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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.util.List;</span> |
| <span class="source-line-no">022</span><span id="line-22">import org.apache.hadoop.conf.Configuration;</span> |
| <span class="source-line-no">023</span><span id="line-23">import org.apache.hadoop.hbase.HConstants;</span> |
| <span class="source-line-no">024</span><span id="line-24">import org.apache.hadoop.hbase.TableName;</span> |
| <span class="source-line-no">025</span><span id="line-25">import org.apache.hadoop.hbase.client.RegionInfo;</span> |
| <span class="source-line-no">026</span><span id="line-26">import org.apache.hadoop.hbase.client.TableDescriptor;</span> |
| <span class="source-line-no">027</span><span id="line-27">import org.apache.hadoop.hbase.client.TableDescriptorBuilder;</span> |
| <span class="source-line-no">028</span><span id="line-28">import org.apache.yetus.audience.InterfaceAudience;</span> |
| <span class="source-line-no">029</span><span id="line-29">import org.slf4j.Logger;</span> |
| <span class="source-line-no">030</span><span id="line-30">import org.slf4j.LoggerFactory;</span> |
| <span class="source-line-no">031</span><span id="line-31"></span> |
| <span class="source-line-no">032</span><span id="line-32">/**</span> |
| <span class="source-line-no">033</span><span id="line-33"> * Split size is the number of regions that are on this server that all are of the same table,</span> |
| <span class="source-line-no">034</span><span id="line-34"> * cubed, times 2x the region flush size OR the maximum region split size, whichever is smaller.</span> |
| <span class="source-line-no">035</span><span id="line-35"> * <p></span> |
| <span class="source-line-no">036</span><span id="line-36"> * For example, if the flush size is 128MB, then after two flushes (256MB) we will split which will</span> |
| <span class="source-line-no">037</span><span id="line-37"> * make two regions that will split when their size is {@code 2^3 * 128MB*2 = 2048MB}.</span> |
| <span class="source-line-no">038</span><span id="line-38"> * <p></span> |
| <span class="source-line-no">039</span><span id="line-39"> * If one of these regions splits, then there are three regions and now the split size is</span> |
| <span class="source-line-no">040</span><span id="line-40"> * {@code 3^3 * 128MB*2 = 6912MB}, and so on until we reach the configured maximum file size and</span> |
| <span class="source-line-no">041</span><span id="line-41"> * then from there on out, we'll use that.</span> |
| <span class="source-line-no">042</span><span id="line-42"> */</span> |
| <span class="source-line-no">043</span><span id="line-43">@InterfaceAudience.Private</span> |
| <span class="source-line-no">044</span><span id="line-44">public class IncreasingToUpperBoundRegionSplitPolicy extends ConstantSizeRegionSplitPolicy {</span> |
| <span class="source-line-no">045</span><span id="line-45"> private static final Logger LOG =</span> |
| <span class="source-line-no">046</span><span id="line-46"> LoggerFactory.getLogger(IncreasingToUpperBoundRegionSplitPolicy.class);</span> |
| <span class="source-line-no">047</span><span id="line-47"></span> |
| <span class="source-line-no">048</span><span id="line-48"> protected long initialSize;</span> |
| <span class="source-line-no">049</span><span id="line-49"></span> |
| <span class="source-line-no">050</span><span id="line-50"> @Override</span> |
| <span class="source-line-no">051</span><span id="line-51"> public String toString() {</span> |
| <span class="source-line-no">052</span><span id="line-52"> return "IncreasingToUpperBoundRegionSplitPolicy{" + "initialSize=" + initialSize + ", "</span> |
| <span class="source-line-no">053</span><span id="line-53"> + super.toString() + '}';</span> |
| <span class="source-line-no">054</span><span id="line-54"> }</span> |
| <span class="source-line-no">055</span><span id="line-55"></span> |
| <span class="source-line-no">056</span><span id="line-56"> @Override</span> |
| <span class="source-line-no">057</span><span id="line-57"> protected void configureForRegion(HRegion region) {</span> |
| <span class="source-line-no">058</span><span id="line-58"> super.configureForRegion(region);</span> |
| <span class="source-line-no">059</span><span id="line-59"> Configuration conf = getConf();</span> |
| <span class="source-line-no">060</span><span id="line-60"> initialSize = conf.getLong("hbase.increasing.policy.initial.size", -1);</span> |
| <span class="source-line-no">061</span><span id="line-61"> if (initialSize > 0) {</span> |
| <span class="source-line-no">062</span><span id="line-62"> return;</span> |
| <span class="source-line-no">063</span><span id="line-63"> }</span> |
| <span class="source-line-no">064</span><span id="line-64"> TableDescriptor desc = region.getTableDescriptor();</span> |
| <span class="source-line-no">065</span><span id="line-65"> if (desc != null) {</span> |
| <span class="source-line-no">066</span><span id="line-66"> initialSize = 2 * desc.getMemStoreFlushSize();</span> |
| <span class="source-line-no">067</span><span id="line-67"> }</span> |
| <span class="source-line-no">068</span><span id="line-68"> if (initialSize <= 0) {</span> |
| <span class="source-line-no">069</span><span id="line-69"> initialSize = 2 * conf.getLong(HConstants.HREGION_MEMSTORE_FLUSH_SIZE,</span> |
| <span class="source-line-no">070</span><span id="line-70"> TableDescriptorBuilder.DEFAULT_MEMSTORE_FLUSH_SIZE);</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"></span> |
| <span class="source-line-no">074</span><span id="line-74"> @Override</span> |
| <span class="source-line-no">075</span><span id="line-75"> protected boolean shouldSplit() {</span> |
| <span class="source-line-no">076</span><span id="line-76"> if (!canSplit()) {</span> |
| <span class="source-line-no">077</span><span id="line-77"> return false;</span> |
| <span class="source-line-no">078</span><span id="line-78"> }</span> |
| <span class="source-line-no">079</span><span id="line-79"> // Get count of regions that have the same common table as this.region</span> |
| <span class="source-line-no">080</span><span id="line-80"> int tableRegionsCount = getCountOfCommonTableRegions();</span> |
| <span class="source-line-no">081</span><span id="line-81"> // Get size to check</span> |
| <span class="source-line-no">082</span><span id="line-82"> long sizeToCheck = getSizeToCheck(tableRegionsCount);</span> |
| <span class="source-line-no">083</span><span id="line-83"> boolean shouldSplit = isExceedSize(sizeToCheck);</span> |
| <span class="source-line-no">084</span><span id="line-84"> if (shouldSplit) {</span> |
| <span class="source-line-no">085</span><span id="line-85"> LOG.debug("regionsWithCommonTable={}", tableRegionsCount);</span> |
| <span class="source-line-no">086</span><span id="line-86"> }</span> |
| <span class="source-line-no">087</span><span id="line-87"> return shouldSplit;</span> |
| <span class="source-line-no">088</span><span id="line-88"> }</span> |
| <span class="source-line-no">089</span><span id="line-89"></span> |
| <span class="source-line-no">090</span><span id="line-90"> /** Returns Count of regions on this server that share the table this.region belongs to */</span> |
| <span class="source-line-no">091</span><span id="line-91"> private int getCountOfCommonTableRegions() {</span> |
| <span class="source-line-no">092</span><span id="line-92"> RegionServerServices rss = region.getRegionServerServices();</span> |
| <span class="source-line-no">093</span><span id="line-93"> // Can be null in tests</span> |
| <span class="source-line-no">094</span><span id="line-94"> if (rss == null) {</span> |
| <span class="source-line-no">095</span><span id="line-95"> return 0;</span> |
| <span class="source-line-no">096</span><span id="line-96"> }</span> |
| <span class="source-line-no">097</span><span id="line-97"> TableName tablename = region.getTableDescriptor().getTableName();</span> |
| <span class="source-line-no">098</span><span id="line-98"> int tableRegionsCount = 0;</span> |
| <span class="source-line-no">099</span><span id="line-99"> try {</span> |
| <span class="source-line-no">100</span><span id="line-100"> List<? extends Region> hri = rss.getRegions(tablename);</span> |
| <span class="source-line-no">101</span><span id="line-101"> if (hri != null && !hri.isEmpty()) {</span> |
| <span class="source-line-no">102</span><span id="line-102"> tableRegionsCount = (int) hri.stream()</span> |
| <span class="source-line-no">103</span><span id="line-103"> .filter(r -> r.getRegionInfo().getReplicaId() == RegionInfo.DEFAULT_REPLICA_ID).count();</span> |
| <span class="source-line-no">104</span><span id="line-104"> }</span> |
| <span class="source-line-no">105</span><span id="line-105"> } catch (IOException e) {</span> |
| <span class="source-line-no">106</span><span id="line-106"> LOG.debug("Failed getOnlineRegions " + tablename, e);</span> |
| <span class="source-line-no">107</span><span id="line-107"> }</span> |
| <span class="source-line-no">108</span><span id="line-108"> return tableRegionsCount;</span> |
| <span class="source-line-no">109</span><span id="line-109"> }</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 Region max size or {@code count of regions cubed * 2 * flushsize}, which ever is</span> |
| <span class="source-line-no">113</span><span id="line-113"> * smaller; guard against there being zero regions on this server.</span> |
| <span class="source-line-no">114</span><span id="line-114"> */</span> |
| <span class="source-line-no">115</span><span id="line-115"> protected long getSizeToCheck(final int tableRegionsCount) {</span> |
| <span class="source-line-no">116</span><span id="line-116"> // safety check for 100 to avoid numerical overflow in extreme cases</span> |
| <span class="source-line-no">117</span><span id="line-117"> return tableRegionsCount == 0 || tableRegionsCount > 100</span> |
| <span class="source-line-no">118</span><span id="line-118"> ? getDesiredMaxFileSize()</span> |
| <span class="source-line-no">119</span><span id="line-119"> : Math.min(getDesiredMaxFileSize(),</span> |
| <span class="source-line-no">120</span><span id="line-120"> initialSize * tableRegionsCount * tableRegionsCount * tableRegionsCount);</span> |
| <span class="source-line-no">121</span><span id="line-121"> }</span> |
| <span class="source-line-no">122</span><span id="line-122"></span> |
| <span class="source-line-no">123</span><span id="line-123">}</span> |
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| </pre> |
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