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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;</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.util.ArrayList;</span> |
| <span class="source-line-no">021</span><span id="line-21">import java.util.Comparator;</span> |
| <span class="source-line-no">022</span><span id="line-22">import java.util.List;</span> |
| <span class="source-line-no">023</span><span id="line-23">import java.util.Map;</span> |
| <span class="source-line-no">024</span><span id="line-24">import java.util.NavigableSet;</span> |
| <span class="source-line-no">025</span><span id="line-25">import java.util.TreeMap;</span> |
| <span class="source-line-no">026</span><span id="line-26">import java.util.TreeSet;</span> |
| <span class="source-line-no">027</span><span id="line-27">import org.apache.hadoop.fs.StorageType;</span> |
| <span class="source-line-no">028</span><span id="line-28">import org.apache.hadoop.hbase.util.DNS;</span> |
| <span class="source-line-no">029</span><span id="line-29">import org.apache.yetus.audience.InterfaceAudience;</span> |
| <span class="source-line-no">030</span><span id="line-30"></span> |
| <span class="source-line-no">031</span><span id="line-31">/**</span> |
| <span class="source-line-no">032</span><span id="line-32"> * Data structure to describe the distribution of HDFS blocks among hosts. Adding erroneous data</span> |
| <span class="source-line-no">033</span><span id="line-33"> * will be ignored silently.</span> |
| <span class="source-line-no">034</span><span id="line-34"> */</span> |
| <span class="source-line-no">035</span><span id="line-35">@InterfaceAudience.Private</span> |
| <span class="source-line-no">036</span><span id="line-36">public class HDFSBlocksDistribution {</span> |
| <span class="source-line-no">037</span><span id="line-37"> private Map<String, HostAndWeight> hostAndWeights = null;</span> |
| <span class="source-line-no">038</span><span id="line-38"> private long uniqueBlocksTotalWeight = 0;</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"> * Stores the hostname and weight for that hostname. This is used when determining the physical</span> |
| <span class="source-line-no">042</span><span id="line-42"> * locations of the blocks making up a region. To make a prioritized list of the hosts holding the</span> |
| <span class="source-line-no">043</span><span id="line-43"> * most data of a region, this class is used to count the total weight for each host. The weight</span> |
| <span class="source-line-no">044</span><span id="line-44"> * is currently just the size of the file.</span> |
| <span class="source-line-no">045</span><span id="line-45"> */</span> |
| <span class="source-line-no">046</span><span id="line-46"> public static class HostAndWeight {</span> |
| <span class="source-line-no">047</span><span id="line-47"></span> |
| <span class="source-line-no">048</span><span id="line-48"> private final String host;</span> |
| <span class="source-line-no">049</span><span id="line-49"> private long weight;</span> |
| <span class="source-line-no">050</span><span id="line-50"> private long weightForSsd;</span> |
| <span class="source-line-no">051</span><span id="line-51"></span> |
| <span class="source-line-no">052</span><span id="line-52"> /**</span> |
| <span class="source-line-no">053</span><span id="line-53"> * Constructor</span> |
| <span class="source-line-no">054</span><span id="line-54"> * @param host the host name</span> |
| <span class="source-line-no">055</span><span id="line-55"> * @param weight the weight</span> |
| <span class="source-line-no">056</span><span id="line-56"> * @param weightForSsd the weight for ssd</span> |
| <span class="source-line-no">057</span><span id="line-57"> */</span> |
| <span class="source-line-no">058</span><span id="line-58"> public HostAndWeight(String host, long weight, long weightForSsd) {</span> |
| <span class="source-line-no">059</span><span id="line-59"> this.host = host;</span> |
| <span class="source-line-no">060</span><span id="line-60"> this.weight = weight;</span> |
| <span class="source-line-no">061</span><span id="line-61"> this.weightForSsd = weightForSsd;</span> |
| <span class="source-line-no">062</span><span id="line-62"> }</span> |
| <span class="source-line-no">063</span><span id="line-63"></span> |
| <span class="source-line-no">064</span><span id="line-64"> /**</span> |
| <span class="source-line-no">065</span><span id="line-65"> * add weight</span> |
| <span class="source-line-no">066</span><span id="line-66"> * @param weight the weight</span> |
| <span class="source-line-no">067</span><span id="line-67"> * @param weightForSsd the weight for ssd</span> |
| <span class="source-line-no">068</span><span id="line-68"> */</span> |
| <span class="source-line-no">069</span><span id="line-69"> public void addWeight(long weight, long weightForSsd) {</span> |
| <span class="source-line-no">070</span><span id="line-70"> this.weight += weight;</span> |
| <span class="source-line-no">071</span><span id="line-71"> this.weightForSsd += weightForSsd;</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"> /** Returns the host name */</span> |
| <span class="source-line-no">075</span><span id="line-75"> public String getHost() {</span> |
| <span class="source-line-no">076</span><span id="line-76"> return host;</span> |
| <span class="source-line-no">077</span><span id="line-77"> }</span> |
| <span class="source-line-no">078</span><span id="line-78"></span> |
| <span class="source-line-no">079</span><span id="line-79"> /** Returns the weight */</span> |
| <span class="source-line-no">080</span><span id="line-80"> public long getWeight() {</span> |
| <span class="source-line-no">081</span><span id="line-81"> return weight;</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"> /** Returns the weight for ssd */</span> |
| <span class="source-line-no">085</span><span id="line-85"> public long getWeightForSsd() {</span> |
| <span class="source-line-no">086</span><span id="line-86"> return weightForSsd;</span> |
| <span class="source-line-no">087</span><span id="line-87"> }</span> |
| <span class="source-line-no">088</span><span id="line-88"></span> |
| <span class="source-line-no">089</span><span id="line-89"> /** Comparator used to sort hosts based on weight */</span> |
| <span class="source-line-no">090</span><span id="line-90"> public static class WeightComparator implements Comparator<HostAndWeight> {</span> |
| <span class="source-line-no">091</span><span id="line-91"> @Override</span> |
| <span class="source-line-no">092</span><span id="line-92"> public int compare(HostAndWeight l, HostAndWeight r) {</span> |
| <span class="source-line-no">093</span><span id="line-93"> if (l.getWeight() == r.getWeight()) {</span> |
| <span class="source-line-no">094</span><span id="line-94"> return l.getHost().compareTo(r.getHost());</span> |
| <span class="source-line-no">095</span><span id="line-95"> }</span> |
| <span class="source-line-no">096</span><span id="line-96"> return l.getWeight() < r.getWeight() ? -1 : 1;</span> |
| <span class="source-line-no">097</span><span id="line-97"> }</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"></span> |
| <span class="source-line-no">101</span><span id="line-101"> public HDFSBlocksDistribution() {</span> |
| <span class="source-line-no">102</span><span id="line-102"> this.hostAndWeights = new TreeMap<>();</span> |
| <span class="source-line-no">103</span><span id="line-103"> }</span> |
| <span class="source-line-no">104</span><span id="line-104"></span> |
| <span class="source-line-no">105</span><span id="line-105"> @Override</span> |
| <span class="source-line-no">106</span><span id="line-106"> public synchronized String toString() {</span> |
| <span class="source-line-no">107</span><span id="line-107"> return "number of unique hosts in the distribution=" + this.hostAndWeights.size();</span> |
| <span class="source-line-no">108</span><span id="line-108"> }</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"> * add some weight to a list of hosts, update the value of unique block weight</span> |
| <span class="source-line-no">112</span><span id="line-112"> * @param hosts the list of the host</span> |
| <span class="source-line-no">113</span><span id="line-113"> * @param weight the weight</span> |
| <span class="source-line-no">114</span><span id="line-114"> */</span> |
| <span class="source-line-no">115</span><span id="line-115"> public void addHostsAndBlockWeight(String[] hosts, long weight) {</span> |
| <span class="source-line-no">116</span><span id="line-116"> addHostsAndBlockWeight(hosts, weight, null);</span> |
| <span class="source-line-no">117</span><span id="line-117"> }</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"> * add some weight to a list of hosts, update the value of unique block weight</span> |
| <span class="source-line-no">121</span><span id="line-121"> * @param hosts the list of the host</span> |
| <span class="source-line-no">122</span><span id="line-122"> * @param weight the weight</span> |
| <span class="source-line-no">123</span><span id="line-123"> */</span> |
| <span class="source-line-no">124</span><span id="line-124"> public void addHostsAndBlockWeight(String[] hosts, long weight, StorageType[] storageTypes) {</span> |
| <span class="source-line-no">125</span><span id="line-125"> if (hosts == null || hosts.length == 0) {</span> |
| <span class="source-line-no">126</span><span id="line-126"> // erroneous data</span> |
| <span class="source-line-no">127</span><span id="line-127"> return;</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"> addUniqueWeight(weight);</span> |
| <span class="source-line-no">131</span><span id="line-131"> if (storageTypes != null && storageTypes.length == hosts.length) {</span> |
| <span class="source-line-no">132</span><span id="line-132"> for (int i = 0; i < hosts.length; i++) {</span> |
| <span class="source-line-no">133</span><span id="line-133"> long weightForSsd = 0;</span> |
| <span class="source-line-no">134</span><span id="line-134"> if (storageTypes[i] == StorageType.SSD) {</span> |
| <span class="source-line-no">135</span><span id="line-135"> weightForSsd = weight;</span> |
| <span class="source-line-no">136</span><span id="line-136"> }</span> |
| <span class="source-line-no">137</span><span id="line-137"> addHostAndBlockWeight(hosts[i], weight, weightForSsd);</span> |
| <span class="source-line-no">138</span><span id="line-138"> }</span> |
| <span class="source-line-no">139</span><span id="line-139"> } else {</span> |
| <span class="source-line-no">140</span><span id="line-140"> for (String hostname : hosts) {</span> |
| <span class="source-line-no">141</span><span id="line-141"> addHostAndBlockWeight(hostname, weight, 0);</span> |
| <span class="source-line-no">142</span><span id="line-142"> }</span> |
| <span class="source-line-no">143</span><span id="line-143"> }</span> |
| <span class="source-line-no">144</span><span id="line-144"> }</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"> * add some weight to the total unique weight</span> |
| <span class="source-line-no">148</span><span id="line-148"> * @param weight the weight</span> |
| <span class="source-line-no">149</span><span id="line-149"> */</span> |
| <span class="source-line-no">150</span><span id="line-150"> private void addUniqueWeight(long weight) {</span> |
| <span class="source-line-no">151</span><span id="line-151"> uniqueBlocksTotalWeight += weight;</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"> * add some weight to a specific host</span> |
| <span class="source-line-no">156</span><span id="line-156"> * @param host the host name</span> |
| <span class="source-line-no">157</span><span id="line-157"> * @param weight the weight</span> |
| <span class="source-line-no">158</span><span id="line-158"> * @param weightForSsd the weight for ssd</span> |
| <span class="source-line-no">159</span><span id="line-159"> */</span> |
| <span class="source-line-no">160</span><span id="line-160"> private void addHostAndBlockWeight(String host, long weight, long weightForSsd) {</span> |
| <span class="source-line-no">161</span><span id="line-161"> if (host == null) {</span> |
| <span class="source-line-no">162</span><span id="line-162"> // erroneous data</span> |
| <span class="source-line-no">163</span><span id="line-163"> return;</span> |
| <span class="source-line-no">164</span><span id="line-164"> }</span> |
| <span class="source-line-no">165</span><span id="line-165"></span> |
| <span class="source-line-no">166</span><span id="line-166"> HostAndWeight hostAndWeight = this.hostAndWeights.get(host);</span> |
| <span class="source-line-no">167</span><span id="line-167"> if (hostAndWeight == null) {</span> |
| <span class="source-line-no">168</span><span id="line-168"> hostAndWeight = new HostAndWeight(host, weight, weightForSsd);</span> |
| <span class="source-line-no">169</span><span id="line-169"> this.hostAndWeights.put(host, hostAndWeight);</span> |
| <span class="source-line-no">170</span><span id="line-170"> } else {</span> |
| <span class="source-line-no">171</span><span id="line-171"> hostAndWeight.addWeight(weight, weightForSsd);</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"></span> |
| <span class="source-line-no">175</span><span id="line-175"> /** Returns the hosts and their weights */</span> |
| <span class="source-line-no">176</span><span id="line-176"> public Map<String, HostAndWeight> getHostAndWeights() {</span> |
| <span class="source-line-no">177</span><span id="line-177"> return this.hostAndWeights;</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"> * return the weight for a specific host, that will be the total bytes of all blocks on the host</span> |
| <span class="source-line-no">182</span><span id="line-182"> * @param host the host name</span> |
| <span class="source-line-no">183</span><span id="line-183"> * @return the weight of the given host</span> |
| <span class="source-line-no">184</span><span id="line-184"> */</span> |
| <span class="source-line-no">185</span><span id="line-185"> public long getWeight(String host) {</span> |
| <span class="source-line-no">186</span><span id="line-186"> long weight = 0;</span> |
| <span class="source-line-no">187</span><span id="line-187"> if (host != null) {</span> |
| <span class="source-line-no">188</span><span id="line-188"> HostAndWeight hostAndWeight = this.hostAndWeights.get(host);</span> |
| <span class="source-line-no">189</span><span id="line-189"> if (hostAndWeight != null) {</span> |
| <span class="source-line-no">190</span><span id="line-190"> weight = hostAndWeight.getWeight();</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"> return weight;</span> |
| <span class="source-line-no">194</span><span id="line-194"> }</span> |
| <span class="source-line-no">195</span><span id="line-195"></span> |
| <span class="source-line-no">196</span><span id="line-196"> /** Returns the sum of all unique blocks' weight */</span> |
| <span class="source-line-no">197</span><span id="line-197"> public long getUniqueBlocksTotalWeight() {</span> |
| <span class="source-line-no">198</span><span id="line-198"> return uniqueBlocksTotalWeight;</span> |
| <span class="source-line-no">199</span><span id="line-199"> }</span> |
| <span class="source-line-no">200</span><span id="line-200"></span> |
| <span class="source-line-no">201</span><span id="line-201"> /** Implementations 'visit' hostAndWeight. */</span> |
| <span class="source-line-no">202</span><span id="line-202"> public interface Visitor {</span> |
| <span class="source-line-no">203</span><span id="line-203"> long visit(final HostAndWeight hostAndWeight);</span> |
| <span class="source-line-no">204</span><span id="line-204"> }</span> |
| <span class="source-line-no">205</span><span id="line-205"></span> |
| <span class="source-line-no">206</span><span id="line-206"> /**</span> |
| <span class="source-line-no">207</span><span id="line-207"> * Get the block locality index for a given host</span> |
| <span class="source-line-no">208</span><span id="line-208"> * @param host the host name</span> |
| <span class="source-line-no">209</span><span id="line-209"> * @return the locality index of the given host</span> |
| <span class="source-line-no">210</span><span id="line-210"> */</span> |
| <span class="source-line-no">211</span><span id="line-211"> public float getBlockLocalityIndex(String host) {</span> |
| <span class="source-line-no">212</span><span id="line-212"> if (uniqueBlocksTotalWeight == 0) {</span> |
| <span class="source-line-no">213</span><span id="line-213"> return 0.0f;</span> |
| <span class="source-line-no">214</span><span id="line-214"> } else {</span> |
| <span class="source-line-no">215</span><span id="line-215"> return (float) getBlocksLocalityWeightInternal(host, HostAndWeight::getWeight)</span> |
| <span class="source-line-no">216</span><span id="line-216"> / (float) uniqueBlocksTotalWeight;</span> |
| <span class="source-line-no">217</span><span id="line-217"> }</span> |
| <span class="source-line-no">218</span><span id="line-218"> }</span> |
| <span class="source-line-no">219</span><span id="line-219"></span> |
| <span class="source-line-no">220</span><span id="line-220"> /**</span> |
| <span class="source-line-no">221</span><span id="line-221"> * Get the block locality index for a ssd for a given host</span> |
| <span class="source-line-no">222</span><span id="line-222"> * @param host the host name</span> |
| <span class="source-line-no">223</span><span id="line-223"> * @return the locality index with ssd of the given host</span> |
| <span class="source-line-no">224</span><span id="line-224"> */</span> |
| <span class="source-line-no">225</span><span id="line-225"> public float getBlockLocalityIndexForSsd(String host) {</span> |
| <span class="source-line-no">226</span><span id="line-226"> if (uniqueBlocksTotalWeight == 0) {</span> |
| <span class="source-line-no">227</span><span id="line-227"> return 0.0f;</span> |
| <span class="source-line-no">228</span><span id="line-228"> } else {</span> |
| <span class="source-line-no">229</span><span id="line-229"> return (float) getBlocksLocalityWeightInternal(host, HostAndWeight::getWeightForSsd)</span> |
| <span class="source-line-no">230</span><span id="line-230"> / (float) uniqueBlocksTotalWeight;</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"></span> |
| <span class="source-line-no">234</span><span id="line-234"> /**</span> |
| <span class="source-line-no">235</span><span id="line-235"> * Get the blocks local weight for a given host</span> |
| <span class="source-line-no">236</span><span id="line-236"> * @param host the host name</span> |
| <span class="source-line-no">237</span><span id="line-237"> * @return the blocks local weight of the given host</span> |
| <span class="source-line-no">238</span><span id="line-238"> */</span> |
| <span class="source-line-no">239</span><span id="line-239"> public long getBlocksLocalWeight(String host) {</span> |
| <span class="source-line-no">240</span><span id="line-240"> return getBlocksLocalityWeightInternal(host, HostAndWeight::getWeight);</span> |
| <span class="source-line-no">241</span><span id="line-241"> }</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"> * Get the blocks local weight with ssd for a given host</span> |
| <span class="source-line-no">245</span><span id="line-245"> * @param host the host name</span> |
| <span class="source-line-no">246</span><span id="line-246"> * @return the blocks local with ssd weight of the given host</span> |
| <span class="source-line-no">247</span><span id="line-247"> */</span> |
| <span class="source-line-no">248</span><span id="line-248"> public long getBlocksLocalWithSsdWeight(String host) {</span> |
| <span class="source-line-no">249</span><span id="line-249"> return getBlocksLocalityWeightInternal(host, HostAndWeight::getWeightForSsd);</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"> private long getBlocksLocalityWeightInternal(String host, Visitor visitor) {</span> |
| <span class="source-line-no">253</span><span id="line-253"> long localityIndex = 0;</span> |
| <span class="source-line-no">254</span><span id="line-254"> HostAndWeight hostAndWeight = this.hostAndWeights.get(host);</span> |
| <span class="source-line-no">255</span><span id="line-255"> // Compatible with local mode, see HBASE-24569</span> |
| <span class="source-line-no">256</span><span id="line-256"> if (hostAndWeight == null) {</span> |
| <span class="source-line-no">257</span><span id="line-257"> String currentHost = "";</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"> currentHost = DNS.getDefaultHost("default", "default");</span> |
| <span class="source-line-no">260</span><span id="line-260"> } catch (Exception e) {</span> |
| <span class="source-line-no">261</span><span id="line-261"> // Just ignore, it's ok, avoid too many log info</span> |
| <span class="source-line-no">262</span><span id="line-262"> }</span> |
| <span class="source-line-no">263</span><span id="line-263"> if (host.equals(currentHost)) {</span> |
| <span class="source-line-no">264</span><span id="line-264"> hostAndWeight = this.hostAndWeights.get(HConstants.LOCALHOST);</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"> if (hostAndWeight != null && uniqueBlocksTotalWeight != 0) {</span> |
| <span class="source-line-no">268</span><span id="line-268"> localityIndex = visitor.visit(hostAndWeight);</span> |
| <span class="source-line-no">269</span><span id="line-269"> }</span> |
| <span class="source-line-no">270</span><span id="line-270"> return localityIndex;</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"> * This will add the distribution from input to this object</span> |
| <span class="source-line-no">275</span><span id="line-275"> * @param otherBlocksDistribution the other hdfs blocks distribution</span> |
| <span class="source-line-no">276</span><span id="line-276"> */</span> |
| <span class="source-line-no">277</span><span id="line-277"> public void add(HDFSBlocksDistribution otherBlocksDistribution) {</span> |
| <span class="source-line-no">278</span><span id="line-278"> Map<String, HostAndWeight> otherHostAndWeights = otherBlocksDistribution.getHostAndWeights();</span> |
| <span class="source-line-no">279</span><span id="line-279"> for (Map.Entry<String, HostAndWeight> otherHostAndWeight : otherHostAndWeights.entrySet()) {</span> |
| <span class="source-line-no">280</span><span id="line-280"> addHostAndBlockWeight(otherHostAndWeight.getValue().host,</span> |
| <span class="source-line-no">281</span><span id="line-281"> otherHostAndWeight.getValue().weight, otherHostAndWeight.getValue().weightForSsd);</span> |
| <span class="source-line-no">282</span><span id="line-282"> }</span> |
| <span class="source-line-no">283</span><span id="line-283"> addUniqueWeight(otherBlocksDistribution.getUniqueBlocksTotalWeight());</span> |
| <span class="source-line-no">284</span><span id="line-284"> }</span> |
| <span class="source-line-no">285</span><span id="line-285"></span> |
| <span class="source-line-no">286</span><span id="line-286"> /** Return the sorted list of hosts in terms of their weights */</span> |
| <span class="source-line-no">287</span><span id="line-287"> public List<String> getTopHosts() {</span> |
| <span class="source-line-no">288</span><span id="line-288"> HostAndWeight[] hostAndWeights = getTopHostsWithWeights();</span> |
| <span class="source-line-no">289</span><span id="line-289"> List<String> topHosts = new ArrayList<>(hostAndWeights.length);</span> |
| <span class="source-line-no">290</span><span id="line-290"> for (HostAndWeight haw : hostAndWeights) {</span> |
| <span class="source-line-no">291</span><span id="line-291"> topHosts.add(haw.getHost());</span> |
| <span class="source-line-no">292</span><span id="line-292"> }</span> |
| <span class="source-line-no">293</span><span id="line-293"> return topHosts;</span> |
| <span class="source-line-no">294</span><span id="line-294"> }</span> |
| <span class="source-line-no">295</span><span id="line-295"></span> |
| <span class="source-line-no">296</span><span id="line-296"> /** Return the sorted list of hosts in terms of their weights */</span> |
| <span class="source-line-no">297</span><span id="line-297"> public HostAndWeight[] getTopHostsWithWeights() {</span> |
| <span class="source-line-no">298</span><span id="line-298"> NavigableSet<HostAndWeight> orderedHosts = new TreeSet<>(new HostAndWeight.WeightComparator());</span> |
| <span class="source-line-no">299</span><span id="line-299"> orderedHosts.addAll(this.hostAndWeights.values());</span> |
| <span class="source-line-no">300</span><span id="line-300"> return orderedHosts.descendingSet().toArray(new HostAndWeight[orderedHosts.size()]);</span> |
| <span class="source-line-no">301</span><span id="line-301"> }</span> |
| <span class="source-line-no">302</span><span id="line-302"></span> |
| <span class="source-line-no">303</span><span id="line-303">}</span> |
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| </pre> |
| </div> |
| </main> |
| </body> |
| </html> |
