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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.io.hfile;<a name="line.19"></a> |
| <span class="sourceLineNo">020</span><a name="line.20"></a> |
| <span class="sourceLineNo">021</span>import static org.junit.Assert.assertEquals;<a name="line.21"></a> |
| <span class="sourceLineNo">022</span>import static org.junit.Assert.assertNotNull;<a name="line.22"></a> |
| <span class="sourceLineNo">023</span>import static org.junit.Assert.assertNull;<a name="line.23"></a> |
| <span class="sourceLineNo">024</span>import static org.junit.Assert.assertTrue;<a name="line.24"></a> |
| <span class="sourceLineNo">025</span><a name="line.25"></a> |
| <span class="sourceLineNo">026</span>import java.nio.ByteBuffer;<a name="line.26"></a> |
| <span class="sourceLineNo">027</span>import java.util.Random;<a name="line.27"></a> |
| <span class="sourceLineNo">028</span><a name="line.28"></a> |
| <span class="sourceLineNo">029</span>import org.apache.hadoop.hbase.HBaseClassTestRule;<a name="line.29"></a> |
| <span class="sourceLineNo">030</span>import org.apache.hadoop.hbase.io.HeapSize;<a name="line.30"></a> |
| <span class="sourceLineNo">031</span>import org.apache.hadoop.hbase.testclassification.IOTests;<a name="line.31"></a> |
| <span class="sourceLineNo">032</span>import org.apache.hadoop.hbase.testclassification.SmallTests;<a name="line.32"></a> |
| <span class="sourceLineNo">033</span>import org.apache.hadoop.hbase.util.ClassSize;<a name="line.33"></a> |
| <span class="sourceLineNo">034</span>import org.junit.ClassRule;<a name="line.34"></a> |
| <span class="sourceLineNo">035</span>import org.junit.Test;<a name="line.35"></a> |
| <span class="sourceLineNo">036</span>import org.junit.experimental.categories.Category;<a name="line.36"></a> |
| <span class="sourceLineNo">037</span><a name="line.37"></a> |
| <span class="sourceLineNo">038</span>/**<a name="line.38"></a> |
| <span class="sourceLineNo">039</span> * Tests the concurrent TinyLfuBlockCache.<a name="line.39"></a> |
| <span class="sourceLineNo">040</span> */<a name="line.40"></a> |
| <span class="sourceLineNo">041</span>@Category({IOTests.class, SmallTests.class})<a name="line.41"></a> |
| <span class="sourceLineNo">042</span>public class TestTinyLfuBlockCache {<a name="line.42"></a> |
| <span class="sourceLineNo">043</span><a name="line.43"></a> |
| <span class="sourceLineNo">044</span> @ClassRule<a name="line.44"></a> |
| <span class="sourceLineNo">045</span> public static final HBaseClassTestRule CLASS_RULE =<a name="line.45"></a> |
| <span class="sourceLineNo">046</span> HBaseClassTestRule.forClass(TestTinyLfuBlockCache.class);<a name="line.46"></a> |
| <span class="sourceLineNo">047</span><a name="line.47"></a> |
| <span class="sourceLineNo">048</span> @Test<a name="line.48"></a> |
| <span class="sourceLineNo">049</span> public void testCacheSimple() throws Exception {<a name="line.49"></a> |
| <span class="sourceLineNo">050</span><a name="line.50"></a> |
| <span class="sourceLineNo">051</span> long maxSize = 1000000;<a name="line.51"></a> |
| <span class="sourceLineNo">052</span> long blockSize = calculateBlockSizeDefault(maxSize, 101);<a name="line.52"></a> |
| <span class="sourceLineNo">053</span><a name="line.53"></a> |
| <span class="sourceLineNo">054</span> TinyLfuBlockCache cache = new TinyLfuBlockCache(maxSize, blockSize, blockSize, Runnable::run);<a name="line.54"></a> |
| <span class="sourceLineNo">055</span><a name="line.55"></a> |
| <span class="sourceLineNo">056</span> CachedItem [] blocks = generateRandomBlocks(100, blockSize);<a name="line.56"></a> |
| <span class="sourceLineNo">057</span><a name="line.57"></a> |
| <span class="sourceLineNo">058</span> long expectedCacheSize = cache.heapSize();<a name="line.58"></a> |
| <span class="sourceLineNo">059</span><a name="line.59"></a> |
| <span class="sourceLineNo">060</span> // Confirm empty<a name="line.60"></a> |
| <span class="sourceLineNo">061</span> for (CachedItem block : blocks) {<a name="line.61"></a> |
| <span class="sourceLineNo">062</span> assertTrue(cache.getBlock(block.cacheKey, true, false, true) == null);<a name="line.62"></a> |
| <span class="sourceLineNo">063</span> }<a name="line.63"></a> |
| <span class="sourceLineNo">064</span><a name="line.64"></a> |
| <span class="sourceLineNo">065</span> // Add blocks<a name="line.65"></a> |
| <span class="sourceLineNo">066</span> for (CachedItem block : blocks) {<a name="line.66"></a> |
| <span class="sourceLineNo">067</span> cache.cacheBlock(block.cacheKey, block);<a name="line.67"></a> |
| <span class="sourceLineNo">068</span> expectedCacheSize += block.heapSize();<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> // Verify correctly calculated cache heap size<a name="line.71"></a> |
| <span class="sourceLineNo">072</span> assertEquals(expectedCacheSize, cache.heapSize());<a name="line.72"></a> |
| <span class="sourceLineNo">073</span><a name="line.73"></a> |
| <span class="sourceLineNo">074</span> // Check if all blocks are properly cached and retrieved<a name="line.74"></a> |
| <span class="sourceLineNo">075</span> for (CachedItem block : blocks) {<a name="line.75"></a> |
| <span class="sourceLineNo">076</span> HeapSize buf = cache.getBlock(block.cacheKey, true, false, true);<a name="line.76"></a> |
| <span class="sourceLineNo">077</span> assertTrue(buf != null);<a name="line.77"></a> |
| <span class="sourceLineNo">078</span> assertEquals(buf.heapSize(), block.heapSize());<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> // Re-add same blocks and ensure nothing has changed<a name="line.81"></a> |
| <span class="sourceLineNo">082</span> long expectedBlockCount = cache.getBlockCount();<a name="line.82"></a> |
| <span class="sourceLineNo">083</span> for (CachedItem block : blocks) {<a name="line.83"></a> |
| <span class="sourceLineNo">084</span> cache.cacheBlock(block.cacheKey, block);<a name="line.84"></a> |
| <span class="sourceLineNo">085</span> }<a name="line.85"></a> |
| <span class="sourceLineNo">086</span> assertEquals(<a name="line.86"></a> |
| <span class="sourceLineNo">087</span> "Cache should ignore cache requests for blocks already in cache",<a name="line.87"></a> |
| <span class="sourceLineNo">088</span> expectedBlockCount, cache.getBlockCount());<a name="line.88"></a> |
| <span class="sourceLineNo">089</span><a name="line.89"></a> |
| <span class="sourceLineNo">090</span> // Verify correctly calculated cache heap size<a name="line.90"></a> |
| <span class="sourceLineNo">091</span> assertEquals(expectedCacheSize, cache.heapSize());<a name="line.91"></a> |
| <span class="sourceLineNo">092</span><a name="line.92"></a> |
| <span class="sourceLineNo">093</span> // Check if all blocks are properly cached and retrieved<a name="line.93"></a> |
| <span class="sourceLineNo">094</span> for (CachedItem block : blocks) {<a name="line.94"></a> |
| <span class="sourceLineNo">095</span> HeapSize buf = cache.getBlock(block.cacheKey, true, false, true);<a name="line.95"></a> |
| <span class="sourceLineNo">096</span> assertTrue(buf != null);<a name="line.96"></a> |
| <span class="sourceLineNo">097</span> assertEquals(buf.heapSize(), block.heapSize());<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> // Expect no evictions<a name="line.100"></a> |
| <span class="sourceLineNo">101</span> assertEquals(0, cache.getStats().getEvictionCount());<a name="line.101"></a> |
| <span class="sourceLineNo">102</span> }<a name="line.102"></a> |
| <span class="sourceLineNo">103</span><a name="line.103"></a> |
| <span class="sourceLineNo">104</span> @Test<a name="line.104"></a> |
| <span class="sourceLineNo">105</span> public void testCacheEvictionSimple() throws Exception {<a name="line.105"></a> |
| <span class="sourceLineNo">106</span><a name="line.106"></a> |
| <span class="sourceLineNo">107</span> long maxSize = 100000;<a name="line.107"></a> |
| <span class="sourceLineNo">108</span> long blockSize = calculateBlockSizeDefault(maxSize, 10);<a name="line.108"></a> |
| <span class="sourceLineNo">109</span><a name="line.109"></a> |
| <span class="sourceLineNo">110</span> TinyLfuBlockCache cache = new TinyLfuBlockCache(maxSize, blockSize, blockSize, Runnable::run);<a name="line.110"></a> |
| <span class="sourceLineNo">111</span><a name="line.111"></a> |
| <span class="sourceLineNo">112</span> CachedItem [] blocks = generateFixedBlocks(11, blockSize, "block");<a name="line.112"></a> |
| <span class="sourceLineNo">113</span><a name="line.113"></a> |
| <span class="sourceLineNo">114</span> // Add all the blocks<a name="line.114"></a> |
| <span class="sourceLineNo">115</span> for (CachedItem block : blocks) {<a name="line.115"></a> |
| <span class="sourceLineNo">116</span> cache.cacheBlock(block.cacheKey, block);<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 single eviction run should have occurred<a name="line.119"></a> |
| <span class="sourceLineNo">120</span> assertEquals(1, cache.getStats().getEvictionCount());<a name="line.120"></a> |
| <span class="sourceLineNo">121</span><a name="line.121"></a> |
| <span class="sourceLineNo">122</span> // The cache did not grow beyond max<a name="line.122"></a> |
| <span class="sourceLineNo">123</span> assertTrue(cache.heapSize() < maxSize);<a name="line.123"></a> |
| <span class="sourceLineNo">124</span><a name="line.124"></a> |
| <span class="sourceLineNo">125</span> // All blocks except one should be in the cache<a name="line.125"></a> |
| <span class="sourceLineNo">126</span> assertEquals(10, cache.getBlockCount());<a name="line.126"></a> |
| <span class="sourceLineNo">127</span> }<a name="line.127"></a> |
| <span class="sourceLineNo">128</span><a name="line.128"></a> |
| <span class="sourceLineNo">129</span> @Test<a name="line.129"></a> |
| <span class="sourceLineNo">130</span> public void testScanResistance() throws Exception {<a name="line.130"></a> |
| <span class="sourceLineNo">131</span><a name="line.131"></a> |
| <span class="sourceLineNo">132</span> long maxSize = 100000;<a name="line.132"></a> |
| <span class="sourceLineNo">133</span> long blockSize = calculateBlockSize(maxSize, 10);<a name="line.133"></a> |
| <span class="sourceLineNo">134</span><a name="line.134"></a> |
| <span class="sourceLineNo">135</span> TinyLfuBlockCache cache = new TinyLfuBlockCache(maxSize, blockSize, blockSize, Runnable::run);<a name="line.135"></a> |
| <span class="sourceLineNo">136</span><a name="line.136"></a> |
| <span class="sourceLineNo">137</span> CachedItem [] singleBlocks = generateFixedBlocks(20, blockSize, "single");<a name="line.137"></a> |
| <span class="sourceLineNo">138</span> CachedItem [] multiBlocks = generateFixedBlocks(5, blockSize, "multi");<a name="line.138"></a> |
| <span class="sourceLineNo">139</span><a name="line.139"></a> |
| <span class="sourceLineNo">140</span> // Add 5 blocks from each<a name="line.140"></a> |
| <span class="sourceLineNo">141</span> for(int i=0; i<5; i++) {<a name="line.141"></a> |
| <span class="sourceLineNo">142</span> cache.cacheBlock(singleBlocks[i].cacheKey, singleBlocks[i]);<a name="line.142"></a> |
| <span class="sourceLineNo">143</span> cache.cacheBlock(multiBlocks[i].cacheKey, multiBlocks[i]);<a name="line.143"></a> |
| <span class="sourceLineNo">144</span> }<a name="line.144"></a> |
| <span class="sourceLineNo">145</span><a name="line.145"></a> |
| <span class="sourceLineNo">146</span> // Add frequency<a name="line.146"></a> |
| <span class="sourceLineNo">147</span> for (int i = 0; i < 5; i++) {<a name="line.147"></a> |
| <span class="sourceLineNo">148</span> for (int j = 0; j < 10; j++) {<a name="line.148"></a> |
| <span class="sourceLineNo">149</span> CachedItem block = multiBlocks[i];<a name="line.149"></a> |
| <span class="sourceLineNo">150</span> cache.getBlock(block.cacheKey, true, false, true);<a name="line.150"></a> |
| <span class="sourceLineNo">151</span> }<a name="line.151"></a> |
| <span class="sourceLineNo">152</span> }<a name="line.152"></a> |
| <span class="sourceLineNo">153</span><a name="line.153"></a> |
| <span class="sourceLineNo">154</span> // Let's keep "scanning" by adding single blocks. From here on we only<a name="line.154"></a> |
| <span class="sourceLineNo">155</span> // expect evictions from the single bucket.<a name="line.155"></a> |
| <span class="sourceLineNo">156</span><a name="line.156"></a> |
| <span class="sourceLineNo">157</span> for(int i=5;i<18;i++) {<a name="line.157"></a> |
| <span class="sourceLineNo">158</span> cache.cacheBlock(singleBlocks[i].cacheKey, singleBlocks[i]);<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> for (CachedItem block : multiBlocks) {<a name="line.161"></a> |
| <span class="sourceLineNo">162</span> assertTrue(cache.cache.asMap().containsKey(block.cacheKey));<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> assertEquals(10, cache.getBlockCount());<a name="line.165"></a> |
| <span class="sourceLineNo">166</span> assertEquals(13, cache.getStats().getEvictionCount());<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> |
| <span class="sourceLineNo">170</span> @Test<a name="line.170"></a> |
| <span class="sourceLineNo">171</span> public void testMaxBlockSize() throws Exception {<a name="line.171"></a> |
| <span class="sourceLineNo">172</span> long maxSize = 100000;<a name="line.172"></a> |
| <span class="sourceLineNo">173</span> long blockSize = calculateBlockSize(maxSize, 10);<a name="line.173"></a> |
| <span class="sourceLineNo">174</span><a name="line.174"></a> |
| <span class="sourceLineNo">175</span> TinyLfuBlockCache cache = new TinyLfuBlockCache(maxSize, blockSize, blockSize, Runnable::run);<a name="line.175"></a> |
| <span class="sourceLineNo">176</span> CachedItem [] tooLong = generateFixedBlocks(10, 2 * blockSize, "long");<a name="line.176"></a> |
| <span class="sourceLineNo">177</span> CachedItem [] small = generateFixedBlocks(15, blockSize / 2, "small");<a name="line.177"></a> |
| <span class="sourceLineNo">178</span><a name="line.178"></a> |
| <span class="sourceLineNo">179</span> for (CachedItem i:tooLong) {<a name="line.179"></a> |
| <span class="sourceLineNo">180</span> cache.cacheBlock(i.cacheKey, i);<a name="line.180"></a> |
| <span class="sourceLineNo">181</span> }<a name="line.181"></a> |
| <span class="sourceLineNo">182</span> for (CachedItem i:small) {<a name="line.182"></a> |
| <span class="sourceLineNo">183</span> cache.cacheBlock(i.cacheKey, i);<a name="line.183"></a> |
| <span class="sourceLineNo">184</span> }<a name="line.184"></a> |
| <span class="sourceLineNo">185</span> assertEquals(15,cache.getBlockCount());<a name="line.185"></a> |
| <span class="sourceLineNo">186</span> for (CachedItem i:small) {<a name="line.186"></a> |
| <span class="sourceLineNo">187</span> assertNotNull(cache.getBlock(i.cacheKey, true, false, false));<a name="line.187"></a> |
| <span class="sourceLineNo">188</span> }<a name="line.188"></a> |
| <span class="sourceLineNo">189</span> for (CachedItem i:tooLong) {<a name="line.189"></a> |
| <span class="sourceLineNo">190</span> assertNull(cache.getBlock(i.cacheKey, true, false, false));<a name="line.190"></a> |
| <span class="sourceLineNo">191</span> }<a name="line.191"></a> |
| <span class="sourceLineNo">192</span><a name="line.192"></a> |
| <span class="sourceLineNo">193</span> assertEquals(10, cache.getStats().getFailedInserts());<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> @Test<a name="line.196"></a> |
| <span class="sourceLineNo">197</span> public void testResizeBlockCache() throws Exception {<a name="line.197"></a> |
| <span class="sourceLineNo">198</span><a name="line.198"></a> |
| <span class="sourceLineNo">199</span> long maxSize = 100000;<a name="line.199"></a> |
| <span class="sourceLineNo">200</span> long blockSize = calculateBlockSize(maxSize, 10);<a name="line.200"></a> |
| <span class="sourceLineNo">201</span><a name="line.201"></a> |
| <span class="sourceLineNo">202</span> TinyLfuBlockCache cache = new TinyLfuBlockCache(maxSize, blockSize, blockSize, Runnable::run);<a name="line.202"></a> |
| <span class="sourceLineNo">203</span><a name="line.203"></a> |
| <span class="sourceLineNo">204</span> CachedItem [] blocks = generateFixedBlocks(10, blockSize, "block");<a name="line.204"></a> |
| <span class="sourceLineNo">205</span><a name="line.205"></a> |
| <span class="sourceLineNo">206</span> for(CachedItem block : blocks) {<a name="line.206"></a> |
| <span class="sourceLineNo">207</span> cache.cacheBlock(block.cacheKey, block);<a name="line.207"></a> |
| <span class="sourceLineNo">208</span> }<a name="line.208"></a> |
| <span class="sourceLineNo">209</span><a name="line.209"></a> |
| <span class="sourceLineNo">210</span> // Do not expect any evictions yet<a name="line.210"></a> |
| <span class="sourceLineNo">211</span> assertEquals(10, cache.getBlockCount());<a name="line.211"></a> |
| <span class="sourceLineNo">212</span> assertEquals(0, cache.getStats().getEvictionCount());<a name="line.212"></a> |
| <span class="sourceLineNo">213</span><a name="line.213"></a> |
| <span class="sourceLineNo">214</span> // Resize to half capacity plus an extra block (otherwise we evict an extra)<a name="line.214"></a> |
| <span class="sourceLineNo">215</span> cache.setMaxSize(maxSize / 2);<a name="line.215"></a> |
| <span class="sourceLineNo">216</span><a name="line.216"></a> |
| <span class="sourceLineNo">217</span> // And we expect 1/2 of the blocks to be evicted<a name="line.217"></a> |
| <span class="sourceLineNo">218</span> assertEquals(5, cache.getBlockCount());<a name="line.218"></a> |
| <span class="sourceLineNo">219</span> assertEquals(5, cache.getStats().getEvictedCount());<a name="line.219"></a> |
| <span class="sourceLineNo">220</span> }<a name="line.220"></a> |
| <span class="sourceLineNo">221</span><a name="line.221"></a> |
| <span class="sourceLineNo">222</span> private CachedItem [] generateFixedBlocks(int numBlocks, int size, String pfx) {<a name="line.222"></a> |
| <span class="sourceLineNo">223</span> CachedItem [] blocks = new CachedItem[numBlocks];<a name="line.223"></a> |
| <span class="sourceLineNo">224</span> for(int i=0;i<numBlocks;i++) {<a name="line.224"></a> |
| <span class="sourceLineNo">225</span> blocks[i] = new CachedItem(pfx + i, size);<a name="line.225"></a> |
| <span class="sourceLineNo">226</span> }<a name="line.226"></a> |
| <span class="sourceLineNo">227</span> return blocks;<a name="line.227"></a> |
| <span class="sourceLineNo">228</span> }<a name="line.228"></a> |
| <span class="sourceLineNo">229</span><a name="line.229"></a> |
| <span class="sourceLineNo">230</span> private CachedItem [] generateFixedBlocks(int numBlocks, long size, String pfx) {<a name="line.230"></a> |
| <span class="sourceLineNo">231</span> return generateFixedBlocks(numBlocks, (int)size, pfx);<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> private CachedItem [] generateRandomBlocks(int numBlocks, long maxSize) {<a name="line.234"></a> |
| <span class="sourceLineNo">235</span> CachedItem [] blocks = new CachedItem[numBlocks];<a name="line.235"></a> |
| <span class="sourceLineNo">236</span> Random r = new Random();<a name="line.236"></a> |
| <span class="sourceLineNo">237</span> for(int i=0;i<numBlocks;i++) {<a name="line.237"></a> |
| <span class="sourceLineNo">238</span> blocks[i] = new CachedItem("block" + i, r.nextInt((int)maxSize)+1);<a name="line.238"></a> |
| <span class="sourceLineNo">239</span> }<a name="line.239"></a> |
| <span class="sourceLineNo">240</span> return blocks;<a name="line.240"></a> |
| <span class="sourceLineNo">241</span> }<a name="line.241"></a> |
| <span class="sourceLineNo">242</span><a name="line.242"></a> |
| <span class="sourceLineNo">243</span> private long calculateBlockSize(long maxSize, int numBlocks) {<a name="line.243"></a> |
| <span class="sourceLineNo">244</span> long roughBlockSize = maxSize / numBlocks;<a name="line.244"></a> |
| <span class="sourceLineNo">245</span> int numEntries = (int)Math.ceil((1.2)*maxSize/roughBlockSize);<a name="line.245"></a> |
| <span class="sourceLineNo">246</span> long totalOverhead = LruBlockCache.CACHE_FIXED_OVERHEAD +<a name="line.246"></a> |
| <span class="sourceLineNo">247</span> ClassSize.CONCURRENT_HASHMAP +<a name="line.247"></a> |
| <span class="sourceLineNo">248</span> (numEntries * ClassSize.CONCURRENT_HASHMAP_ENTRY) +<a name="line.248"></a> |
| <span class="sourceLineNo">249</span> (LruBlockCache.DEFAULT_CONCURRENCY_LEVEL * ClassSize.CONCURRENT_HASHMAP_SEGMENT);<a name="line.249"></a> |
| <span class="sourceLineNo">250</span> long negateBlockSize = totalOverhead/numEntries;<a name="line.250"></a> |
| <span class="sourceLineNo">251</span> negateBlockSize += LruCachedBlock.PER_BLOCK_OVERHEAD;<a name="line.251"></a> |
| <span class="sourceLineNo">252</span> return ClassSize.align((long)Math.floor((roughBlockSize - negateBlockSize)*0.99f));<a name="line.252"></a> |
| <span class="sourceLineNo">253</span> }<a name="line.253"></a> |
| <span class="sourceLineNo">254</span><a name="line.254"></a> |
| <span class="sourceLineNo">255</span> private long calculateBlockSizeDefault(long maxSize, int numBlocks) {<a name="line.255"></a> |
| <span class="sourceLineNo">256</span> long roughBlockSize = maxSize / numBlocks;<a name="line.256"></a> |
| <span class="sourceLineNo">257</span> int numEntries = (int)Math.ceil((1.2)*maxSize/roughBlockSize);<a name="line.257"></a> |
| <span class="sourceLineNo">258</span> long totalOverhead = LruBlockCache.CACHE_FIXED_OVERHEAD +<a name="line.258"></a> |
| <span class="sourceLineNo">259</span> ClassSize.CONCURRENT_HASHMAP +<a name="line.259"></a> |
| <span class="sourceLineNo">260</span> (numEntries * ClassSize.CONCURRENT_HASHMAP_ENTRY) +<a name="line.260"></a> |
| <span class="sourceLineNo">261</span> (LruBlockCache.DEFAULT_CONCURRENCY_LEVEL * ClassSize.CONCURRENT_HASHMAP_SEGMENT);<a name="line.261"></a> |
| <span class="sourceLineNo">262</span> long negateBlockSize = totalOverhead / numEntries;<a name="line.262"></a> |
| <span class="sourceLineNo">263</span> negateBlockSize += LruCachedBlock.PER_BLOCK_OVERHEAD;<a name="line.263"></a> |
| <span class="sourceLineNo">264</span> return ClassSize.align((long)Math.floor((roughBlockSize - negateBlockSize)*<a name="line.264"></a> |
| <span class="sourceLineNo">265</span> LruBlockCache.DEFAULT_ACCEPTABLE_FACTOR));<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> private static class CachedItem implements Cacheable {<a name="line.268"></a> |
| <span class="sourceLineNo">269</span> BlockCacheKey cacheKey;<a name="line.269"></a> |
| <span class="sourceLineNo">270</span> int size;<a name="line.270"></a> |
| <span class="sourceLineNo">271</span><a name="line.271"></a> |
| <span class="sourceLineNo">272</span> CachedItem(String blockName, int size) {<a name="line.272"></a> |
| <span class="sourceLineNo">273</span> this.cacheKey = new BlockCacheKey(blockName, 0);<a name="line.273"></a> |
| <span class="sourceLineNo">274</span> this.size = size;<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> /** The size of this item reported to the block cache layer */<a name="line.277"></a> |
| <span class="sourceLineNo">278</span> @Override<a name="line.278"></a> |
| <span class="sourceLineNo">279</span> public long heapSize() {<a name="line.279"></a> |
| <span class="sourceLineNo">280</span> return ClassSize.align(size);<a name="line.280"></a> |
| <span class="sourceLineNo">281</span> }<a name="line.281"></a> |
| <span class="sourceLineNo">282</span><a name="line.282"></a> |
| <span class="sourceLineNo">283</span> @Override<a name="line.283"></a> |
| <span class="sourceLineNo">284</span> public int getSerializedLength() {<a name="line.284"></a> |
| <span class="sourceLineNo">285</span> return 0;<a name="line.285"></a> |
| <span class="sourceLineNo">286</span> }<a name="line.286"></a> |
| <span class="sourceLineNo">287</span><a name="line.287"></a> |
| <span class="sourceLineNo">288</span> @Override<a name="line.288"></a> |
| <span class="sourceLineNo">289</span> public CacheableDeserializer<Cacheable> getDeserializer() {<a name="line.289"></a> |
| <span class="sourceLineNo">290</span> return null;<a name="line.290"></a> |
| <span class="sourceLineNo">291</span> }<a name="line.291"></a> |
| <span class="sourceLineNo">292</span><a name="line.292"></a> |
| <span class="sourceLineNo">293</span> @Override<a name="line.293"></a> |
| <span class="sourceLineNo">294</span> public BlockType getBlockType() {<a name="line.294"></a> |
| <span class="sourceLineNo">295</span> return BlockType.DATA;<a name="line.295"></a> |
| <span class="sourceLineNo">296</span> }<a name="line.296"></a> |
| <span class="sourceLineNo">297</span><a name="line.297"></a> |
| <span class="sourceLineNo">298</span> @Override<a name="line.298"></a> |
| <span class="sourceLineNo">299</span> public void serialize(ByteBuffer destination, boolean includeNextBlockMetadata) {<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><a name="line.302"></a> |
| <span class="sourceLineNo">303</span>}<a name="line.303"></a> |
| <span class="sourceLineNo">304</span><a name="line.304"></a> |
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| </pre> |
| </div> |
| </body> |
| </html> |
