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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.regionserver;</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.lang.management.ManagementFactory;</span> |
| <span class="source-line-no">022</span><span id="line-22">import java.lang.management.RuntimeMXBean;</span> |
| <span class="source-line-no">023</span><span id="line-23">import java.util.ArrayList;</span> |
| <span class="source-line-no">024</span><span id="line-24">import java.util.List;</span> |
| <span class="source-line-no">025</span><span id="line-25">import org.apache.hadoop.conf.Configuration;</span> |
| <span class="source-line-no">026</span><span id="line-26">import org.apache.hadoop.hbase.Cell;</span> |
| <span class="source-line-no">027</span><span id="line-27">import org.apache.hadoop.hbase.CellComparator;</span> |
| <span class="source-line-no">028</span><span id="line-28">import org.apache.hadoop.hbase.ExtendedCell;</span> |
| <span class="source-line-no">029</span><span id="line-29">import org.apache.hadoop.hbase.HBaseConfiguration;</span> |
| <span class="source-line-no">030</span><span id="line-30">import org.apache.hadoop.hbase.HConstants;</span> |
| <span class="source-line-no">031</span><span id="line-31">import org.apache.hadoop.hbase.InnerStoreCellComparator;</span> |
| <span class="source-line-no">032</span><span id="line-32">import org.apache.hadoop.hbase.KeyValue;</span> |
| <span class="source-line-no">033</span><span id="line-33">import org.apache.hadoop.hbase.util.Bytes;</span> |
| <span class="source-line-no">034</span><span id="line-34">import org.apache.hadoop.hbase.util.ClassSize;</span> |
| <span class="source-line-no">035</span><span id="line-35">import org.apache.hadoop.hbase.util.EnvironmentEdgeManager;</span> |
| <span class="source-line-no">036</span><span id="line-36">import org.apache.yetus.audience.InterfaceAudience;</span> |
| <span class="source-line-no">037</span><span id="line-37">import org.slf4j.Logger;</span> |
| <span class="source-line-no">038</span><span id="line-38">import org.slf4j.LoggerFactory;</span> |
| <span class="source-line-no">039</span><span id="line-39"></span> |
| <span class="source-line-no">040</span><span id="line-40">/**</span> |
| <span class="source-line-no">041</span><span id="line-41"> * The MemStore holds in-memory modifications to the Store. Modifications are {@link Cell}s. When</span> |
| <span class="source-line-no">042</span><span id="line-42"> * asked to flush, current memstore is moved to snapshot and is cleared. We continue to serve edits</span> |
| <span class="source-line-no">043</span><span id="line-43"> * out of new memstore and backing snapshot until flusher reports in that the flush succeeded. At</span> |
| <span class="source-line-no">044</span><span id="line-44"> * this point we let the snapshot go.</span> |
| <span class="source-line-no">045</span><span id="line-45"> * <p></span> |
| <span class="source-line-no">046</span><span id="line-46"> * The MemStore functions should not be called in parallel. Callers should hold write and read</span> |
| <span class="source-line-no">047</span><span id="line-47"> * locks. This is done in {@link HStore}.</span> |
| <span class="source-line-no">048</span><span id="line-48"> * </p></span> |
| <span class="source-line-no">049</span><span id="line-49"> * TODO: Adjust size of the memstore when we remove items because they have been deleted. TODO: With</span> |
| <span class="source-line-no">050</span><span id="line-50"> * new KVSLS, need to make sure we update HeapSize with difference in KV size.</span> |
| <span class="source-line-no">051</span><span id="line-51"> */</span> |
| <span class="source-line-no">052</span><span id="line-52">@InterfaceAudience.Private</span> |
| <span class="source-line-no">053</span><span id="line-53">public class DefaultMemStore extends AbstractMemStore {</span> |
| <span class="source-line-no">054</span><span id="line-54"> private static final Logger LOG = LoggerFactory.getLogger(DefaultMemStore.class);</span> |
| <span class="source-line-no">055</span><span id="line-55"></span> |
| <span class="source-line-no">056</span><span id="line-56"> public final static long DEEP_OVERHEAD = ClassSize.align(AbstractMemStore.DEEP_OVERHEAD);</span> |
| <span class="source-line-no">057</span><span id="line-57"> public final static long FIXED_OVERHEAD = ClassSize.align(AbstractMemStore.FIXED_OVERHEAD);</span> |
| <span class="source-line-no">058</span><span id="line-58"></span> |
| <span class="source-line-no">059</span><span id="line-59"> /**</span> |
| <span class="source-line-no">060</span><span id="line-60"> * Default constructor. Used for tests.</span> |
| <span class="source-line-no">061</span><span id="line-61"> */</span> |
| <span class="source-line-no">062</span><span id="line-62"> public DefaultMemStore() {</span> |
| <span class="source-line-no">063</span><span id="line-63"> this(HBaseConfiguration.create(), InnerStoreCellComparator.INNER_STORE_COMPARATOR, null);</span> |
| <span class="source-line-no">064</span><span id="line-64"> }</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"> * Constructor.</span> |
| <span class="source-line-no">068</span><span id="line-68"> * @param c Comparator</span> |
| <span class="source-line-no">069</span><span id="line-69"> */</span> |
| <span class="source-line-no">070</span><span id="line-70"> public DefaultMemStore(final Configuration conf, final CellComparator c) {</span> |
| <span class="source-line-no">071</span><span id="line-71"> super(conf, c, null);</span> |
| <span class="source-line-no">072</span><span id="line-72"> }</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"> * Constructor.</span> |
| <span class="source-line-no">076</span><span id="line-76"> * @param c Comparator</span> |
| <span class="source-line-no">077</span><span id="line-77"> */</span> |
| <span class="source-line-no">078</span><span id="line-78"> public DefaultMemStore(final Configuration conf, final CellComparator c,</span> |
| <span class="source-line-no">079</span><span id="line-79"> final RegionServicesForStores regionServices) {</span> |
| <span class="source-line-no">080</span><span id="line-80"> super(conf, c, regionServices);</span> |
| <span class="source-line-no">081</span><span id="line-81"> }</span> |
| <span class="source-line-no">082</span><span id="line-82"></span> |
| <span class="source-line-no">083</span><span id="line-83"> /**</span> |
| <span class="source-line-no">084</span><span id="line-84"> * Creates a snapshot of the current memstore. Snapshot must be cleared by call to</span> |
| <span class="source-line-no">085</span><span id="line-85"> * {@link #clearSnapshot(long)}</span> |
| <span class="source-line-no">086</span><span id="line-86"> */</span> |
| <span class="source-line-no">087</span><span id="line-87"> @Override</span> |
| <span class="source-line-no">088</span><span id="line-88"> public MemStoreSnapshot snapshot() {</span> |
| <span class="source-line-no">089</span><span id="line-89"> // If snapshot currently has entries, then flusher failed or didn't call</span> |
| <span class="source-line-no">090</span><span id="line-90"> // cleanup. Log a warning.</span> |
| <span class="source-line-no">091</span><span id="line-91"> if (!this.snapshot.isEmpty()) {</span> |
| <span class="source-line-no">092</span><span id="line-92"> LOG.warn("Snapshot called again without clearing previous. "</span> |
| <span class="source-line-no">093</span><span id="line-93"> + "Doing nothing. Another ongoing flush or did we fail last attempt?");</span> |
| <span class="source-line-no">094</span><span id="line-94"> } else {</span> |
| <span class="source-line-no">095</span><span id="line-95"> this.snapshotId = EnvironmentEdgeManager.currentTime();</span> |
| <span class="source-line-no">096</span><span id="line-96"> if (!getActive().isEmpty()) {</span> |
| <span class="source-line-no">097</span><span id="line-97"> // Record the ImmutableSegment' heap overhead when initialing</span> |
| <span class="source-line-no">098</span><span id="line-98"> MemStoreSizing memstoreAccounting = new NonThreadSafeMemStoreSizing();</span> |
| <span class="source-line-no">099</span><span id="line-99"> ImmutableSegment immutableSegment =</span> |
| <span class="source-line-no">100</span><span id="line-100"> SegmentFactory.instance().createImmutableSegment(getActive(), memstoreAccounting);</span> |
| <span class="source-line-no">101</span><span id="line-101"> // regionServices can be null when testing</span> |
| <span class="source-line-no">102</span><span id="line-102"> if (regionServices != null) {</span> |
| <span class="source-line-no">103</span><span id="line-103"> regionServices.addMemStoreSize(memstoreAccounting.getDataSize(),</span> |
| <span class="source-line-no">104</span><span id="line-104"> memstoreAccounting.getHeapSize(), memstoreAccounting.getOffHeapSize(),</span> |
| <span class="source-line-no">105</span><span id="line-105"> memstoreAccounting.getCellsCount());</span> |
| <span class="source-line-no">106</span><span id="line-106"> }</span> |
| <span class="source-line-no">107</span><span id="line-107"> this.snapshot = immutableSegment;</span> |
| <span class="source-line-no">108</span><span id="line-108"> resetActive();</span> |
| <span class="source-line-no">109</span><span id="line-109"> resetTimeOfOldestEdit();</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"> return new MemStoreSnapshot(this.snapshotId, this.snapshot);</span> |
| <span class="source-line-no">113</span><span id="line-113"> }</span> |
| <span class="source-line-no">114</span><span id="line-114"></span> |
| <span class="source-line-no">115</span><span id="line-115"> @Override</span> |
| <span class="source-line-no">116</span><span id="line-116"> public MemStoreSize getFlushableSize() {</span> |
| <span class="source-line-no">117</span><span id="line-117"> MemStoreSize mss = getSnapshotSize();</span> |
| <span class="source-line-no">118</span><span id="line-118"> return mss.getDataSize() > 0 ? mss : getActive().getMemStoreSize();</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"> @Override</span> |
| <span class="source-line-no">122</span><span id="line-122"> protected long keySize() {</span> |
| <span class="source-line-no">123</span><span id="line-123"> return getActive().getDataSize();</span> |
| <span class="source-line-no">124</span><span id="line-124"> }</span> |
| <span class="source-line-no">125</span><span id="line-125"></span> |
| <span class="source-line-no">126</span><span id="line-126"> @Override</span> |
| <span class="source-line-no">127</span><span id="line-127"> protected long heapSize() {</span> |
| <span class="source-line-no">128</span><span id="line-128"> return getActive().getHeapSize();</span> |
| <span class="source-line-no">129</span><span id="line-129"> }</span> |
| <span class="source-line-no">130</span><span id="line-130"></span> |
| <span class="source-line-no">131</span><span id="line-131"> @Override</span> |
| <span class="source-line-no">132</span><span id="line-132"> /**</span> |
| <span class="source-line-no">133</span><span id="line-133"> * This method is protected under {@link HStore#lock} read lock. <br/></span> |
| <span class="source-line-no">134</span><span id="line-134"> * Scanners are ordered from 0 (oldest) to newest in increasing order.</span> |
| <span class="source-line-no">135</span><span id="line-135"> */</span> |
| <span class="source-line-no">136</span><span id="line-136"> public List<KeyValueScanner> getScanners(long readPt) throws IOException {</span> |
| <span class="source-line-no">137</span><span id="line-137"> List<KeyValueScanner> list = new ArrayList<>();</span> |
| <span class="source-line-no">138</span><span id="line-138"> addToScanners(getActive(), readPt, list);</span> |
| <span class="source-line-no">139</span><span id="line-139"> addToScanners(getSnapshotSegments(), readPt, list);</span> |
| <span class="source-line-no">140</span><span id="line-140"> return list;</span> |
| <span class="source-line-no">141</span><span id="line-141"> }</span> |
| <span class="source-line-no">142</span><span id="line-142"></span> |
| <span class="source-line-no">143</span><span id="line-143"> protected List<Segment> getSnapshotSegments() {</span> |
| <span class="source-line-no">144</span><span id="line-144"> return snapshot.getAllSegments();</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"> @Override</span> |
| <span class="source-line-no">148</span><span id="line-148"> protected List<Segment> getSegments() throws IOException {</span> |
| <span class="source-line-no">149</span><span id="line-149"> List<Segment> list = new ArrayList<>(2);</span> |
| <span class="source-line-no">150</span><span id="line-150"> list.add(getActive());</span> |
| <span class="source-line-no">151</span><span id="line-151"> list.add(snapshot);</span> |
| <span class="source-line-no">152</span><span id="line-152"> return list;</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"> /**</span> |
| <span class="source-line-no">156</span><span id="line-156"> * @param cell Find the row that comes after this one. If null, we return the first.</span> |
| <span class="source-line-no">157</span><span id="line-157"> * @return Next row or null if none found.</span> |
| <span class="source-line-no">158</span><span id="line-158"> */</span> |
| <span class="source-line-no">159</span><span id="line-159"> ExtendedCell getNextRow(final ExtendedCell cell) {</span> |
| <span class="source-line-no">160</span><span id="line-160"> return getLowest(getNextRow(cell, this.getActive().getCellSet()),</span> |
| <span class="source-line-no">161</span><span id="line-161"> getNextRow(cell, this.snapshot.getCellSet()));</span> |
| <span class="source-line-no">162</span><span id="line-162"> }</span> |
| <span class="source-line-no">163</span><span id="line-163"></span> |
| <span class="source-line-no">164</span><span id="line-164"> @Override</span> |
| <span class="source-line-no">165</span><span id="line-165"> public void updateLowestUnflushedSequenceIdInWAL(boolean onlyIfMoreRecent) {</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"> @Override</span> |
| <span class="source-line-no">169</span><span id="line-169"> protected boolean preUpdate(MutableSegment currentActive, ExtendedCell cell,</span> |
| <span class="source-line-no">170</span><span id="line-170"> MemStoreSizing memstoreSizing) {</span> |
| <span class="source-line-no">171</span><span id="line-171"> return true;</span> |
| <span class="source-line-no">172</span><span id="line-172"> }</span> |
| <span class="source-line-no">173</span><span id="line-173"></span> |
| <span class="source-line-no">174</span><span id="line-174"> @Override</span> |
| <span class="source-line-no">175</span><span id="line-175"> protected void postUpdate(MutableSegment currentActive) {</span> |
| <span class="source-line-no">176</span><span id="line-176"> return;</span> |
| <span class="source-line-no">177</span><span id="line-177"> }</span> |
| <span class="source-line-no">178</span><span id="line-178"></span> |
| <span class="source-line-no">179</span><span id="line-179"> @Override</span> |
| <span class="source-line-no">180</span><span id="line-180"> protected boolean sizeAddedPreOperation() {</span> |
| <span class="source-line-no">181</span><span id="line-181"> return false;</span> |
| <span class="source-line-no">182</span><span id="line-182"> }</span> |
| <span class="source-line-no">183</span><span id="line-183"></span> |
| <span class="source-line-no">184</span><span id="line-184"> @Override</span> |
| <span class="source-line-no">185</span><span id="line-185"> public MemStoreSize size() {</span> |
| <span class="source-line-no">186</span><span id="line-186"> return getActive().getMemStoreSize();</span> |
| <span class="source-line-no">187</span><span id="line-187"> }</span> |
| <span class="source-line-no">188</span><span id="line-188"></span> |
| <span class="source-line-no">189</span><span id="line-189"> @Override</span> |
| <span class="source-line-no">190</span><span id="line-190"> public long preFlushSeqIDEstimation() {</span> |
| <span class="source-line-no">191</span><span id="line-191"> return HConstants.NO_SEQNUM;</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"> @Override</span> |
| <span class="source-line-no">195</span><span id="line-195"> public boolean isSloppy() {</span> |
| <span class="source-line-no">196</span><span id="line-196"> return false;</span> |
| <span class="source-line-no">197</span><span id="line-197"> }</span> |
| <span class="source-line-no">198</span><span id="line-198"></span> |
| <span class="source-line-no">199</span><span id="line-199"> /**</span> |
| <span class="source-line-no">200</span><span id="line-200"> * Code to help figure if our approximation of object heap sizes is close enough. See hbase-900.</span> |
| <span class="source-line-no">201</span><span id="line-201"> * Fills memstores then waits so user can heap dump and bring up resultant hprof in something like</span> |
| <span class="source-line-no">202</span><span id="line-202"> * jprofiler which allows you get 'deep size' on objects.</span> |
| <span class="source-line-no">203</span><span id="line-203"> * @param args main args</span> |
| <span class="source-line-no">204</span><span id="line-204"> */</span> |
| <span class="source-line-no">205</span><span id="line-205"> public static void main(String[] args) {</span> |
| <span class="source-line-no">206</span><span id="line-206"> RuntimeMXBean runtime = ManagementFactory.getRuntimeMXBean();</span> |
| <span class="source-line-no">207</span><span id="line-207"> LOG.info("vmName=" + runtime.getVmName() + ", vmVendor=" + runtime.getVmVendor()</span> |
| <span class="source-line-no">208</span><span id="line-208"> + ", vmVersion=" + runtime.getVmVersion());</span> |
| <span class="source-line-no">209</span><span id="line-209"> LOG.info("vmInputArguments=" + runtime.getInputArguments());</span> |
| <span class="source-line-no">210</span><span id="line-210"> DefaultMemStore memstore1 = new DefaultMemStore();</span> |
| <span class="source-line-no">211</span><span id="line-211"> // TODO: x32 vs x64</span> |
| <span class="source-line-no">212</span><span id="line-212"> final int count = 10000;</span> |
| <span class="source-line-no">213</span><span id="line-213"> byte[] fam = Bytes.toBytes("col");</span> |
| <span class="source-line-no">214</span><span id="line-214"> byte[] qf = Bytes.toBytes("umn");</span> |
| <span class="source-line-no">215</span><span id="line-215"> byte[] empty = new byte[0];</span> |
| <span class="source-line-no">216</span><span id="line-216"> MemStoreSizing memStoreSizing = new NonThreadSafeMemStoreSizing();</span> |
| <span class="source-line-no">217</span><span id="line-217"> for (int i = 0; i < count; i++) {</span> |
| <span class="source-line-no">218</span><span id="line-218"> // Give each its own ts</span> |
| <span class="source-line-no">219</span><span id="line-219"> memstore1.add(new KeyValue(Bytes.toBytes(i), fam, qf, i, empty), memStoreSizing);</span> |
| <span class="source-line-no">220</span><span id="line-220"> }</span> |
| <span class="source-line-no">221</span><span id="line-221"> LOG.info("memstore1 estimated size={}", memStoreSizing.getMemStoreSize().getDataSize()</span> |
| <span class="source-line-no">222</span><span id="line-222"> + memStoreSizing.getMemStoreSize().getHeapSize());</span> |
| <span class="source-line-no">223</span><span id="line-223"> for (int i = 0; i < count; i++) {</span> |
| <span class="source-line-no">224</span><span id="line-224"> memstore1.add(new KeyValue(Bytes.toBytes(i), fam, qf, i, empty), memStoreSizing);</span> |
| <span class="source-line-no">225</span><span id="line-225"> }</span> |
| <span class="source-line-no">226</span><span id="line-226"> LOG.info("memstore1 estimated size (2nd loading of same data)={}",</span> |
| <span class="source-line-no">227</span><span id="line-227"> memStoreSizing.getMemStoreSize().getDataSize()</span> |
| <span class="source-line-no">228</span><span id="line-228"> + memStoreSizing.getMemStoreSize().getHeapSize());</span> |
| <span class="source-line-no">229</span><span id="line-229"> // Make a variably sized memstore.</span> |
| <span class="source-line-no">230</span><span id="line-230"> DefaultMemStore memstore2 = new DefaultMemStore();</span> |
| <span class="source-line-no">231</span><span id="line-231"> memStoreSizing = new NonThreadSafeMemStoreSizing();</span> |
| <span class="source-line-no">232</span><span id="line-232"> for (int i = 0; i < count; i++) {</span> |
| <span class="source-line-no">233</span><span id="line-233"> memstore2.add(new KeyValue(Bytes.toBytes(i), fam, qf, i, new byte[i]), memStoreSizing);</span> |
| <span class="source-line-no">234</span><span id="line-234"> }</span> |
| <span class="source-line-no">235</span><span id="line-235"> LOG.info("memstore2 estimated size={}", memStoreSizing.getMemStoreSize().getDataSize()</span> |
| <span class="source-line-no">236</span><span id="line-236"> + memStoreSizing.getMemStoreSize().getHeapSize());</span> |
| <span class="source-line-no">237</span><span id="line-237"> final int seconds = 30;</span> |
| <span class="source-line-no">238</span><span id="line-238"> LOG.info("Waiting " + seconds + " seconds while heap dump is taken");</span> |
| <span class="source-line-no">239</span><span id="line-239"> LOG.info("Exiting.");</span> |
| <span class="source-line-no">240</span><span id="line-240"> }</span> |
| <span class="source-line-no">241</span><span id="line-241">}</span> |
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| </pre> |
| </div> |
| </main> |
| </body> |
| </html> |
