |
| <span class="source-line-no">308</span><span id="line-308"> this(null);</span> |
| <span class="source-line-no">309</span><span id="line-309"> }</span> |
| <span class="source-line-no">310</span><span id="line-310"></span> |
| <span class="source-line-no">311</span><span id="line-311"> CachedBlocksByFile(final Configuration c) {</span> |
| <span class="source-line-no">312</span><span id="line-312"> this.max = getMaxCachedBlocksByFile(c);</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"> /**</span> |
| <span class="source-line-no">316</span><span id="line-316"> * Map by filename. use concurent utils because we want our Map and contained blocks sorted.</span> |
| <span class="source-line-no">317</span><span id="line-317"> */</span> |
| <span class="source-line-no">318</span><span id="line-318"> private transient NavigableMap<String, NavigableSet<CachedBlock>> cachedBlockByFile =</span> |
| <span class="source-line-no">319</span><span id="line-319"> new ConcurrentSkipListMap<>();</span> |
| <span class="source-line-no">320</span><span id="line-320"> FastLongHistogram hist = new FastLongHistogram();</span> |
| <span class="source-line-no">321</span><span id="line-321"></span> |
| <span class="source-line-no">322</span><span id="line-322"> /** Returns True if full.... if we won't be adding any more. */</span> |
| <span class="source-line-no">323</span><span id="line-323"> public boolean update(final CachedBlock cb) {</span> |
| <span class="source-line-no">324</span><span id="line-324"> if (isFull()) return true;</span> |
| <span class="source-line-no">325</span><span id="line-325"> NavigableSet<CachedBlock> set = this.cachedBlockByFile.get(cb.getFilename());</span> |
| <span class="source-line-no">326</span><span id="line-326"> if (set == null) {</span> |
| <span class="source-line-no">327</span><span id="line-327"> set = new ConcurrentSkipListSet<>();</span> |
| <span class="source-line-no">328</span><span id="line-328"> this.cachedBlockByFile.put(cb.getFilename(), set);</span> |
| <span class="source-line-no">329</span><span id="line-329"> }</span> |
| <span class="source-line-no">330</span><span id="line-330"> set.add(cb);</span> |
| <span class="source-line-no">331</span><span id="line-331"> this.size += cb.getSize();</span> |
| <span class="source-line-no">332</span><span id="line-332"> this.count++;</span> |
| <span class="source-line-no">333</span><span id="line-333"> BlockType bt = cb.getBlockType();</span> |
| <span class="source-line-no">334</span><span id="line-334"> if (bt != null && bt.isData()) {</span> |
| <span class="source-line-no">335</span><span id="line-335"> this.dataBlockCount++;</span> |
| <span class="source-line-no">336</span><span id="line-336"> this.dataSize += cb.getSize();</span> |
| <span class="source-line-no">337</span><span id="line-337"> }</span> |
| <span class="source-line-no">338</span><span id="line-338"> long age = (this.now - cb.getCachedTime()) / NANOS_PER_SECOND;</span> |
| <span class="source-line-no">339</span><span id="line-339"> this.hist.add(age, 1);</span> |
| <span class="source-line-no">340</span><span id="line-340"> return false;</span> |
| <span class="source-line-no">341</span><span id="line-341"> }</span> |
| <span class="source-line-no">342</span><span id="line-342"></span> |
| <span class="source-line-no">343</span><span id="line-343"> /**</span> |
| <span class="source-line-no">344</span><span id="line-344"> * @return True if full; i.e. there are more items in the cache but we only loaded up the</span> |
| <span class="source-line-no">345</span><span id="line-345"> * maximum set in configuration <code>hbase.ui.blockcache.by.file.max</code> (Default:</span> |
| <span class="source-line-no">346</span><span id="line-346"> * DEFAULT_MAX).</span> |
| <span class="source-line-no">347</span><span id="line-347"> */</span> |
| <span class="source-line-no">348</span><span id="line-348"> public boolean isFull() {</span> |
| <span class="source-line-no">349</span><span id="line-349"> return this.count >= this.max;</span> |
| <span class="source-line-no">350</span><span id="line-350"> }</span> |
| <span class="source-line-no">351</span><span id="line-351"></span> |
| <span class="source-line-no">352</span><span id="line-352"> public NavigableMap<String, NavigableSet<CachedBlock>> getCachedBlockStatsByFile() {</span> |
| <span class="source-line-no">353</span><span id="line-353"> return this.cachedBlockByFile;</span> |
| <span class="source-line-no">354</span><span id="line-354"> }</span> |
| <span class="source-line-no">355</span><span id="line-355"></span> |
| <span class="source-line-no">356</span><span id="line-356"> /** Returns count of blocks in the cache */</span> |
| <span class="source-line-no">357</span><span id="line-357"> public int getCount() {</span> |
| <span class="source-line-no">358</span><span id="line-358"> return count;</span> |
| <span class="source-line-no">359</span><span id="line-359"> }</span> |
| <span class="source-line-no">360</span><span id="line-360"></span> |
| <span class="source-line-no">361</span><span id="line-361"> public int getDataCount() {</span> |
| <span class="source-line-no">362</span><span id="line-362"> return dataBlockCount;</span> |
| <span class="source-line-no">363</span><span id="line-363"> }</span> |
| <span class="source-line-no">364</span><span id="line-364"></span> |
| <span class="source-line-no">365</span><span id="line-365"> /** Returns size of blocks in the cache */</span> |
| <span class="source-line-no">366</span><span id="line-366"> public long getSize() {</span> |
| <span class="source-line-no">367</span><span id="line-367"> return size;</span> |
| <span class="source-line-no">368</span><span id="line-368"> }</span> |
| <span class="source-line-no">369</span><span id="line-369"></span> |
| <span class="source-line-no">370</span><span id="line-370"> /** Returns Size of data. */</span> |
| <span class="source-line-no">371</span><span id="line-371"> public long getDataSize() {</span> |
| <span class="source-line-no">372</span><span id="line-372"> return dataSize;</span> |
| <span class="source-line-no">373</span><span id="line-373"> }</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 AgeSnapshot getAgeInCacheSnapshot() {</span> |
| <span class="source-line-no">376</span><span id="line-376"> return new AgeSnapshot(this.hist);</span> |
| <span class="source-line-no">377</span><span id="line-377"> }</span> |
| <span class="source-line-no">378</span><span id="line-378"></span> |
| <span class="source-line-no">379</span><span id="line-379"> @Override</span> |
| <span class="source-line-no">380</span><span id="line-380"> public String toString() {</span> |
| <span class="source-line-no">381</span><span id="line-381"> AgeSnapshot snapshot = getAgeInCacheSnapshot();</span> |
| <span class="source-line-no">382</span><span id="line-382"> return "count=" + count + ", dataBlockCount=" + dataBlockCount + ", size=" + size</span> |
| <span class="source-line-no">383</span><span id="line-383"> + ", dataSize=" + getDataSize() + ", mean age=" + snapshot.getMean() + ", min age="</span> |
| <span class="source-line-no">384</span><span id="line-384"> + snapshot.getMin() + ", max age=" + snapshot.getMax() + ", 75th percentile age="</span> |
| <span class="source-line-no">385</span><span id="line-385"> + snapshot.get75thPercentile() + ", 95th percentile age=" + snapshot.get95thPercentile()</span> |
| <span class="source-line-no">386</span><span id="line-386"> + ", 98th percentile age=" + snapshot.get98thPercentile() + ", 99th percentile age="</span> |
| <span class="source-line-no">387</span><span id="line-387"> + snapshot.get99thPercentile() + ", 99.9th percentile age=" + snapshot.get99thPercentile();</span> |
| <span class="source-line-no">388</span><span id="line-388"> }</span> |
| <span class="source-line-no">389</span><span id="line-389"> }</span> |
| <span class="source-line-no">390</span><span id="line-390">}</span> |
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| </main> |
| </body> |
| </html> |
