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| <pre><span class="sourceLineNo">001</span>/**<a name="line.1"></a> |
| <span class="sourceLineNo">002</span> *<a name="line.2"></a> |
| <span class="sourceLineNo">003</span> * Licensed to the Apache Software Foundation (ASF) under one<a name="line.3"></a> |
| <span class="sourceLineNo">004</span> * or more contributor license agreements. See the NOTICE file<a name="line.4"></a> |
| <span class="sourceLineNo">005</span> * distributed with this work for additional information<a name="line.5"></a> |
| <span class="sourceLineNo">006</span> * regarding copyright ownership. The ASF licenses this file<a name="line.6"></a> |
| <span class="sourceLineNo">007</span> * to you under the Apache License, Version 2.0 (the<a name="line.7"></a> |
| <span class="sourceLineNo">008</span> * "License"); you may not use this file except in compliance<a name="line.8"></a> |
| <span class="sourceLineNo">009</span> * with the License. You may obtain a copy of the License at<a name="line.9"></a> |
| <span class="sourceLineNo">010</span> *<a name="line.10"></a> |
| <span class="sourceLineNo">011</span> * http://www.apache.org/licenses/LICENSE-2.0<a name="line.11"></a> |
| <span class="sourceLineNo">012</span> *<a name="line.12"></a> |
| <span class="sourceLineNo">013</span> * Unless required by applicable law or agreed to in writing, software<a name="line.13"></a> |
| <span class="sourceLineNo">014</span> * distributed under the License is distributed on an "AS IS" BASIS,<a name="line.14"></a> |
| <span class="sourceLineNo">015</span> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<a name="line.15"></a> |
| <span class="sourceLineNo">016</span> * See the License for the specific language governing permissions and<a name="line.16"></a> |
| <span class="sourceLineNo">017</span> * limitations under the License.<a name="line.17"></a> |
| <span class="sourceLineNo">018</span> */<a name="line.18"></a> |
| <span class="sourceLineNo">019</span>package org.apache.hadoop.hbase;<a name="line.19"></a> |
| <span class="sourceLineNo">020</span><a name="line.20"></a> |
| <span class="sourceLineNo">021</span>import java.util.ArrayList;<a name="line.21"></a> |
| <span class="sourceLineNo">022</span>import java.util.Comparator;<a name="line.22"></a> |
| <span class="sourceLineNo">023</span>import java.util.List;<a name="line.23"></a> |
| <span class="sourceLineNo">024</span>import java.util.Map;<a name="line.24"></a> |
| <span class="sourceLineNo">025</span>import java.util.NavigableSet;<a name="line.25"></a> |
| <span class="sourceLineNo">026</span>import java.util.TreeMap;<a name="line.26"></a> |
| <span class="sourceLineNo">027</span>import java.util.TreeSet;<a name="line.27"></a> |
| <span class="sourceLineNo">028</span>import org.apache.hadoop.fs.StorageType;<a name="line.28"></a> |
| <span class="sourceLineNo">029</span>import org.apache.hadoop.hbase.util.DNS;<a name="line.29"></a> |
| <span class="sourceLineNo">030</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.30"></a> |
| <span class="sourceLineNo">031</span><a name="line.31"></a> |
| <span class="sourceLineNo">032</span>/**<a name="line.32"></a> |
| <span class="sourceLineNo">033</span> * Data structure to describe the distribution of HDFS blocks among hosts.<a name="line.33"></a> |
| <span class="sourceLineNo">034</span> *<a name="line.34"></a> |
| <span class="sourceLineNo">035</span> * Adding erroneous data will be ignored silently.<a name="line.35"></a> |
| <span class="sourceLineNo">036</span> */<a name="line.36"></a> |
| <span class="sourceLineNo">037</span>@InterfaceAudience.Private<a name="line.37"></a> |
| <span class="sourceLineNo">038</span>public class HDFSBlocksDistribution {<a name="line.38"></a> |
| <span class="sourceLineNo">039</span> private Map<String,HostAndWeight> hostAndWeights = null;<a name="line.39"></a> |
| <span class="sourceLineNo">040</span> private long uniqueBlocksTotalWeight = 0;<a name="line.40"></a> |
| <span class="sourceLineNo">041</span><a name="line.41"></a> |
| <span class="sourceLineNo">042</span> /**<a name="line.42"></a> |
| <span class="sourceLineNo">043</span> * Stores the hostname and weight for that hostname.<a name="line.43"></a> |
| <span class="sourceLineNo">044</span> *<a name="line.44"></a> |
| <span class="sourceLineNo">045</span> * This is used when determining the physical locations of the blocks making<a name="line.45"></a> |
| <span class="sourceLineNo">046</span> * up a region.<a name="line.46"></a> |
| <span class="sourceLineNo">047</span> *<a name="line.47"></a> |
| <span class="sourceLineNo">048</span> * To make a prioritized list of the hosts holding the most data of a region,<a name="line.48"></a> |
| <span class="sourceLineNo">049</span> * this class is used to count the total weight for each host. The weight is<a name="line.49"></a> |
| <span class="sourceLineNo">050</span> * currently just the size of the file.<a name="line.50"></a> |
| <span class="sourceLineNo">051</span> */<a name="line.51"></a> |
| <span class="sourceLineNo">052</span> public static class HostAndWeight {<a name="line.52"></a> |
| <span class="sourceLineNo">053</span><a name="line.53"></a> |
| <span class="sourceLineNo">054</span> private final String host;<a name="line.54"></a> |
| <span class="sourceLineNo">055</span> private long weight;<a name="line.55"></a> |
| <span class="sourceLineNo">056</span> private long weightForSsd;<a name="line.56"></a> |
| <span class="sourceLineNo">057</span><a name="line.57"></a> |
| <span class="sourceLineNo">058</span> /**<a name="line.58"></a> |
| <span class="sourceLineNo">059</span> * Constructor<a name="line.59"></a> |
| <span class="sourceLineNo">060</span> * @param host the host name<a name="line.60"></a> |
| <span class="sourceLineNo">061</span> * @param weight the weight<a name="line.61"></a> |
| <span class="sourceLineNo">062</span> * @param weightForSsd the weight for ssd<a name="line.62"></a> |
| <span class="sourceLineNo">063</span> */<a name="line.63"></a> |
| <span class="sourceLineNo">064</span> public HostAndWeight(String host, long weight, long weightForSsd) {<a name="line.64"></a> |
| <span class="sourceLineNo">065</span> this.host = host;<a name="line.65"></a> |
| <span class="sourceLineNo">066</span> this.weight = weight;<a name="line.66"></a> |
| <span class="sourceLineNo">067</span> this.weightForSsd = weightForSsd;<a name="line.67"></a> |
| <span class="sourceLineNo">068</span> }<a name="line.68"></a> |
| <span class="sourceLineNo">069</span><a name="line.69"></a> |
| <span class="sourceLineNo">070</span> /**<a name="line.70"></a> |
| <span class="sourceLineNo">071</span> * add weight<a name="line.71"></a> |
| <span class="sourceLineNo">072</span> * @param weight the weight<a name="line.72"></a> |
| <span class="sourceLineNo">073</span> * @param weightForSsd the weight for ssd<a name="line.73"></a> |
| <span class="sourceLineNo">074</span> */<a name="line.74"></a> |
| <span class="sourceLineNo">075</span> public void addWeight(long weight, long weightForSsd) {<a name="line.75"></a> |
| <span class="sourceLineNo">076</span> this.weight += weight;<a name="line.76"></a> |
| <span class="sourceLineNo">077</span> this.weightForSsd += weightForSsd;<a name="line.77"></a> |
| <span class="sourceLineNo">078</span> }<a name="line.78"></a> |
| <span class="sourceLineNo">079</span><a name="line.79"></a> |
| <span class="sourceLineNo">080</span> /**<a name="line.80"></a> |
| <span class="sourceLineNo">081</span> * @return the host name<a name="line.81"></a> |
| <span class="sourceLineNo">082</span> */<a name="line.82"></a> |
| <span class="sourceLineNo">083</span> public String getHost() {<a name="line.83"></a> |
| <span class="sourceLineNo">084</span> return host;<a name="line.84"></a> |
| <span class="sourceLineNo">085</span> }<a name="line.85"></a> |
| <span class="sourceLineNo">086</span><a name="line.86"></a> |
| <span class="sourceLineNo">087</span> /**<a name="line.87"></a> |
| <span class="sourceLineNo">088</span> * @return the weight<a name="line.88"></a> |
| <span class="sourceLineNo">089</span> */<a name="line.89"></a> |
| <span class="sourceLineNo">090</span> public long getWeight() {<a name="line.90"></a> |
| <span class="sourceLineNo">091</span> return weight;<a name="line.91"></a> |
| <span class="sourceLineNo">092</span> }<a name="line.92"></a> |
| <span class="sourceLineNo">093</span><a name="line.93"></a> |
| <span class="sourceLineNo">094</span> /**<a name="line.94"></a> |
| <span class="sourceLineNo">095</span> * @return the weight for ssd<a name="line.95"></a> |
| <span class="sourceLineNo">096</span> */<a name="line.96"></a> |
| <span class="sourceLineNo">097</span> public long getWeightForSsd() {<a name="line.97"></a> |
| <span class="sourceLineNo">098</span> return weightForSsd;<a name="line.98"></a> |
| <span class="sourceLineNo">099</span> }<a name="line.99"></a> |
| <span class="sourceLineNo">100</span><a name="line.100"></a> |
| <span class="sourceLineNo">101</span> /**<a name="line.101"></a> |
| <span class="sourceLineNo">102</span> * comparator used to sort hosts based on weight<a name="line.102"></a> |
| <span class="sourceLineNo">103</span> */<a name="line.103"></a> |
| <span class="sourceLineNo">104</span> public static class WeightComparator implements Comparator<HostAndWeight> {<a name="line.104"></a> |
| <span class="sourceLineNo">105</span> @Override<a name="line.105"></a> |
| <span class="sourceLineNo">106</span> public int compare(HostAndWeight l, HostAndWeight r) {<a name="line.106"></a> |
| <span class="sourceLineNo">107</span> if(l.getWeight() == r.getWeight()) {<a name="line.107"></a> |
| <span class="sourceLineNo">108</span> return l.getHost().compareTo(r.getHost());<a name="line.108"></a> |
| <span class="sourceLineNo">109</span> }<a name="line.109"></a> |
| <span class="sourceLineNo">110</span> return l.getWeight() < r.getWeight() ? -1 : 1;<a name="line.110"></a> |
| <span class="sourceLineNo">111</span> }<a name="line.111"></a> |
| <span class="sourceLineNo">112</span> }<a name="line.112"></a> |
| <span class="sourceLineNo">113</span> }<a name="line.113"></a> |
| <span class="sourceLineNo">114</span><a name="line.114"></a> |
| <span class="sourceLineNo">115</span> /**<a name="line.115"></a> |
| <span class="sourceLineNo">116</span> * Constructor<a name="line.116"></a> |
| <span class="sourceLineNo">117</span> */<a name="line.117"></a> |
| <span class="sourceLineNo">118</span> public HDFSBlocksDistribution() {<a name="line.118"></a> |
| <span class="sourceLineNo">119</span> this.hostAndWeights = new TreeMap<>();<a name="line.119"></a> |
| <span class="sourceLineNo">120</span> }<a name="line.120"></a> |
| <span class="sourceLineNo">121</span><a name="line.121"></a> |
| <span class="sourceLineNo">122</span> /**<a name="line.122"></a> |
| <span class="sourceLineNo">123</span> * @see java.lang.Object#toString()<a name="line.123"></a> |
| <span class="sourceLineNo">124</span> */<a name="line.124"></a> |
| <span class="sourceLineNo">125</span> @Override<a name="line.125"></a> |
| <span class="sourceLineNo">126</span> public synchronized String toString() {<a name="line.126"></a> |
| <span class="sourceLineNo">127</span> return "number of unique hosts in the distribution=" +<a name="line.127"></a> |
| <span class="sourceLineNo">128</span> this.hostAndWeights.size();<a name="line.128"></a> |
| <span class="sourceLineNo">129</span> }<a name="line.129"></a> |
| <span class="sourceLineNo">130</span><a name="line.130"></a> |
| <span class="sourceLineNo">131</span> /**<a name="line.131"></a> |
| <span class="sourceLineNo">132</span> * add some weight to a list of hosts, update the value of unique block weight<a name="line.132"></a> |
| <span class="sourceLineNo">133</span> * @param hosts the list of the host<a name="line.133"></a> |
| <span class="sourceLineNo">134</span> * @param weight the weight<a name="line.134"></a> |
| <span class="sourceLineNo">135</span> */<a name="line.135"></a> |
| <span class="sourceLineNo">136</span> public void addHostsAndBlockWeight(String[] hosts, long weight) {<a name="line.136"></a> |
| <span class="sourceLineNo">137</span> addHostsAndBlockWeight(hosts, weight, null);<a name="line.137"></a> |
| <span class="sourceLineNo">138</span> }<a name="line.138"></a> |
| <span class="sourceLineNo">139</span><a name="line.139"></a> |
| <span class="sourceLineNo">140</span> /**<a name="line.140"></a> |
| <span class="sourceLineNo">141</span> * add some weight to a list of hosts, update the value of unique block weight<a name="line.141"></a> |
| <span class="sourceLineNo">142</span> * @param hosts the list of the host<a name="line.142"></a> |
| <span class="sourceLineNo">143</span> * @param weight the weight<a name="line.143"></a> |
| <span class="sourceLineNo">144</span> */<a name="line.144"></a> |
| <span class="sourceLineNo">145</span> public void addHostsAndBlockWeight(String[] hosts, long weight, StorageType[] storageTypes) {<a name="line.145"></a> |
| <span class="sourceLineNo">146</span> if (hosts == null || hosts.length == 0) {<a name="line.146"></a> |
| <span class="sourceLineNo">147</span> // erroneous data<a name="line.147"></a> |
| <span class="sourceLineNo">148</span> return;<a name="line.148"></a> |
| <span class="sourceLineNo">149</span> }<a name="line.149"></a> |
| <span class="sourceLineNo">150</span><a name="line.150"></a> |
| <span class="sourceLineNo">151</span> addUniqueWeight(weight);<a name="line.151"></a> |
| <span class="sourceLineNo">152</span> if (storageTypes != null && storageTypes.length == hosts.length) {<a name="line.152"></a> |
| <span class="sourceLineNo">153</span> for (int i = 0; i < hosts.length; i++) {<a name="line.153"></a> |
| <span class="sourceLineNo">154</span> long weightForSsd = 0;<a name="line.154"></a> |
| <span class="sourceLineNo">155</span> if (storageTypes[i] == StorageType.SSD) {<a name="line.155"></a> |
| <span class="sourceLineNo">156</span> weightForSsd = weight;<a name="line.156"></a> |
| <span class="sourceLineNo">157</span> }<a name="line.157"></a> |
| <span class="sourceLineNo">158</span> addHostAndBlockWeight(hosts[i], weight, weightForSsd);<a name="line.158"></a> |
| <span class="sourceLineNo">159</span> }<a name="line.159"></a> |
| <span class="sourceLineNo">160</span> } else {<a name="line.160"></a> |
| <span class="sourceLineNo">161</span> for (String hostname : hosts) {<a name="line.161"></a> |
| <span class="sourceLineNo">162</span> addHostAndBlockWeight(hostname, weight, 0);<a name="line.162"></a> |
| <span class="sourceLineNo">163</span> }<a name="line.163"></a> |
| <span class="sourceLineNo">164</span> }<a name="line.164"></a> |
| <span class="sourceLineNo">165</span> }<a name="line.165"></a> |
| <span class="sourceLineNo">166</span><a name="line.166"></a> |
| <span class="sourceLineNo">167</span> /**<a name="line.167"></a> |
| <span class="sourceLineNo">168</span> * add some weight to the total unique weight<a name="line.168"></a> |
| <span class="sourceLineNo">169</span> * @param weight the weight<a name="line.169"></a> |
| <span class="sourceLineNo">170</span> */<a name="line.170"></a> |
| <span class="sourceLineNo">171</span> private void addUniqueWeight(long weight) {<a name="line.171"></a> |
| <span class="sourceLineNo">172</span> uniqueBlocksTotalWeight += weight;<a name="line.172"></a> |
| <span class="sourceLineNo">173</span> }<a name="line.173"></a> |
| <span class="sourceLineNo">174</span><a name="line.174"></a> |
| <span class="sourceLineNo">175</span> /**<a name="line.175"></a> |
| <span class="sourceLineNo">176</span> * add some weight to a specific host<a name="line.176"></a> |
| <span class="sourceLineNo">177</span> * @param host the host name<a name="line.177"></a> |
| <span class="sourceLineNo">178</span> * @param weight the weight<a name="line.178"></a> |
| <span class="sourceLineNo">179</span> * @param weightForSsd the weight for ssd<a name="line.179"></a> |
| <span class="sourceLineNo">180</span> */<a name="line.180"></a> |
| <span class="sourceLineNo">181</span> private void addHostAndBlockWeight(String host, long weight, long weightForSsd) {<a name="line.181"></a> |
| <span class="sourceLineNo">182</span> if (host == null) {<a name="line.182"></a> |
| <span class="sourceLineNo">183</span> // erroneous data<a name="line.183"></a> |
| <span class="sourceLineNo">184</span> return;<a name="line.184"></a> |
| <span class="sourceLineNo">185</span> }<a name="line.185"></a> |
| <span class="sourceLineNo">186</span><a name="line.186"></a> |
| <span class="sourceLineNo">187</span> HostAndWeight hostAndWeight = this.hostAndWeights.get(host);<a name="line.187"></a> |
| <span class="sourceLineNo">188</span> if(hostAndWeight == null) {<a name="line.188"></a> |
| <span class="sourceLineNo">189</span> hostAndWeight = new HostAndWeight(host, weight, weightForSsd);<a name="line.189"></a> |
| <span class="sourceLineNo">190</span> this.hostAndWeights.put(host, hostAndWeight);<a name="line.190"></a> |
| <span class="sourceLineNo">191</span> } else {<a name="line.191"></a> |
| <span class="sourceLineNo">192</span> hostAndWeight.addWeight(weight, weightForSsd);<a name="line.192"></a> |
| <span class="sourceLineNo">193</span> }<a name="line.193"></a> |
| <span class="sourceLineNo">194</span> }<a name="line.194"></a> |
| <span class="sourceLineNo">195</span><a name="line.195"></a> |
| <span class="sourceLineNo">196</span> /**<a name="line.196"></a> |
| <span class="sourceLineNo">197</span> * @return the hosts and their weights<a name="line.197"></a> |
| <span class="sourceLineNo">198</span> */<a name="line.198"></a> |
| <span class="sourceLineNo">199</span> public Map<String,HostAndWeight> getHostAndWeights() {<a name="line.199"></a> |
| <span class="sourceLineNo">200</span> return this.hostAndWeights;<a name="line.200"></a> |
| <span class="sourceLineNo">201</span> }<a name="line.201"></a> |
| <span class="sourceLineNo">202</span><a name="line.202"></a> |
| <span class="sourceLineNo">203</span> /**<a name="line.203"></a> |
| <span class="sourceLineNo">204</span> * return the weight for a specific host, that will be the total bytes of all<a name="line.204"></a> |
| <span class="sourceLineNo">205</span> * blocks on the host<a name="line.205"></a> |
| <span class="sourceLineNo">206</span> * @param host the host name<a name="line.206"></a> |
| <span class="sourceLineNo">207</span> * @return the weight of the given host<a name="line.207"></a> |
| <span class="sourceLineNo">208</span> */<a name="line.208"></a> |
| <span class="sourceLineNo">209</span> public long getWeight(String host) {<a name="line.209"></a> |
| <span class="sourceLineNo">210</span> long weight = 0;<a name="line.210"></a> |
| <span class="sourceLineNo">211</span> if (host != null) {<a name="line.211"></a> |
| <span class="sourceLineNo">212</span> HostAndWeight hostAndWeight = this.hostAndWeights.get(host);<a name="line.212"></a> |
| <span class="sourceLineNo">213</span> if(hostAndWeight != null) {<a name="line.213"></a> |
| <span class="sourceLineNo">214</span> weight = hostAndWeight.getWeight();<a name="line.214"></a> |
| <span class="sourceLineNo">215</span> }<a name="line.215"></a> |
| <span class="sourceLineNo">216</span> }<a name="line.216"></a> |
| <span class="sourceLineNo">217</span> return weight;<a name="line.217"></a> |
| <span class="sourceLineNo">218</span> }<a name="line.218"></a> |
| <span class="sourceLineNo">219</span><a name="line.219"></a> |
| <span class="sourceLineNo">220</span> /**<a name="line.220"></a> |
| <span class="sourceLineNo">221</span> * @return the sum of all unique blocks' weight<a name="line.221"></a> |
| <span class="sourceLineNo">222</span> */<a name="line.222"></a> |
| <span class="sourceLineNo">223</span> public long getUniqueBlocksTotalWeight() {<a name="line.223"></a> |
| <span class="sourceLineNo">224</span> return uniqueBlocksTotalWeight;<a name="line.224"></a> |
| <span class="sourceLineNo">225</span> }<a name="line.225"></a> |
| <span class="sourceLineNo">226</span><a name="line.226"></a> |
| <span class="sourceLineNo">227</span> /**<a name="line.227"></a> |
| <span class="sourceLineNo">228</span> * Implementations 'visit' hostAndWeight.<a name="line.228"></a> |
| <span class="sourceLineNo">229</span> */<a name="line.229"></a> |
| <span class="sourceLineNo">230</span> public interface Visitor {<a name="line.230"></a> |
| <span class="sourceLineNo">231</span> long visit(final HostAndWeight hostAndWeight);<a name="line.231"></a> |
| <span class="sourceLineNo">232</span> }<a name="line.232"></a> |
| <span class="sourceLineNo">233</span><a name="line.233"></a> |
| <span class="sourceLineNo">234</span> /**<a name="line.234"></a> |
| <span class="sourceLineNo">235</span> * @param host the host name<a name="line.235"></a> |
| <span class="sourceLineNo">236</span> * @return the locality index of the given host<a name="line.236"></a> |
| <span class="sourceLineNo">237</span> */<a name="line.237"></a> |
| <span class="sourceLineNo">238</span> public float getBlockLocalityIndex(String host) {<a name="line.238"></a> |
| <span class="sourceLineNo">239</span> if (uniqueBlocksTotalWeight == 0) {<a name="line.239"></a> |
| <span class="sourceLineNo">240</span> return 0.0f;<a name="line.240"></a> |
| <span class="sourceLineNo">241</span> } else {<a name="line.241"></a> |
| <span class="sourceLineNo">242</span> return (float) getBlocksLocalityWeightInternal(host, HostAndWeight::getWeight)<a name="line.242"></a> |
| <span class="sourceLineNo">243</span> / (float) uniqueBlocksTotalWeight;<a name="line.243"></a> |
| <span class="sourceLineNo">244</span> }<a name="line.244"></a> |
| <span class="sourceLineNo">245</span> }<a name="line.245"></a> |
| <span class="sourceLineNo">246</span><a name="line.246"></a> |
| <span class="sourceLineNo">247</span> /**<a name="line.247"></a> |
| <span class="sourceLineNo">248</span> * @param host the host name<a name="line.248"></a> |
| <span class="sourceLineNo">249</span> * @return the locality index with ssd of the given host<a name="line.249"></a> |
| <span class="sourceLineNo">250</span> */<a name="line.250"></a> |
| <span class="sourceLineNo">251</span> public float getBlockLocalityIndexForSsd(String host) {<a name="line.251"></a> |
| <span class="sourceLineNo">252</span> if (uniqueBlocksTotalWeight == 0) {<a name="line.252"></a> |
| <span class="sourceLineNo">253</span> return 0.0f;<a name="line.253"></a> |
| <span class="sourceLineNo">254</span> } else {<a name="line.254"></a> |
| <span class="sourceLineNo">255</span> return (float) getBlocksLocalityWeightInternal(host, HostAndWeight::getWeightForSsd)<a name="line.255"></a> |
| <span class="sourceLineNo">256</span> / (float) uniqueBlocksTotalWeight;<a name="line.256"></a> |
| <span class="sourceLineNo">257</span> }<a name="line.257"></a> |
| <span class="sourceLineNo">258</span> }<a name="line.258"></a> |
| <span class="sourceLineNo">259</span><a name="line.259"></a> |
| <span class="sourceLineNo">260</span> /**<a name="line.260"></a> |
| <span class="sourceLineNo">261</span> * @param host the host name<a name="line.261"></a> |
| <span class="sourceLineNo">262</span> * @return the blocks local weight of the given host<a name="line.262"></a> |
| <span class="sourceLineNo">263</span> */<a name="line.263"></a> |
| <span class="sourceLineNo">264</span> public long getBlocksLocalWeight(String host) {<a name="line.264"></a> |
| <span class="sourceLineNo">265</span> return getBlocksLocalityWeightInternal(host, HostAndWeight::getWeight);<a name="line.265"></a> |
| <span class="sourceLineNo">266</span> }<a name="line.266"></a> |
| <span class="sourceLineNo">267</span><a name="line.267"></a> |
| <span class="sourceLineNo">268</span> /**<a name="line.268"></a> |
| <span class="sourceLineNo">269</span> * @param host the host name<a name="line.269"></a> |
| <span class="sourceLineNo">270</span> * @return the blocks local with ssd weight of the given host<a name="line.270"></a> |
| <span class="sourceLineNo">271</span> */<a name="line.271"></a> |
| <span class="sourceLineNo">272</span> public long getBlocksLocalWithSsdWeight(String host) {<a name="line.272"></a> |
| <span class="sourceLineNo">273</span> return getBlocksLocalityWeightInternal(host, HostAndWeight::getWeightForSsd);<a name="line.273"></a> |
| <span class="sourceLineNo">274</span> }<a name="line.274"></a> |
| <span class="sourceLineNo">275</span><a name="line.275"></a> |
| <span class="sourceLineNo">276</span> /**<a name="line.276"></a> |
| <span class="sourceLineNo">277</span> * @param host the host name<a name="line.277"></a> |
| <span class="sourceLineNo">278</span> * @return the locality index of the given host<a name="line.278"></a> |
| <span class="sourceLineNo">279</span> */<a name="line.279"></a> |
| <span class="sourceLineNo">280</span> private long getBlocksLocalityWeightInternal(String host, Visitor visitor) {<a name="line.280"></a> |
| <span class="sourceLineNo">281</span> long localityIndex = 0;<a name="line.281"></a> |
| <span class="sourceLineNo">282</span> HostAndWeight hostAndWeight = this.hostAndWeights.get(host);<a name="line.282"></a> |
| <span class="sourceLineNo">283</span> // Compatible with local mode, see HBASE-24569<a name="line.283"></a> |
| <span class="sourceLineNo">284</span> if (hostAndWeight == null) {<a name="line.284"></a> |
| <span class="sourceLineNo">285</span> String currentHost = "";<a name="line.285"></a> |
| <span class="sourceLineNo">286</span> try {<a name="line.286"></a> |
| <span class="sourceLineNo">287</span> currentHost = DNS.getDefaultHost("default", "default");<a name="line.287"></a> |
| <span class="sourceLineNo">288</span> } catch (Exception e) {<a name="line.288"></a> |
| <span class="sourceLineNo">289</span> // Just ignore, it's ok, avoid too many log info<a name="line.289"></a> |
| <span class="sourceLineNo">290</span> }<a name="line.290"></a> |
| <span class="sourceLineNo">291</span> if (host.equals(currentHost)) {<a name="line.291"></a> |
| <span class="sourceLineNo">292</span> hostAndWeight = this.hostAndWeights.get(HConstants.LOCALHOST);<a name="line.292"></a> |
| <span class="sourceLineNo">293</span> }<a name="line.293"></a> |
| <span class="sourceLineNo">294</span> }<a name="line.294"></a> |
| <span class="sourceLineNo">295</span> if (hostAndWeight != null && uniqueBlocksTotalWeight != 0) {<a name="line.295"></a> |
| <span class="sourceLineNo">296</span> localityIndex = visitor.visit(hostAndWeight);<a name="line.296"></a> |
| <span class="sourceLineNo">297</span> }<a name="line.297"></a> |
| <span class="sourceLineNo">298</span> return localityIndex;<a name="line.298"></a> |
| <span class="sourceLineNo">299</span> }<a name="line.299"></a> |
| <span class="sourceLineNo">300</span><a name="line.300"></a> |
| <span class="sourceLineNo">301</span> /**<a name="line.301"></a> |
| <span class="sourceLineNo">302</span> * This will add the distribution from input to this object<a name="line.302"></a> |
| <span class="sourceLineNo">303</span> * @param otherBlocksDistribution the other hdfs blocks distribution<a name="line.303"></a> |
| <span class="sourceLineNo">304</span> */<a name="line.304"></a> |
| <span class="sourceLineNo">305</span> public void add(HDFSBlocksDistribution otherBlocksDistribution) {<a name="line.305"></a> |
| <span class="sourceLineNo">306</span> Map<String,HostAndWeight> otherHostAndWeights =<a name="line.306"></a> |
| <span class="sourceLineNo">307</span> otherBlocksDistribution.getHostAndWeights();<a name="line.307"></a> |
| <span class="sourceLineNo">308</span> for (Map.Entry<String, HostAndWeight> otherHostAndWeight:<a name="line.308"></a> |
| <span class="sourceLineNo">309</span> otherHostAndWeights.entrySet()) {<a name="line.309"></a> |
| <span class="sourceLineNo">310</span> addHostAndBlockWeight(otherHostAndWeight.getValue().host,<a name="line.310"></a> |
| <span class="sourceLineNo">311</span> otherHostAndWeight.getValue().weight, otherHostAndWeight.getValue().weightForSsd);<a name="line.311"></a> |
| <span class="sourceLineNo">312</span> }<a name="line.312"></a> |
| <span class="sourceLineNo">313</span> addUniqueWeight(otherBlocksDistribution.getUniqueBlocksTotalWeight());<a name="line.313"></a> |
| <span class="sourceLineNo">314</span> }<a name="line.314"></a> |
| <span class="sourceLineNo">315</span><a name="line.315"></a> |
| <span class="sourceLineNo">316</span> /**<a name="line.316"></a> |
| <span class="sourceLineNo">317</span> * return the sorted list of hosts in terms of their weights<a name="line.317"></a> |
| <span class="sourceLineNo">318</span> */<a name="line.318"></a> |
| <span class="sourceLineNo">319</span> public List<String> getTopHosts() {<a name="line.319"></a> |
| <span class="sourceLineNo">320</span> HostAndWeight[] hostAndWeights = getTopHostsWithWeights();<a name="line.320"></a> |
| <span class="sourceLineNo">321</span> List<String> topHosts = new ArrayList<>(hostAndWeights.length);<a name="line.321"></a> |
| <span class="sourceLineNo">322</span> for(HostAndWeight haw : hostAndWeights) {<a name="line.322"></a> |
| <span class="sourceLineNo">323</span> topHosts.add(haw.getHost());<a name="line.323"></a> |
| <span class="sourceLineNo">324</span> }<a name="line.324"></a> |
| <span class="sourceLineNo">325</span> return topHosts;<a name="line.325"></a> |
| <span class="sourceLineNo">326</span> }<a name="line.326"></a> |
| <span class="sourceLineNo">327</span><a name="line.327"></a> |
| <span class="sourceLineNo">328</span> /**<a name="line.328"></a> |
| <span class="sourceLineNo">329</span> * return the sorted list of hosts in terms of their weights<a name="line.329"></a> |
| <span class="sourceLineNo">330</span> */<a name="line.330"></a> |
| <span class="sourceLineNo">331</span> public HostAndWeight[] getTopHostsWithWeights() {<a name="line.331"></a> |
| <span class="sourceLineNo">332</span> NavigableSet<HostAndWeight> orderedHosts = new TreeSet<>(new HostAndWeight.WeightComparator());<a name="line.332"></a> |
| <span class="sourceLineNo">333</span> orderedHosts.addAll(this.hostAndWeights.values());<a name="line.333"></a> |
| <span class="sourceLineNo">334</span> return orderedHosts.descendingSet().toArray(new HostAndWeight[orderedHosts.size()]);<a name="line.334"></a> |
| <span class="sourceLineNo">335</span> }<a name="line.335"></a> |
| <span class="sourceLineNo">336</span><a name="line.336"></a> |
| <span class="sourceLineNo">337</span>}<a name="line.337"></a> |
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| </pre> |
| </div> |
| </body> |
| </html> |