http://git-wip-us.apache.org/repos/asf/hbase-site/blob/4f8b8424/devapidocs/src-html/org/apache/hadoop/hbase/Version.html ---------------------------------------------------------------------- diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/Version.html b/devapidocs/src-html/org/apache/hadoop/hbase/Version.html index 6e51c4e..5a2a23d 100644 --- a/devapidocs/src-html/org/apache/hadoop/hbase/Version.html +++ b/devapidocs/src-html/org/apache/hadoop/hbase/Version.html @@ -18,9 +18,9 @@ <span class="sourceLineNo">010</span> public static final String version = "3.0.0-SNAPSHOT";<a name="line.10"></a> <span class="sourceLineNo">011</span> public static final String revision = "";<a name="line.11"></a> <span class="sourceLineNo">012</span> public static final String user = "jenkins";<a name="line.12"></a> -<span class="sourceLineNo">013</span> public static final String date = "Sat Dec 15 14:43:55 UTC 2018";<a name="line.13"></a> +<span class="sourceLineNo">013</span> public static final String date = "Tue Dec 18 14:46:13 UTC 2018";<a name="line.13"></a> <span class="sourceLineNo">014</span> public static final String url = "git://jenkins-websites1.apache.org/home/jenkins/jenkins-slave/workspace/hbase_generate_website/hbase";<a name="line.14"></a> -<span class="sourceLineNo">015</span> public static final String srcChecksum = "25dbb3fd216cbc954b8b2ebf17377a47";<a name="line.15"></a> +<span class="sourceLineNo">015</span> public static final String srcChecksum = "0ff9598693406383f0355b09c8c7ea64";<a name="line.15"></a> <span class="sourceLineNo">016</span>}<a name="line.16"></a>
http://git-wip-us.apache.org/repos/asf/hbase-site/blob/4f8b8424/devapidocs/src-html/org/apache/hadoop/hbase/io/hfile/BlockCacheFactory.ExternalBlockCaches.html ---------------------------------------------------------------------- diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/io/hfile/BlockCacheFactory.ExternalBlockCaches.html b/devapidocs/src-html/org/apache/hadoop/hbase/io/hfile/BlockCacheFactory.ExternalBlockCaches.html new file mode 100644 index 0000000..2a70085 --- /dev/null +++ b/devapidocs/src-html/org/apache/hadoop/hbase/io/hfile/BlockCacheFactory.ExternalBlockCaches.html @@ -0,0 +1,298 @@ +<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd";> +<html lang="en"> +<head> +<title>Source code</title> +<link rel="stylesheet" type="text/css" href="../../../../../../../stylesheet.css" title="Style"> +</head> +<body> +<div class="sourceContainer"> +<pre><span class="sourceLineNo">001</span>/**<a name="line.1"></a> +<span class="sourceLineNo">002</span> * Licensed to the Apache Software Foundation (ASF) under one<a name="line.2"></a> +<span class="sourceLineNo">003</span> * or more contributor license agreements. See the NOTICE file<a name="line.3"></a> +<span class="sourceLineNo">004</span> * distributed with this work for additional information<a name="line.4"></a> +<span class="sourceLineNo">005</span> * regarding copyright ownership. The ASF licenses this file<a name="line.5"></a> +<span class="sourceLineNo">006</span> * to you under the Apache License, Version 2.0 (the<a name="line.6"></a> +<span class="sourceLineNo">007</span> * "License"); you may not use this file except in compliance<a name="line.7"></a> +<span class="sourceLineNo">008</span> * with the License. You may obtain a copy of the License at<a name="line.8"></a> +<span class="sourceLineNo">009</span> *<a name="line.9"></a> +<span class="sourceLineNo">010</span> * http://www.apache.org/licenses/LICENSE-2.0<a name="line.10"></a> +<span class="sourceLineNo">011</span> *<a name="line.11"></a> +<span class="sourceLineNo">012</span> * Unless required by applicable law or agreed to in writing, software<a name="line.12"></a> +<span class="sourceLineNo">013</span> * distributed under the License is distributed on an "AS IS" BASIS,<a name="line.13"></a> +<span class="sourceLineNo">014</span> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<a name="line.14"></a> +<span class="sourceLineNo">015</span> * See the License for the specific language governing permissions and<a name="line.15"></a> +<span class="sourceLineNo">016</span> * limitations under the License.<a name="line.16"></a> +<span class="sourceLineNo">017</span> */<a name="line.17"></a> +<span class="sourceLineNo">018</span>package org.apache.hadoop.hbase.io.hfile;<a name="line.18"></a> +<span class="sourceLineNo">019</span><a name="line.19"></a> +<span class="sourceLineNo">020</span>import static org.apache.hadoop.hbase.HConstants.BUCKET_CACHE_IOENGINE_KEY;<a name="line.20"></a> +<span class="sourceLineNo">021</span>import static org.apache.hadoop.hbase.HConstants.BUCKET_CACHE_SIZE_KEY;<a name="line.21"></a> +<span class="sourceLineNo">022</span><a name="line.22"></a> +<span class="sourceLineNo">023</span>import java.io.IOException;<a name="line.23"></a> +<span class="sourceLineNo">024</span><a name="line.24"></a> +<span class="sourceLineNo">025</span>import org.apache.hadoop.conf.Configuration;<a name="line.25"></a> +<span class="sourceLineNo">026</span>import org.apache.hadoop.hbase.HConstants;<a name="line.26"></a> +<span class="sourceLineNo">027</span>import org.apache.hadoop.hbase.io.hfile.bucket.BucketCache;<a name="line.27"></a> +<span class="sourceLineNo">028</span>import org.apache.hadoop.hbase.io.util.MemorySizeUtil;<a name="line.28"></a> +<span class="sourceLineNo">029</span>import org.apache.hadoop.hbase.util.ReflectionUtils;<a name="line.29"></a> +<span class="sourceLineNo">030</span>import org.apache.hadoop.util.StringUtils;<a name="line.30"></a> +<span class="sourceLineNo">031</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.31"></a> +<span class="sourceLineNo">032</span>import org.slf4j.Logger;<a name="line.32"></a> +<span class="sourceLineNo">033</span>import org.slf4j.LoggerFactory;<a name="line.33"></a> +<span class="sourceLineNo">034</span><a name="line.34"></a> +<span class="sourceLineNo">035</span>@InterfaceAudience.Private<a name="line.35"></a> +<span class="sourceLineNo">036</span>public final class BlockCacheFactory {<a name="line.36"></a> +<span class="sourceLineNo">037</span><a name="line.37"></a> +<span class="sourceLineNo">038</span> private static final Logger LOG = LoggerFactory.getLogger(BlockCacheFactory.class.getName());<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> * Configuration keys for Bucket cache<a name="line.41"></a> +<span class="sourceLineNo">042</span> */<a name="line.42"></a> +<span class="sourceLineNo">043</span><a name="line.43"></a> +<span class="sourceLineNo">044</span> /**<a name="line.44"></a> +<span class="sourceLineNo">045</span> * If the chosen ioengine can persist its state across restarts, the path to the file to persist<a name="line.45"></a> +<span class="sourceLineNo">046</span> * to. This file is NOT the data file. It is a file into which we will serialize the map of<a name="line.46"></a> +<span class="sourceLineNo">047</span> * what is in the data file. For example, if you pass the following argument as<a name="line.47"></a> +<span class="sourceLineNo">048</span> * BUCKET_CACHE_IOENGINE_KEY ("hbase.bucketcache.ioengine"),<a name="line.48"></a> +<span class="sourceLineNo">049</span> * <code>file:/tmp/bucketcache.data </code>, then we will write the bucketcache data to the file<a name="line.49"></a> +<span class="sourceLineNo">050</span> * <code>/tmp/bucketcache.data</code> but the metadata on where the data is in the supplied file<a name="line.50"></a> +<span class="sourceLineNo">051</span> * is an in-memory map that needs to be persisted across restarts. Where to store this<a name="line.51"></a> +<span class="sourceLineNo">052</span> * in-memory state is what you supply here: e.g. <code>/tmp/bucketcache.map</code>.<a name="line.52"></a> +<span class="sourceLineNo">053</span> */<a name="line.53"></a> +<span class="sourceLineNo">054</span> public static final String BUCKET_CACHE_PERSISTENT_PATH_KEY = "hbase.bucketcache.persistent.path";<a name="line.54"></a> +<span class="sourceLineNo">055</span><a name="line.55"></a> +<span class="sourceLineNo">056</span> public static final String BUCKET_CACHE_WRITER_THREADS_KEY = "hbase.bucketcache.writer.threads";<a name="line.56"></a> +<span class="sourceLineNo">057</span><a name="line.57"></a> +<span class="sourceLineNo">058</span> public static final String BUCKET_CACHE_WRITER_QUEUE_KEY = "hbase.bucketcache.writer.queuelength";<a name="line.58"></a> +<span class="sourceLineNo">059</span><a name="line.59"></a> +<span class="sourceLineNo">060</span> /**<a name="line.60"></a> +<span class="sourceLineNo">061</span> * A comma-delimited array of values for use as bucket sizes.<a name="line.61"></a> +<span class="sourceLineNo">062</span> */<a name="line.62"></a> +<span class="sourceLineNo">063</span> public static final String BUCKET_CACHE_BUCKETS_KEY = "hbase.bucketcache.bucket.sizes";<a name="line.63"></a> +<span class="sourceLineNo">064</span><a name="line.64"></a> +<span class="sourceLineNo">065</span> /**<a name="line.65"></a> +<span class="sourceLineNo">066</span> * Defaults for Bucket cache<a name="line.66"></a> +<span class="sourceLineNo">067</span> */<a name="line.67"></a> +<span class="sourceLineNo">068</span> public static final int DEFAULT_BUCKET_CACHE_WRITER_THREADS = 3;<a name="line.68"></a> +<span class="sourceLineNo">069</span> public static final int DEFAULT_BUCKET_CACHE_WRITER_QUEUE = 64;<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> * The target block size used by blockcache instances. Defaults to<a name="line.72"></a> +<span class="sourceLineNo">073</span> * {@link HConstants#DEFAULT_BLOCKSIZE}.<a name="line.73"></a> +<span class="sourceLineNo">074</span> * TODO: this config point is completely wrong, as it's used to determine the<a name="line.74"></a> +<span class="sourceLineNo">075</span> * target block size of BlockCache instances. Rename.<a name="line.75"></a> +<span class="sourceLineNo">076</span> */<a name="line.76"></a> +<span class="sourceLineNo">077</span> public static final String BLOCKCACHE_BLOCKSIZE_KEY = "hbase.offheapcache.minblocksize";<a name="line.77"></a> +<span class="sourceLineNo">078</span><a name="line.78"></a> +<span class="sourceLineNo">079</span> private static final String EXTERNAL_BLOCKCACHE_KEY = "hbase.blockcache.use.external";<a name="line.79"></a> +<span class="sourceLineNo">080</span> private static final boolean EXTERNAL_BLOCKCACHE_DEFAULT = false;<a name="line.80"></a> +<span class="sourceLineNo">081</span><a name="line.81"></a> +<span class="sourceLineNo">082</span> private static final String EXTERNAL_BLOCKCACHE_CLASS_KEY = "hbase.blockcache.external.class";<a name="line.82"></a> +<span class="sourceLineNo">083</span><a name="line.83"></a> +<span class="sourceLineNo">084</span> private BlockCacheFactory() {<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> public static BlockCache createBlockCache(Configuration conf) {<a name="line.87"></a> +<span class="sourceLineNo">088</span> LruBlockCache onHeapCache = createOnHeapCache(conf);<a name="line.88"></a> +<span class="sourceLineNo">089</span> if (onHeapCache == null) {<a name="line.89"></a> +<span class="sourceLineNo">090</span> return null;<a name="line.90"></a> +<span class="sourceLineNo">091</span> }<a name="line.91"></a> +<span class="sourceLineNo">092</span> boolean useExternal = conf.getBoolean(EXTERNAL_BLOCKCACHE_KEY, EXTERNAL_BLOCKCACHE_DEFAULT);<a name="line.92"></a> +<span class="sourceLineNo">093</span> if (useExternal) {<a name="line.93"></a> +<span class="sourceLineNo">094</span> BlockCache l2CacheInstance = createExternalBlockcache(conf);<a name="line.94"></a> +<span class="sourceLineNo">095</span> return l2CacheInstance == null ?<a name="line.95"></a> +<span class="sourceLineNo">096</span> onHeapCache :<a name="line.96"></a> +<span class="sourceLineNo">097</span> new InclusiveCombinedBlockCache(onHeapCache, l2CacheInstance);<a name="line.97"></a> +<span class="sourceLineNo">098</span> } else {<a name="line.98"></a> +<span class="sourceLineNo">099</span> // otherwise use the bucket cache.<a name="line.99"></a> +<span class="sourceLineNo">100</span> BucketCache bucketCache = createBucketCache(conf);<a name="line.100"></a> +<span class="sourceLineNo">101</span> if (!conf.getBoolean("hbase.bucketcache.combinedcache.enabled", true)) {<a name="line.101"></a> +<span class="sourceLineNo">102</span> // Non combined mode is off from 2.0<a name="line.102"></a> +<span class="sourceLineNo">103</span> LOG.warn(<a name="line.103"></a> +<span class="sourceLineNo">104</span> "From HBase 2.0 onwards only combined mode of LRU cache and bucket cache is available");<a name="line.104"></a> +<span class="sourceLineNo">105</span> }<a name="line.105"></a> +<span class="sourceLineNo">106</span> return bucketCache == null ? onHeapCache : new CombinedBlockCache(onHeapCache, bucketCache);<a name="line.106"></a> +<span class="sourceLineNo">107</span> }<a name="line.107"></a> +<span class="sourceLineNo">108</span> }<a name="line.108"></a> +<span class="sourceLineNo">109</span><a name="line.109"></a> +<span class="sourceLineNo">110</span> private static LruBlockCache createOnHeapCache(final Configuration c) {<a name="line.110"></a> +<span class="sourceLineNo">111</span> final long cacheSize = MemorySizeUtil.getOnHeapCacheSize(c);<a name="line.111"></a> +<span class="sourceLineNo">112</span> if (cacheSize < 0) {<a name="line.112"></a> +<span class="sourceLineNo">113</span> return null;<a name="line.113"></a> +<span class="sourceLineNo">114</span> }<a name="line.114"></a> +<span class="sourceLineNo">115</span> int blockSize = c.getInt(BLOCKCACHE_BLOCKSIZE_KEY, HConstants.DEFAULT_BLOCKSIZE);<a name="line.115"></a> +<span class="sourceLineNo">116</span> LOG.info(<a name="line.116"></a> +<span class="sourceLineNo">117</span> "Allocating onheap LruBlockCache size=" + StringUtils.byteDesc(cacheSize) + ", blockSize="<a name="line.117"></a> +<span class="sourceLineNo">118</span> + StringUtils.byteDesc(blockSize));<a name="line.118"></a> +<span class="sourceLineNo">119</span> return new LruBlockCache(cacheSize, blockSize, true, c);<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> * Enum of all built in external block caches.<a name="line.123"></a> +<span class="sourceLineNo">124</span> * This is used for config.<a name="line.124"></a> +<span class="sourceLineNo">125</span> */<a name="line.125"></a> +<span class="sourceLineNo">126</span> private static enum ExternalBlockCaches {<a name="line.126"></a> +<span class="sourceLineNo">127</span> memcached("org.apache.hadoop.hbase.io.hfile.MemcachedBlockCache");<a name="line.127"></a> +<span class="sourceLineNo">128</span> // TODO(eclark): Consider more. Redis, etc.<a name="line.128"></a> +<span class="sourceLineNo">129</span> Class<? extends BlockCache> clazz;<a name="line.129"></a> +<span class="sourceLineNo">130</span> ExternalBlockCaches(String clazzName) {<a name="line.130"></a> +<span class="sourceLineNo">131</span> try {<a name="line.131"></a> +<span class="sourceLineNo">132</span> clazz = (Class<? extends BlockCache>) Class.forName(clazzName);<a name="line.132"></a> +<span class="sourceLineNo">133</span> } catch (ClassNotFoundException cnef) {<a name="line.133"></a> +<span class="sourceLineNo">134</span> clazz = null;<a name="line.134"></a> +<span class="sourceLineNo">135</span> }<a name="line.135"></a> +<span class="sourceLineNo">136</span> }<a name="line.136"></a> +<span class="sourceLineNo">137</span> ExternalBlockCaches(Class<? extends BlockCache> clazz) {<a name="line.137"></a> +<span class="sourceLineNo">138</span> this.clazz = clazz;<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><a name="line.141"></a> +<span class="sourceLineNo">142</span> private static BlockCache createExternalBlockcache(Configuration c) {<a name="line.142"></a> +<span class="sourceLineNo">143</span> if (LOG.isDebugEnabled()) {<a name="line.143"></a> +<span class="sourceLineNo">144</span> LOG.debug("Trying to use External l2 cache");<a name="line.144"></a> +<span class="sourceLineNo">145</span> }<a name="line.145"></a> +<span class="sourceLineNo">146</span> Class klass = null;<a name="line.146"></a> +<span class="sourceLineNo">147</span><a name="line.147"></a> +<span class="sourceLineNo">148</span> // Get the class, from the config. s<a name="line.148"></a> +<span class="sourceLineNo">149</span> try {<a name="line.149"></a> +<span class="sourceLineNo">150</span> klass = ExternalBlockCaches<a name="line.150"></a> +<span class="sourceLineNo">151</span> .valueOf(c.get(EXTERNAL_BLOCKCACHE_CLASS_KEY, "memcache")).clazz;<a name="line.151"></a> +<span class="sourceLineNo">152</span> } catch (IllegalArgumentException exception) {<a name="line.152"></a> +<span class="sourceLineNo">153</span> try {<a name="line.153"></a> +<span class="sourceLineNo">154</span> klass = c.getClass(EXTERNAL_BLOCKCACHE_CLASS_KEY, Class.forName(<a name="line.154"></a> +<span class="sourceLineNo">155</span> "org.apache.hadoop.hbase.io.hfile.MemcachedBlockCache"));<a name="line.155"></a> +<span class="sourceLineNo">156</span> } catch (ClassNotFoundException e) {<a name="line.156"></a> +<span class="sourceLineNo">157</span> return null;<a name="line.157"></a> +<span class="sourceLineNo">158</span> }<a name="line.158"></a> +<span class="sourceLineNo">159</span> }<a name="line.159"></a> +<span class="sourceLineNo">160</span><a name="line.160"></a> +<span class="sourceLineNo">161</span> // Now try and create an instance of the block cache.<a name="line.161"></a> +<span class="sourceLineNo">162</span> try {<a name="line.162"></a> +<span class="sourceLineNo">163</span> LOG.info("Creating external block cache of type: " + klass);<a name="line.163"></a> +<span class="sourceLineNo">164</span> return (BlockCache) ReflectionUtils.newInstance(klass, c);<a name="line.164"></a> +<span class="sourceLineNo">165</span> } catch (Exception e) {<a name="line.165"></a> +<span class="sourceLineNo">166</span> LOG.warn("Error creating external block cache", e);<a name="line.166"></a> +<span class="sourceLineNo">167</span> }<a name="line.167"></a> +<span class="sourceLineNo">168</span> return null;<a name="line.168"></a> +<span class="sourceLineNo">169</span><a name="line.169"></a> +<span class="sourceLineNo">170</span> }<a name="line.170"></a> +<span class="sourceLineNo">171</span><a name="line.171"></a> +<span class="sourceLineNo">172</span> private static BucketCache createBucketCache(Configuration c) {<a name="line.172"></a> +<span class="sourceLineNo">173</span> // Check for L2. ioengine name must be non-null.<a name="line.173"></a> +<span class="sourceLineNo">174</span> String bucketCacheIOEngineName = c.get(BUCKET_CACHE_IOENGINE_KEY, null);<a name="line.174"></a> +<span class="sourceLineNo">175</span> if (bucketCacheIOEngineName == null || bucketCacheIOEngineName.length() <= 0) {<a name="line.175"></a> +<span class="sourceLineNo">176</span> return null;<a name="line.176"></a> +<span class="sourceLineNo">177</span> }<a name="line.177"></a> +<span class="sourceLineNo">178</span><a name="line.178"></a> +<span class="sourceLineNo">179</span> int blockSize = c.getInt(BLOCKCACHE_BLOCKSIZE_KEY, HConstants.DEFAULT_BLOCKSIZE);<a name="line.179"></a> +<span class="sourceLineNo">180</span> final long bucketCacheSize = MemorySizeUtil.getBucketCacheSize(c);<a name="line.180"></a> +<span class="sourceLineNo">181</span> if (bucketCacheSize <= 0) {<a name="line.181"></a> +<span class="sourceLineNo">182</span> throw new IllegalStateException("bucketCacheSize <= 0; Check " +<a name="line.182"></a> +<span class="sourceLineNo">183</span> BUCKET_CACHE_SIZE_KEY + " setting and/or server java heap size");<a name="line.183"></a> +<span class="sourceLineNo">184</span> }<a name="line.184"></a> +<span class="sourceLineNo">185</span> if (c.get("hbase.bucketcache.percentage.in.combinedcache") != null) {<a name="line.185"></a> +<span class="sourceLineNo">186</span> LOG.warn("Configuration 'hbase.bucketcache.percentage.in.combinedcache' is no longer "<a name="line.186"></a> +<span class="sourceLineNo">187</span> + "respected. See comments in http://hbase.apache.org/book.html#_changes_of_note";);<a name="line.187"></a> +<span class="sourceLineNo">188</span> }<a name="line.188"></a> +<span class="sourceLineNo">189</span> int writerThreads = c.getInt(BUCKET_CACHE_WRITER_THREADS_KEY,<a name="line.189"></a> +<span class="sourceLineNo">190</span> DEFAULT_BUCKET_CACHE_WRITER_THREADS);<a name="line.190"></a> +<span class="sourceLineNo">191</span> int writerQueueLen = c.getInt(BUCKET_CACHE_WRITER_QUEUE_KEY,<a name="line.191"></a> +<span class="sourceLineNo">192</span> DEFAULT_BUCKET_CACHE_WRITER_QUEUE);<a name="line.192"></a> +<span class="sourceLineNo">193</span> String persistentPath = c.get(BUCKET_CACHE_PERSISTENT_PATH_KEY);<a name="line.193"></a> +<span class="sourceLineNo">194</span> String[] configuredBucketSizes = c.getStrings(BUCKET_CACHE_BUCKETS_KEY);<a name="line.194"></a> +<span class="sourceLineNo">195</span> int [] bucketSizes = null;<a name="line.195"></a> +<span class="sourceLineNo">196</span> if (configuredBucketSizes != null) {<a name="line.196"></a> +<span class="sourceLineNo">197</span> bucketSizes = new int[configuredBucketSizes.length];<a name="line.197"></a> +<span class="sourceLineNo">198</span> for (int i = 0; i < configuredBucketSizes.length; i++) {<a name="line.198"></a> +<span class="sourceLineNo">199</span> int bucketSize = Integer.parseInt(configuredBucketSizes[i].trim());<a name="line.199"></a> +<span class="sourceLineNo">200</span> if (bucketSize % 256 != 0) {<a name="line.200"></a> +<span class="sourceLineNo">201</span> // We need all the bucket sizes to be multiples of 256. Having all the configured bucket<a name="line.201"></a> +<span class="sourceLineNo">202</span> // sizes to be multiples of 256 will ensure that the block offsets within buckets,<a name="line.202"></a> +<span class="sourceLineNo">203</span> // that are calculated, will also be multiples of 256.<a name="line.203"></a> +<span class="sourceLineNo">204</span> // See BucketEntry where offset to each block is represented using 5 bytes (instead of 8<a name="line.204"></a> +<span class="sourceLineNo">205</span> // bytes long). We would like to save heap overhead as less as possible.<a name="line.205"></a> +<span class="sourceLineNo">206</span> throw new IllegalArgumentException("Illegal value: " + bucketSize + " configured for '"<a name="line.206"></a> +<span class="sourceLineNo">207</span> + BUCKET_CACHE_BUCKETS_KEY + "'. All bucket sizes to be multiples of 256");<a name="line.207"></a> +<span class="sourceLineNo">208</span> }<a name="line.208"></a> +<span class="sourceLineNo">209</span> bucketSizes[i] = bucketSize;<a name="line.209"></a> +<span class="sourceLineNo">210</span> }<a name="line.210"></a> +<span class="sourceLineNo">211</span> }<a name="line.211"></a> +<span class="sourceLineNo">212</span> BucketCache bucketCache = null;<a name="line.212"></a> +<span class="sourceLineNo">213</span> try {<a name="line.213"></a> +<span class="sourceLineNo">214</span> int ioErrorsTolerationDuration = c.getInt(<a name="line.214"></a> +<span class="sourceLineNo">215</span> "hbase.bucketcache.ioengine.errors.tolerated.duration",<a name="line.215"></a> +<span class="sourceLineNo">216</span> BucketCache.DEFAULT_ERROR_TOLERATION_DURATION);<a name="line.216"></a> +<span class="sourceLineNo">217</span> // Bucket cache logs its stats on creation internal to the constructor.<a name="line.217"></a> +<span class="sourceLineNo">218</span> bucketCache = new BucketCache(bucketCacheIOEngineName,<a name="line.218"></a> +<span class="sourceLineNo">219</span> bucketCacheSize, blockSize, bucketSizes, writerThreads, writerQueueLen, persistentPath,<a name="line.219"></a> +<span class="sourceLineNo">220</span> ioErrorsTolerationDuration, c);<a name="line.220"></a> +<span class="sourceLineNo">221</span> } catch (IOException ioex) {<a name="line.221"></a> +<span class="sourceLineNo">222</span> LOG.error("Can't instantiate bucket cache", ioex); throw new RuntimeException(ioex);<a name="line.222"></a> +<span class="sourceLineNo">223</span> }<a name="line.223"></a> +<span class="sourceLineNo">224</span> return bucketCache;<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> + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + +</pre> +</div> +</body> +</html> http://git-wip-us.apache.org/repos/asf/hbase-site/blob/4f8b8424/devapidocs/src-html/org/apache/hadoop/hbase/io/hfile/BlockCacheFactory.html ---------------------------------------------------------------------- diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/io/hfile/BlockCacheFactory.html b/devapidocs/src-html/org/apache/hadoop/hbase/io/hfile/BlockCacheFactory.html new file mode 100644 index 0000000..2a70085 --- /dev/null +++ b/devapidocs/src-html/org/apache/hadoop/hbase/io/hfile/BlockCacheFactory.html @@ -0,0 +1,298 @@ +<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd";> +<html lang="en"> +<head> +<title>Source code</title> +<link rel="stylesheet" type="text/css" href="../../../../../../../stylesheet.css" title="Style"> +</head> +<body> +<div class="sourceContainer"> +<pre><span class="sourceLineNo">001</span>/**<a name="line.1"></a> +<span class="sourceLineNo">002</span> * Licensed to the Apache Software Foundation (ASF) under one<a name="line.2"></a> +<span class="sourceLineNo">003</span> * or more contributor license agreements. See the NOTICE file<a name="line.3"></a> +<span class="sourceLineNo">004</span> * distributed with this work for additional information<a name="line.4"></a> +<span class="sourceLineNo">005</span> * regarding copyright ownership. The ASF licenses this file<a name="line.5"></a> +<span class="sourceLineNo">006</span> * to you under the Apache License, Version 2.0 (the<a name="line.6"></a> +<span class="sourceLineNo">007</span> * "License"); you may not use this file except in compliance<a name="line.7"></a> +<span class="sourceLineNo">008</span> * with the License. You may obtain a copy of the License at<a name="line.8"></a> +<span class="sourceLineNo">009</span> *<a name="line.9"></a> +<span class="sourceLineNo">010</span> * http://www.apache.org/licenses/LICENSE-2.0<a name="line.10"></a> +<span class="sourceLineNo">011</span> *<a name="line.11"></a> +<span class="sourceLineNo">012</span> * Unless required by applicable law or agreed to in writing, software<a name="line.12"></a> +<span class="sourceLineNo">013</span> * distributed under the License is distributed on an "AS IS" BASIS,<a name="line.13"></a> +<span class="sourceLineNo">014</span> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<a name="line.14"></a> +<span class="sourceLineNo">015</span> * See the License for the specific language governing permissions and<a name="line.15"></a> +<span class="sourceLineNo">016</span> * limitations under the License.<a name="line.16"></a> +<span class="sourceLineNo">017</span> */<a name="line.17"></a> +<span class="sourceLineNo">018</span>package org.apache.hadoop.hbase.io.hfile;<a name="line.18"></a> +<span class="sourceLineNo">019</span><a name="line.19"></a> +<span class="sourceLineNo">020</span>import static org.apache.hadoop.hbase.HConstants.BUCKET_CACHE_IOENGINE_KEY;<a name="line.20"></a> +<span class="sourceLineNo">021</span>import static org.apache.hadoop.hbase.HConstants.BUCKET_CACHE_SIZE_KEY;<a name="line.21"></a> +<span class="sourceLineNo">022</span><a name="line.22"></a> +<span class="sourceLineNo">023</span>import java.io.IOException;<a name="line.23"></a> +<span class="sourceLineNo">024</span><a name="line.24"></a> +<span class="sourceLineNo">025</span>import org.apache.hadoop.conf.Configuration;<a name="line.25"></a> +<span class="sourceLineNo">026</span>import org.apache.hadoop.hbase.HConstants;<a name="line.26"></a> +<span class="sourceLineNo">027</span>import org.apache.hadoop.hbase.io.hfile.bucket.BucketCache;<a name="line.27"></a> +<span class="sourceLineNo">028</span>import org.apache.hadoop.hbase.io.util.MemorySizeUtil;<a name="line.28"></a> +<span class="sourceLineNo">029</span>import org.apache.hadoop.hbase.util.ReflectionUtils;<a name="line.29"></a> +<span class="sourceLineNo">030</span>import org.apache.hadoop.util.StringUtils;<a name="line.30"></a> +<span class="sourceLineNo">031</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.31"></a> +<span class="sourceLineNo">032</span>import org.slf4j.Logger;<a name="line.32"></a> +<span class="sourceLineNo">033</span>import org.slf4j.LoggerFactory;<a name="line.33"></a> +<span class="sourceLineNo">034</span><a name="line.34"></a> +<span class="sourceLineNo">035</span>@InterfaceAudience.Private<a name="line.35"></a> +<span class="sourceLineNo">036</span>public final class BlockCacheFactory {<a name="line.36"></a> +<span class="sourceLineNo">037</span><a name="line.37"></a> +<span class="sourceLineNo">038</span> private static final Logger LOG = LoggerFactory.getLogger(BlockCacheFactory.class.getName());<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> * Configuration keys for Bucket cache<a name="line.41"></a> +<span class="sourceLineNo">042</span> */<a name="line.42"></a> +<span class="sourceLineNo">043</span><a name="line.43"></a> +<span class="sourceLineNo">044</span> /**<a name="line.44"></a> +<span class="sourceLineNo">045</span> * If the chosen ioengine can persist its state across restarts, the path to the file to persist<a name="line.45"></a> +<span class="sourceLineNo">046</span> * to. This file is NOT the data file. It is a file into which we will serialize the map of<a name="line.46"></a> +<span class="sourceLineNo">047</span> * what is in the data file. For example, if you pass the following argument as<a name="line.47"></a> +<span class="sourceLineNo">048</span> * BUCKET_CACHE_IOENGINE_KEY ("hbase.bucketcache.ioengine"),<a name="line.48"></a> +<span class="sourceLineNo">049</span> * <code>file:/tmp/bucketcache.data </code>, then we will write the bucketcache data to the file<a name="line.49"></a> +<span class="sourceLineNo">050</span> * <code>/tmp/bucketcache.data</code> but the metadata on where the data is in the supplied file<a name="line.50"></a> +<span class="sourceLineNo">051</span> * is an in-memory map that needs to be persisted across restarts. Where to store this<a name="line.51"></a> +<span class="sourceLineNo">052</span> * in-memory state is what you supply here: e.g. <code>/tmp/bucketcache.map</code>.<a name="line.52"></a> +<span class="sourceLineNo">053</span> */<a name="line.53"></a> +<span class="sourceLineNo">054</span> public static final String BUCKET_CACHE_PERSISTENT_PATH_KEY = "hbase.bucketcache.persistent.path";<a name="line.54"></a> +<span class="sourceLineNo">055</span><a name="line.55"></a> +<span class="sourceLineNo">056</span> public static final String BUCKET_CACHE_WRITER_THREADS_KEY = "hbase.bucketcache.writer.threads";<a name="line.56"></a> +<span class="sourceLineNo">057</span><a name="line.57"></a> +<span class="sourceLineNo">058</span> public static final String BUCKET_CACHE_WRITER_QUEUE_KEY = "hbase.bucketcache.writer.queuelength";<a name="line.58"></a> +<span class="sourceLineNo">059</span><a name="line.59"></a> +<span class="sourceLineNo">060</span> /**<a name="line.60"></a> +<span class="sourceLineNo">061</span> * A comma-delimited array of values for use as bucket sizes.<a name="line.61"></a> +<span class="sourceLineNo">062</span> */<a name="line.62"></a> +<span class="sourceLineNo">063</span> public static final String BUCKET_CACHE_BUCKETS_KEY = "hbase.bucketcache.bucket.sizes";<a name="line.63"></a> +<span class="sourceLineNo">064</span><a name="line.64"></a> +<span class="sourceLineNo">065</span> /**<a name="line.65"></a> +<span class="sourceLineNo">066</span> * Defaults for Bucket cache<a name="line.66"></a> +<span class="sourceLineNo">067</span> */<a name="line.67"></a> +<span class="sourceLineNo">068</span> public static final int DEFAULT_BUCKET_CACHE_WRITER_THREADS = 3;<a name="line.68"></a> +<span class="sourceLineNo">069</span> public static final int DEFAULT_BUCKET_CACHE_WRITER_QUEUE = 64;<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> * The target block size used by blockcache instances. Defaults to<a name="line.72"></a> +<span class="sourceLineNo">073</span> * {@link HConstants#DEFAULT_BLOCKSIZE}.<a name="line.73"></a> +<span class="sourceLineNo">074</span> * TODO: this config point is completely wrong, as it's used to determine the<a name="line.74"></a> +<span class="sourceLineNo">075</span> * target block size of BlockCache instances. Rename.<a name="line.75"></a> +<span class="sourceLineNo">076</span> */<a name="line.76"></a> +<span class="sourceLineNo">077</span> public static final String BLOCKCACHE_BLOCKSIZE_KEY = "hbase.offheapcache.minblocksize";<a name="line.77"></a> +<span class="sourceLineNo">078</span><a name="line.78"></a> +<span class="sourceLineNo">079</span> private static final String EXTERNAL_BLOCKCACHE_KEY = "hbase.blockcache.use.external";<a name="line.79"></a> +<span class="sourceLineNo">080</span> private static final boolean EXTERNAL_BLOCKCACHE_DEFAULT = false;<a name="line.80"></a> +<span class="sourceLineNo">081</span><a name="line.81"></a> +<span class="sourceLineNo">082</span> private static final String EXTERNAL_BLOCKCACHE_CLASS_KEY = "hbase.blockcache.external.class";<a name="line.82"></a> +<span class="sourceLineNo">083</span><a name="line.83"></a> +<span class="sourceLineNo">084</span> private BlockCacheFactory() {<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> public static BlockCache createBlockCache(Configuration conf) {<a name="line.87"></a> +<span class="sourceLineNo">088</span> LruBlockCache onHeapCache = createOnHeapCache(conf);<a name="line.88"></a> +<span class="sourceLineNo">089</span> if (onHeapCache == null) {<a name="line.89"></a> +<span class="sourceLineNo">090</span> return null;<a name="line.90"></a> +<span class="sourceLineNo">091</span> }<a name="line.91"></a> +<span class="sourceLineNo">092</span> boolean useExternal = conf.getBoolean(EXTERNAL_BLOCKCACHE_KEY, EXTERNAL_BLOCKCACHE_DEFAULT);<a name="line.92"></a> +<span class="sourceLineNo">093</span> if (useExternal) {<a name="line.93"></a> +<span class="sourceLineNo">094</span> BlockCache l2CacheInstance = createExternalBlockcache(conf);<a name="line.94"></a> +<span class="sourceLineNo">095</span> return l2CacheInstance == null ?<a name="line.95"></a> +<span class="sourceLineNo">096</span> onHeapCache :<a name="line.96"></a> +<span class="sourceLineNo">097</span> new InclusiveCombinedBlockCache(onHeapCache, l2CacheInstance);<a name="line.97"></a> +<span class="sourceLineNo">098</span> } else {<a name="line.98"></a> +<span class="sourceLineNo">099</span> // otherwise use the bucket cache.<a name="line.99"></a> +<span class="sourceLineNo">100</span> BucketCache bucketCache = createBucketCache(conf);<a name="line.100"></a> +<span class="sourceLineNo">101</span> if (!conf.getBoolean("hbase.bucketcache.combinedcache.enabled", true)) {<a name="line.101"></a> +<span class="sourceLineNo">102</span> // Non combined mode is off from 2.0<a name="line.102"></a> +<span class="sourceLineNo">103</span> LOG.warn(<a name="line.103"></a> +<span class="sourceLineNo">104</span> "From HBase 2.0 onwards only combined mode of LRU cache and bucket cache is available");<a name="line.104"></a> +<span class="sourceLineNo">105</span> }<a name="line.105"></a> +<span class="sourceLineNo">106</span> return bucketCache == null ? onHeapCache : new CombinedBlockCache(onHeapCache, bucketCache);<a name="line.106"></a> +<span class="sourceLineNo">107</span> }<a name="line.107"></a> +<span class="sourceLineNo">108</span> }<a name="line.108"></a> +<span class="sourceLineNo">109</span><a name="line.109"></a> +<span class="sourceLineNo">110</span> private static LruBlockCache createOnHeapCache(final Configuration c) {<a name="line.110"></a> +<span class="sourceLineNo">111</span> final long cacheSize = MemorySizeUtil.getOnHeapCacheSize(c);<a name="line.111"></a> +<span class="sourceLineNo">112</span> if (cacheSize < 0) {<a name="line.112"></a> +<span class="sourceLineNo">113</span> return null;<a name="line.113"></a> +<span class="sourceLineNo">114</span> }<a name="line.114"></a> +<span class="sourceLineNo">115</span> int blockSize = c.getInt(BLOCKCACHE_BLOCKSIZE_KEY, HConstants.DEFAULT_BLOCKSIZE);<a name="line.115"></a> +<span class="sourceLineNo">116</span> LOG.info(<a name="line.116"></a> +<span class="sourceLineNo">117</span> "Allocating onheap LruBlockCache size=" + StringUtils.byteDesc(cacheSize) + ", blockSize="<a name="line.117"></a> +<span class="sourceLineNo">118</span> + StringUtils.byteDesc(blockSize));<a name="line.118"></a> +<span class="sourceLineNo">119</span> return new LruBlockCache(cacheSize, blockSize, true, c);<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> * Enum of all built in external block caches.<a name="line.123"></a> +<span class="sourceLineNo">124</span> * This is used for config.<a name="line.124"></a> +<span class="sourceLineNo">125</span> */<a name="line.125"></a> +<span class="sourceLineNo">126</span> private static enum ExternalBlockCaches {<a name="line.126"></a> +<span class="sourceLineNo">127</span> memcached("org.apache.hadoop.hbase.io.hfile.MemcachedBlockCache");<a name="line.127"></a> +<span class="sourceLineNo">128</span> // TODO(eclark): Consider more. Redis, etc.<a name="line.128"></a> +<span class="sourceLineNo">129</span> Class<? extends BlockCache> clazz;<a name="line.129"></a> +<span class="sourceLineNo">130</span> ExternalBlockCaches(String clazzName) {<a name="line.130"></a> +<span class="sourceLineNo">131</span> try {<a name="line.131"></a> +<span class="sourceLineNo">132</span> clazz = (Class<? extends BlockCache>) Class.forName(clazzName);<a name="line.132"></a> +<span class="sourceLineNo">133</span> } catch (ClassNotFoundException cnef) {<a name="line.133"></a> +<span class="sourceLineNo">134</span> clazz = null;<a name="line.134"></a> +<span class="sourceLineNo">135</span> }<a name="line.135"></a> +<span class="sourceLineNo">136</span> }<a name="line.136"></a> +<span class="sourceLineNo">137</span> ExternalBlockCaches(Class<? extends BlockCache> clazz) {<a name="line.137"></a> +<span class="sourceLineNo">138</span> this.clazz = clazz;<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><a name="line.141"></a> +<span class="sourceLineNo">142</span> private static BlockCache createExternalBlockcache(Configuration c) {<a name="line.142"></a> +<span class="sourceLineNo">143</span> if (LOG.isDebugEnabled()) {<a name="line.143"></a> +<span class="sourceLineNo">144</span> LOG.debug("Trying to use External l2 cache");<a name="line.144"></a> +<span class="sourceLineNo">145</span> }<a name="line.145"></a> +<span class="sourceLineNo">146</span> Class klass = null;<a name="line.146"></a> +<span class="sourceLineNo">147</span><a name="line.147"></a> +<span class="sourceLineNo">148</span> // Get the class, from the config. s<a name="line.148"></a> +<span class="sourceLineNo">149</span> try {<a name="line.149"></a> +<span class="sourceLineNo">150</span> klass = ExternalBlockCaches<a name="line.150"></a> +<span class="sourceLineNo">151</span> .valueOf(c.get(EXTERNAL_BLOCKCACHE_CLASS_KEY, "memcache")).clazz;<a name="line.151"></a> +<span class="sourceLineNo">152</span> } catch (IllegalArgumentException exception) {<a name="line.152"></a> +<span class="sourceLineNo">153</span> try {<a name="line.153"></a> +<span class="sourceLineNo">154</span> klass = c.getClass(EXTERNAL_BLOCKCACHE_CLASS_KEY, Class.forName(<a name="line.154"></a> +<span class="sourceLineNo">155</span> "org.apache.hadoop.hbase.io.hfile.MemcachedBlockCache"));<a name="line.155"></a> +<span class="sourceLineNo">156</span> } catch (ClassNotFoundException e) {<a name="line.156"></a> +<span class="sourceLineNo">157</span> return null;<a name="line.157"></a> +<span class="sourceLineNo">158</span> }<a name="line.158"></a> +<span class="sourceLineNo">159</span> }<a name="line.159"></a> +<span class="sourceLineNo">160</span><a name="line.160"></a> +<span class="sourceLineNo">161</span> // Now try and create an instance of the block cache.<a name="line.161"></a> +<span class="sourceLineNo">162</span> try {<a name="line.162"></a> +<span class="sourceLineNo">163</span> LOG.info("Creating external block cache of type: " + klass);<a name="line.163"></a> +<span class="sourceLineNo">164</span> return (BlockCache) ReflectionUtils.newInstance(klass, c);<a name="line.164"></a> +<span class="sourceLineNo">165</span> } catch (Exception e) {<a name="line.165"></a> +<span class="sourceLineNo">166</span> LOG.warn("Error creating external block cache", e);<a name="line.166"></a> +<span class="sourceLineNo">167</span> }<a name="line.167"></a> +<span class="sourceLineNo">168</span> return null;<a name="line.168"></a> +<span class="sourceLineNo">169</span><a name="line.169"></a> +<span class="sourceLineNo">170</span> }<a name="line.170"></a> +<span class="sourceLineNo">171</span><a name="line.171"></a> +<span class="sourceLineNo">172</span> private static BucketCache createBucketCache(Configuration c) {<a name="line.172"></a> +<span class="sourceLineNo">173</span> // Check for L2. ioengine name must be non-null.<a name="line.173"></a> +<span class="sourceLineNo">174</span> String bucketCacheIOEngineName = c.get(BUCKET_CACHE_IOENGINE_KEY, null);<a name="line.174"></a> +<span class="sourceLineNo">175</span> if (bucketCacheIOEngineName == null || bucketCacheIOEngineName.length() <= 0) {<a name="line.175"></a> +<span class="sourceLineNo">176</span> return null;<a name="line.176"></a> +<span class="sourceLineNo">177</span> }<a name="line.177"></a> +<span class="sourceLineNo">178</span><a name="line.178"></a> +<span class="sourceLineNo">179</span> int blockSize = c.getInt(BLOCKCACHE_BLOCKSIZE_KEY, HConstants.DEFAULT_BLOCKSIZE);<a name="line.179"></a> +<span class="sourceLineNo">180</span> final long bucketCacheSize = MemorySizeUtil.getBucketCacheSize(c);<a name="line.180"></a> +<span class="sourceLineNo">181</span> if (bucketCacheSize <= 0) {<a name="line.181"></a> +<span class="sourceLineNo">182</span> throw new IllegalStateException("bucketCacheSize <= 0; Check " +<a name="line.182"></a> +<span class="sourceLineNo">183</span> BUCKET_CACHE_SIZE_KEY + " setting and/or server java heap size");<a name="line.183"></a> +<span class="sourceLineNo">184</span> }<a name="line.184"></a> +<span class="sourceLineNo">185</span> if (c.get("hbase.bucketcache.percentage.in.combinedcache") != null) {<a name="line.185"></a> +<span class="sourceLineNo">186</span> LOG.warn("Configuration 'hbase.bucketcache.percentage.in.combinedcache' is no longer "<a name="line.186"></a> +<span class="sourceLineNo">187</span> + "respected. See comments in http://hbase.apache.org/book.html#_changes_of_note";);<a name="line.187"></a> +<span class="sourceLineNo">188</span> }<a name="line.188"></a> +<span class="sourceLineNo">189</span> int writerThreads = c.getInt(BUCKET_CACHE_WRITER_THREADS_KEY,<a name="line.189"></a> +<span class="sourceLineNo">190</span> DEFAULT_BUCKET_CACHE_WRITER_THREADS);<a name="line.190"></a> +<span class="sourceLineNo">191</span> int writerQueueLen = c.getInt(BUCKET_CACHE_WRITER_QUEUE_KEY,<a name="line.191"></a> +<span class="sourceLineNo">192</span> DEFAULT_BUCKET_CACHE_WRITER_QUEUE);<a name="line.192"></a> +<span class="sourceLineNo">193</span> String persistentPath = c.get(BUCKET_CACHE_PERSISTENT_PATH_KEY);<a name="line.193"></a> +<span class="sourceLineNo">194</span> String[] configuredBucketSizes = c.getStrings(BUCKET_CACHE_BUCKETS_KEY);<a name="line.194"></a> +<span class="sourceLineNo">195</span> int [] bucketSizes = null;<a name="line.195"></a> +<span class="sourceLineNo">196</span> if (configuredBucketSizes != null) {<a name="line.196"></a> +<span class="sourceLineNo">197</span> bucketSizes = new int[configuredBucketSizes.length];<a name="line.197"></a> +<span class="sourceLineNo">198</span> for (int i = 0; i < configuredBucketSizes.length; i++) {<a name="line.198"></a> +<span class="sourceLineNo">199</span> int bucketSize = Integer.parseInt(configuredBucketSizes[i].trim());<a name="line.199"></a> +<span class="sourceLineNo">200</span> if (bucketSize % 256 != 0) {<a name="line.200"></a> +<span class="sourceLineNo">201</span> // We need all the bucket sizes to be multiples of 256. Having all the configured bucket<a name="line.201"></a> +<span class="sourceLineNo">202</span> // sizes to be multiples of 256 will ensure that the block offsets within buckets,<a name="line.202"></a> +<span class="sourceLineNo">203</span> // that are calculated, will also be multiples of 256.<a name="line.203"></a> +<span class="sourceLineNo">204</span> // See BucketEntry where offset to each block is represented using 5 bytes (instead of 8<a name="line.204"></a> +<span class="sourceLineNo">205</span> // bytes long). We would like to save heap overhead as less as possible.<a name="line.205"></a> +<span class="sourceLineNo">206</span> throw new IllegalArgumentException("Illegal value: " + bucketSize + " configured for '"<a name="line.206"></a> +<span class="sourceLineNo">207</span> + BUCKET_CACHE_BUCKETS_KEY + "'. All bucket sizes to be multiples of 256");<a name="line.207"></a> +<span class="sourceLineNo">208</span> }<a name="line.208"></a> +<span class="sourceLineNo">209</span> bucketSizes[i] = bucketSize;<a name="line.209"></a> +<span class="sourceLineNo">210</span> }<a name="line.210"></a> +<span class="sourceLineNo">211</span> }<a name="line.211"></a> +<span class="sourceLineNo">212</span> BucketCache bucketCache = null;<a name="line.212"></a> +<span class="sourceLineNo">213</span> try {<a name="line.213"></a> +<span class="sourceLineNo">214</span> int ioErrorsTolerationDuration = c.getInt(<a name="line.214"></a> +<span class="sourceLineNo">215</span> "hbase.bucketcache.ioengine.errors.tolerated.duration",<a name="line.215"></a> +<span class="sourceLineNo">216</span> BucketCache.DEFAULT_ERROR_TOLERATION_DURATION);<a name="line.216"></a> +<span class="sourceLineNo">217</span> // Bucket cache logs its stats on creation internal to the constructor.<a name="line.217"></a> +<span class="sourceLineNo">218</span> bucketCache = new BucketCache(bucketCacheIOEngineName,<a name="line.218"></a> +<span class="sourceLineNo">219</span> bucketCacheSize, blockSize, bucketSizes, writerThreads, writerQueueLen, persistentPath,<a name="line.219"></a> +<span class="sourceLineNo">220</span> ioErrorsTolerationDuration, c);<a name="line.220"></a> +<span class="sourceLineNo">221</span> } catch (IOException ioex) {<a name="line.221"></a> +<span class="sourceLineNo">222</span> LOG.error("Can't instantiate bucket cache", ioex); throw new RuntimeException(ioex);<a name="line.222"></a> +<span class="sourceLineNo">223</span> }<a name="line.223"></a> +<span class="sourceLineNo">224</span> return bucketCache;<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> + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + +</pre> +</div> +</body> +</html>
