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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.util;<a name="line.19"></a> |
| <span class="sourceLineNo">020</span><a name="line.20"></a> |
| <span class="sourceLineNo">021</span>import java.io.IOException;<a name="line.21"></a> |
| <span class="sourceLineNo">022</span>import java.util.HashMap;<a name="line.22"></a> |
| <span class="sourceLineNo">023</span>import java.util.Map;<a name="line.23"></a> |
| <span class="sourceLineNo">024</span><a name="line.24"></a> |
| <span class="sourceLineNo">025</span>import java.util.concurrent.atomic.AtomicInteger;<a name="line.25"></a> |
| <span class="sourceLineNo">026</span><a name="line.26"></a> |
| <span class="sourceLineNo">027</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.27"></a> |
| <span class="sourceLineNo">028</span>import org.slf4j.Logger;<a name="line.28"></a> |
| <span class="sourceLineNo">029</span>import org.slf4j.LoggerFactory;<a name="line.29"></a> |
| <span class="sourceLineNo">030</span>import org.apache.hadoop.fs.BlockLocation;<a name="line.30"></a> |
| <span class="sourceLineNo">031</span>import org.apache.hadoop.fs.FileStatus;<a name="line.31"></a> |
| <span class="sourceLineNo">032</span>import org.apache.hadoop.fs.FileSystem;<a name="line.32"></a> |
| <span class="sourceLineNo">033</span>import org.apache.hadoop.fs.Path;<a name="line.33"></a> |
| <span class="sourceLineNo">034</span>import org.apache.hadoop.hbase.util.FSUtils;<a name="line.34"></a> |
| <span class="sourceLineNo">035</span><a name="line.35"></a> |
| <span class="sourceLineNo">036</span>/**<a name="line.36"></a> |
| <span class="sourceLineNo">037</span> * Thread that walks over the filesystem, and computes the mappings<a name="line.37"></a> |
| <span class="sourceLineNo">038</span> * Region -> BestHost and Region -> {@code Map<HostName, fractional-locality-of-region>}<a name="line.38"></a> |
| <span class="sourceLineNo">039</span> *<a name="line.39"></a> |
| <span class="sourceLineNo">040</span> */<a name="line.40"></a> |
| <span class="sourceLineNo">041</span>@InterfaceAudience.Private<a name="line.41"></a> |
| <span class="sourceLineNo">042</span>class FSRegionScanner implements Runnable {<a name="line.42"></a> |
| <span class="sourceLineNo">043</span> static private final Logger LOG = LoggerFactory.getLogger(FSRegionScanner.class);<a name="line.43"></a> |
| <span class="sourceLineNo">044</span><a name="line.44"></a> |
| <span class="sourceLineNo">045</span> private Path regionPath;<a name="line.45"></a> |
| <span class="sourceLineNo">046</span><a name="line.46"></a> |
| <span class="sourceLineNo">047</span> /**<a name="line.47"></a> |
| <span class="sourceLineNo">048</span> * The file system used<a name="line.48"></a> |
| <span class="sourceLineNo">049</span> */<a name="line.49"></a> |
| <span class="sourceLineNo">050</span> private FileSystem fs;<a name="line.50"></a> |
| <span class="sourceLineNo">051</span><a name="line.51"></a> |
| <span class="sourceLineNo">052</span> /**<a name="line.52"></a> |
| <span class="sourceLineNo">053</span> * Maps each region to the RS with highest locality for that region.<a name="line.53"></a> |
| <span class="sourceLineNo">054</span> */<a name="line.54"></a> |
| <span class="sourceLineNo">055</span> private final Map<String,String> regionToBestLocalityRSMapping;<a name="line.55"></a> |
| <span class="sourceLineNo">056</span><a name="line.56"></a> |
| <span class="sourceLineNo">057</span> /**<a name="line.57"></a> |
| <span class="sourceLineNo">058</span> * Maps region encoded names to maps of hostnames to fractional locality of<a name="line.58"></a> |
| <span class="sourceLineNo">059</span> * that region on that host.<a name="line.59"></a> |
| <span class="sourceLineNo">060</span> */<a name="line.60"></a> |
| <span class="sourceLineNo">061</span> private Map<String, Map<String, Float>> regionDegreeLocalityMapping;<a name="line.61"></a> |
| <span class="sourceLineNo">062</span><a name="line.62"></a> |
| <span class="sourceLineNo">063</span> FSRegionScanner(FileSystem fs, Path regionPath,<a name="line.63"></a> |
| <span class="sourceLineNo">064</span> Map<String, String> regionToBestLocalityRSMapping,<a name="line.64"></a> |
| <span class="sourceLineNo">065</span> Map<String, Map<String, Float>> regionDegreeLocalityMapping) {<a name="line.65"></a> |
| <span class="sourceLineNo">066</span> this.fs = fs;<a name="line.66"></a> |
| <span class="sourceLineNo">067</span> this.regionPath = regionPath;<a name="line.67"></a> |
| <span class="sourceLineNo">068</span> this.regionToBestLocalityRSMapping = regionToBestLocalityRSMapping;<a name="line.68"></a> |
| <span class="sourceLineNo">069</span> this.regionDegreeLocalityMapping = regionDegreeLocalityMapping;<a name="line.69"></a> |
| <span class="sourceLineNo">070</span> }<a name="line.70"></a> |
| <span class="sourceLineNo">071</span><a name="line.71"></a> |
| <span class="sourceLineNo">072</span> @Override<a name="line.72"></a> |
| <span class="sourceLineNo">073</span> public void run() {<a name="line.73"></a> |
| <span class="sourceLineNo">074</span> try {<a name="line.74"></a> |
| <span class="sourceLineNo">075</span> // empty the map for each region<a name="line.75"></a> |
| <span class="sourceLineNo">076</span> Map<String, AtomicInteger> blockCountMap = new HashMap<>();<a name="line.76"></a> |
| <span class="sourceLineNo">077</span><a name="line.77"></a> |
| <span class="sourceLineNo">078</span> //get table name<a name="line.78"></a> |
| <span class="sourceLineNo">079</span> String tableName = regionPath.getParent().getName();<a name="line.79"></a> |
| <span class="sourceLineNo">080</span> int totalBlkCount = 0;<a name="line.80"></a> |
| <span class="sourceLineNo">081</span><a name="line.81"></a> |
| <span class="sourceLineNo">082</span> // ignore null<a name="line.82"></a> |
| <span class="sourceLineNo">083</span> FileStatus[] cfList = fs.listStatus(regionPath, new FSUtils.FamilyDirFilter(fs));<a name="line.83"></a> |
| <span class="sourceLineNo">084</span> if (null == cfList) {<a name="line.84"></a> |
| <span class="sourceLineNo">085</span> return;<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> // for each cf, get all the blocks information<a name="line.88"></a> |
| <span class="sourceLineNo">089</span> for (FileStatus cfStatus : cfList) {<a name="line.89"></a> |
| <span class="sourceLineNo">090</span> if (!cfStatus.isDirectory()) {<a name="line.90"></a> |
| <span class="sourceLineNo">091</span> // skip because this is not a CF directory<a name="line.91"></a> |
| <span class="sourceLineNo">092</span> continue;<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> FileStatus[] storeFileLists = fs.listStatus(cfStatus.getPath());<a name="line.95"></a> |
| <span class="sourceLineNo">096</span> if (null == storeFileLists) {<a name="line.96"></a> |
| <span class="sourceLineNo">097</span> continue;<a name="line.97"></a> |
| <span class="sourceLineNo">098</span> }<a name="line.98"></a> |
| <span class="sourceLineNo">099</span><a name="line.99"></a> |
| <span class="sourceLineNo">100</span> for (FileStatus storeFile : storeFileLists) {<a name="line.100"></a> |
| <span class="sourceLineNo">101</span> BlockLocation[] blkLocations =<a name="line.101"></a> |
| <span class="sourceLineNo">102</span> fs.getFileBlockLocations(storeFile, 0, storeFile.getLen());<a name="line.102"></a> |
| <span class="sourceLineNo">103</span> if (null == blkLocations) {<a name="line.103"></a> |
| <span class="sourceLineNo">104</span> continue;<a name="line.104"></a> |
| <span class="sourceLineNo">105</span> }<a name="line.105"></a> |
| <span class="sourceLineNo">106</span><a name="line.106"></a> |
| <span class="sourceLineNo">107</span> totalBlkCount += blkLocations.length;<a name="line.107"></a> |
| <span class="sourceLineNo">108</span> for(BlockLocation blk: blkLocations) {<a name="line.108"></a> |
| <span class="sourceLineNo">109</span> for (String host: blk.getHosts()) {<a name="line.109"></a> |
| <span class="sourceLineNo">110</span> AtomicInteger count = blockCountMap.get(host);<a name="line.110"></a> |
| <span class="sourceLineNo">111</span> if (count == null) {<a name="line.111"></a> |
| <span class="sourceLineNo">112</span> count = new AtomicInteger(0);<a name="line.112"></a> |
| <span class="sourceLineNo">113</span> blockCountMap.put(host, count);<a name="line.113"></a> |
| <span class="sourceLineNo">114</span> }<a name="line.114"></a> |
| <span class="sourceLineNo">115</span> count.incrementAndGet();<a name="line.115"></a> |
| <span class="sourceLineNo">116</span> }<a name="line.116"></a> |
| <span class="sourceLineNo">117</span> }<a name="line.117"></a> |
| <span class="sourceLineNo">118</span> }<a name="line.118"></a> |
| <span class="sourceLineNo">119</span> }<a name="line.119"></a> |
| <span class="sourceLineNo">120</span><a name="line.120"></a> |
| <span class="sourceLineNo">121</span> if (regionToBestLocalityRSMapping != null) {<a name="line.121"></a> |
| <span class="sourceLineNo">122</span> int largestBlkCount = 0;<a name="line.122"></a> |
| <span class="sourceLineNo">123</span> String hostToRun = null;<a name="line.123"></a> |
| <span class="sourceLineNo">124</span> for (Map.Entry<String, AtomicInteger> entry : blockCountMap.entrySet()) {<a name="line.124"></a> |
| <span class="sourceLineNo">125</span> String host = entry.getKey();<a name="line.125"></a> |
| <span class="sourceLineNo">126</span><a name="line.126"></a> |
| <span class="sourceLineNo">127</span> int tmp = entry.getValue().get();<a name="line.127"></a> |
| <span class="sourceLineNo">128</span> if (tmp > largestBlkCount) {<a name="line.128"></a> |
| <span class="sourceLineNo">129</span> largestBlkCount = tmp;<a name="line.129"></a> |
| <span class="sourceLineNo">130</span> hostToRun = host;<a name="line.130"></a> |
| <span class="sourceLineNo">131</span> }<a name="line.131"></a> |
| <span class="sourceLineNo">132</span> }<a name="line.132"></a> |
| <span class="sourceLineNo">133</span><a name="line.133"></a> |
| <span class="sourceLineNo">134</span> // empty regions could make this null<a name="line.134"></a> |
| <span class="sourceLineNo">135</span> if (null == hostToRun) {<a name="line.135"></a> |
| <span class="sourceLineNo">136</span> return;<a name="line.136"></a> |
| <span class="sourceLineNo">137</span> }<a name="line.137"></a> |
| <span class="sourceLineNo">138</span><a name="line.138"></a> |
| <span class="sourceLineNo">139</span> if (hostToRun.endsWith(".")) {<a name="line.139"></a> |
| <span class="sourceLineNo">140</span> hostToRun = hostToRun.substring(0, hostToRun.length()-1);<a name="line.140"></a> |
| <span class="sourceLineNo">141</span> }<a name="line.141"></a> |
| <span class="sourceLineNo">142</span> String name = tableName + ":" + regionPath.getName();<a name="line.142"></a> |
| <span class="sourceLineNo">143</span> synchronized (regionToBestLocalityRSMapping) {<a name="line.143"></a> |
| <span class="sourceLineNo">144</span> regionToBestLocalityRSMapping.put(name, hostToRun);<a name="line.144"></a> |
| <span class="sourceLineNo">145</span> }<a name="line.145"></a> |
| <span class="sourceLineNo">146</span> }<a name="line.146"></a> |
| <span class="sourceLineNo">147</span><a name="line.147"></a> |
| <span class="sourceLineNo">148</span> if (regionDegreeLocalityMapping != null && totalBlkCount > 0) {<a name="line.148"></a> |
| <span class="sourceLineNo">149</span> Map<String, Float> hostLocalityMap = new HashMap<>();<a name="line.149"></a> |
| <span class="sourceLineNo">150</span> for (Map.Entry<String, AtomicInteger> entry : blockCountMap.entrySet()) {<a name="line.150"></a> |
| <span class="sourceLineNo">151</span> String host = entry.getKey();<a name="line.151"></a> |
| <span class="sourceLineNo">152</span> if (host.endsWith(".")) {<a name="line.152"></a> |
| <span class="sourceLineNo">153</span> host = host.substring(0, host.length() - 1);<a name="line.153"></a> |
| <span class="sourceLineNo">154</span> }<a name="line.154"></a> |
| <span class="sourceLineNo">155</span> // Locality is fraction of blocks local to this host.<a name="line.155"></a> |
| <span class="sourceLineNo">156</span> float locality = ((float)entry.getValue().get()) / totalBlkCount;<a name="line.156"></a> |
| <span class="sourceLineNo">157</span> hostLocalityMap.put(host, locality);<a name="line.157"></a> |
| <span class="sourceLineNo">158</span> }<a name="line.158"></a> |
| <span class="sourceLineNo">159</span> // Put the locality map into the result map, keyed by the encoded name<a name="line.159"></a> |
| <span class="sourceLineNo">160</span> // of the region.<a name="line.160"></a> |
| <span class="sourceLineNo">161</span> regionDegreeLocalityMapping.put(regionPath.getName(), hostLocalityMap);<a name="line.161"></a> |
| <span class="sourceLineNo">162</span> }<a name="line.162"></a> |
| <span class="sourceLineNo">163</span> } catch (IOException e) {<a name="line.163"></a> |
| <span class="sourceLineNo">164</span> LOG.warn("Problem scanning file system", e);<a name="line.164"></a> |
| <span class="sourceLineNo">165</span> } catch (RuntimeException e) {<a name="line.165"></a> |
| <span class="sourceLineNo">166</span> LOG.warn("Problem scanning file system", e);<a name="line.166"></a> |
| <span class="sourceLineNo">167</span> }<a name="line.167"></a> |
| <span class="sourceLineNo">168</span> }<a name="line.168"></a> |
| <span class="sourceLineNo">169</span>}<a name="line.169"></a> |
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| </pre> |
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