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Posted to commits@hbase.apache.org by mi...@apache.org on 2015/10/26 00:17:10 UTC
svn commit: r1710495 [4/12] - in /hbase/hbase.apache.org/trunk: ./
devapidocs/org/apache/hadoop/hbase/io/hfile/bucket/
devapidocs/org/apache/hadoop/hbase/tmpl/master/
devapidocs/org/apache/hadoop/hbase/tmpl/regionserver/
devapidocs/src-html/org/apache/...
Modified: hbase/hbase.apache.org/trunk/devapidocs/src-html/org/apache/hadoop/hbase/io/hfile/bucket/BucketAllocator.html
URL: http://svn.apache.org/viewvc/hbase/hbase.apache.org/trunk/devapidocs/src-html/org/apache/hadoop/hbase/io/hfile/bucket/BucketAllocator.html?rev=1710495&r1=1710494&r2=1710495&view=diff
==============================================================================
--- hbase/hbase.apache.org/trunk/devapidocs/src-html/org/apache/hadoop/hbase/io/hfile/bucket/BucketAllocator.html (original)
+++ hbase/hbase.apache.org/trunk/devapidocs/src-html/org/apache/hadoop/hbase/io/hfile/bucket/BucketAllocator.html Sun Oct 25 23:17:08 2015
@@ -29,539 +29,541 @@
<span class="sourceLineNo">021</span>package org.apache.hadoop.hbase.io.hfile.bucket;<a name="line.21"></a>
<span class="sourceLineNo">022</span><a name="line.22"></a>
<span class="sourceLineNo">023</span>import java.util.Arrays;<a name="line.23"></a>
-<span class="sourceLineNo">024</span>import java.util.LinkedList;<a name="line.24"></a>
-<span class="sourceLineNo">025</span>import java.util.List;<a name="line.25"></a>
-<span class="sourceLineNo">026</span>import java.util.Map;<a name="line.26"></a>
-<span class="sourceLineNo">027</span>import java.util.concurrent.atomic.AtomicLong;<a name="line.27"></a>
-<span class="sourceLineNo">028</span><a name="line.28"></a>
-<span class="sourceLineNo">029</span>import org.apache.commons.logging.Log;<a name="line.29"></a>
-<span class="sourceLineNo">030</span>import org.apache.commons.logging.LogFactory;<a name="line.30"></a>
-<span class="sourceLineNo">031</span>import org.apache.hadoop.hbase.classification.InterfaceAudience;<a name="line.31"></a>
-<span class="sourceLineNo">032</span>import org.apache.hadoop.hbase.io.hfile.BlockCacheKey;<a name="line.32"></a>
-<span class="sourceLineNo">033</span>import org.apache.hadoop.hbase.io.hfile.CacheConfig;<a name="line.33"></a>
-<span class="sourceLineNo">034</span>import org.apache.hadoop.hbase.io.hfile.bucket.BucketCache.BucketEntry;<a name="line.34"></a>
-<span class="sourceLineNo">035</span>import org.codehaus.jackson.annotate.JsonIgnoreProperties;<a name="line.35"></a>
-<span class="sourceLineNo">036</span><a name="line.36"></a>
-<span class="sourceLineNo">037</span>import com.google.common.base.Objects;<a name="line.37"></a>
-<span class="sourceLineNo">038</span>import com.google.common.base.Preconditions;<a name="line.38"></a>
-<span class="sourceLineNo">039</span>import com.google.common.primitives.Ints;<a name="line.39"></a>
-<span class="sourceLineNo">040</span><a name="line.40"></a>
-<span class="sourceLineNo">041</span>/**<a name="line.41"></a>
-<span class="sourceLineNo">042</span> * This class is used to allocate a block with specified size and free the block<a name="line.42"></a>
-<span class="sourceLineNo">043</span> * when evicting. It manages an array of buckets, each bucket is associated with<a name="line.43"></a>
-<span class="sourceLineNo">044</span> * a size and caches elements up to this size. For a completely empty bucket, this<a name="line.44"></a>
-<span class="sourceLineNo">045</span> * size could be re-specified dynamically.<a name="line.45"></a>
-<span class="sourceLineNo">046</span> * <a name="line.46"></a>
-<span class="sourceLineNo">047</span> * This class is not thread safe.<a name="line.47"></a>
-<span class="sourceLineNo">048</span> */<a name="line.48"></a>
-<span class="sourceLineNo">049</span>@InterfaceAudience.Private<a name="line.49"></a>
-<span class="sourceLineNo">050</span>@JsonIgnoreProperties({"indexStatistics", "freeSize", "usedSize"})<a name="line.50"></a>
-<span class="sourceLineNo">051</span>public final class BucketAllocator {<a name="line.51"></a>
-<span class="sourceLineNo">052</span> private static final Log LOG = LogFactory.getLog(BucketAllocator.class);<a name="line.52"></a>
-<span class="sourceLineNo">053</span><a name="line.53"></a>
-<span class="sourceLineNo">054</span> @JsonIgnoreProperties({"completelyFree", "uninstantiated"})<a name="line.54"></a>
-<span class="sourceLineNo">055</span> public final static class Bucket {<a name="line.55"></a>
-<span class="sourceLineNo">056</span> private long baseOffset;<a name="line.56"></a>
-<span class="sourceLineNo">057</span> private int itemAllocationSize, sizeIndex;<a name="line.57"></a>
-<span class="sourceLineNo">058</span> private int itemCount;<a name="line.58"></a>
-<span class="sourceLineNo">059</span> private int freeList[];<a name="line.59"></a>
-<span class="sourceLineNo">060</span> private int freeCount, usedCount;<a name="line.60"></a>
-<span class="sourceLineNo">061</span><a name="line.61"></a>
-<span class="sourceLineNo">062</span> public Bucket(long offset) {<a name="line.62"></a>
-<span class="sourceLineNo">063</span> baseOffset = offset;<a name="line.63"></a>
-<span class="sourceLineNo">064</span> sizeIndex = -1;<a name="line.64"></a>
-<span class="sourceLineNo">065</span> }<a name="line.65"></a>
-<span class="sourceLineNo">066</span><a name="line.66"></a>
-<span class="sourceLineNo">067</span> void reconfigure(int sizeIndex, int[] bucketSizes, long bucketCapacity) {<a name="line.67"></a>
-<span class="sourceLineNo">068</span> Preconditions.checkElementIndex(sizeIndex, bucketSizes.length);<a name="line.68"></a>
-<span class="sourceLineNo">069</span> this.sizeIndex = sizeIndex;<a name="line.69"></a>
-<span class="sourceLineNo">070</span> itemAllocationSize = bucketSizes[sizeIndex];<a name="line.70"></a>
-<span class="sourceLineNo">071</span> itemCount = (int) (bucketCapacity / (long) itemAllocationSize);<a name="line.71"></a>
-<span class="sourceLineNo">072</span> freeCount = itemCount;<a name="line.72"></a>
-<span class="sourceLineNo">073</span> usedCount = 0;<a name="line.73"></a>
-<span class="sourceLineNo">074</span> freeList = new int[itemCount];<a name="line.74"></a>
-<span class="sourceLineNo">075</span> for (int i = 0; i < freeCount; ++i)<a name="line.75"></a>
-<span class="sourceLineNo">076</span> freeList[i] = i;<a name="line.76"></a>
-<span class="sourceLineNo">077</span> }<a name="line.77"></a>
-<span class="sourceLineNo">078</span><a name="line.78"></a>
-<span class="sourceLineNo">079</span> public boolean isUninstantiated() {<a name="line.79"></a>
-<span class="sourceLineNo">080</span> return sizeIndex == -1;<a name="line.80"></a>
-<span class="sourceLineNo">081</span> }<a name="line.81"></a>
-<span class="sourceLineNo">082</span><a name="line.82"></a>
-<span class="sourceLineNo">083</span> public int sizeIndex() {<a name="line.83"></a>
-<span class="sourceLineNo">084</span> return sizeIndex;<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 int getItemAllocationSize() {<a name="line.87"></a>
-<span class="sourceLineNo">088</span> return itemAllocationSize;<a name="line.88"></a>
-<span class="sourceLineNo">089</span> }<a name="line.89"></a>
-<span class="sourceLineNo">090</span><a name="line.90"></a>
-<span class="sourceLineNo">091</span> public boolean hasFreeSpace() {<a name="line.91"></a>
-<span class="sourceLineNo">092</span> return freeCount > 0;<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> public boolean isCompletelyFree() {<a name="line.95"></a>
-<span class="sourceLineNo">096</span> return usedCount == 0;<a name="line.96"></a>
-<span class="sourceLineNo">097</span> }<a name="line.97"></a>
-<span class="sourceLineNo">098</span><a name="line.98"></a>
-<span class="sourceLineNo">099</span> public int freeCount() {<a name="line.99"></a>
-<span class="sourceLineNo">100</span> return freeCount;<a name="line.100"></a>
-<span class="sourceLineNo">101</span> }<a name="line.101"></a>
-<span class="sourceLineNo">102</span><a name="line.102"></a>
-<span class="sourceLineNo">103</span> public int usedCount() {<a name="line.103"></a>
-<span class="sourceLineNo">104</span> return usedCount;<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> public int getFreeBytes() {<a name="line.107"></a>
-<span class="sourceLineNo">108</span> return freeCount * itemAllocationSize;<a name="line.108"></a>
-<span class="sourceLineNo">109</span> }<a name="line.109"></a>
-<span class="sourceLineNo">110</span><a name="line.110"></a>
-<span class="sourceLineNo">111</span> public int getUsedBytes() {<a name="line.111"></a>
-<span class="sourceLineNo">112</span> return usedCount * itemAllocationSize;<a name="line.112"></a>
-<span class="sourceLineNo">113</span> }<a name="line.113"></a>
-<span class="sourceLineNo">114</span><a name="line.114"></a>
-<span class="sourceLineNo">115</span> public long getBaseOffset() {<a name="line.115"></a>
-<span class="sourceLineNo">116</span> return baseOffset;<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> * Allocate a block in this bucket, return the offset representing the<a name="line.120"></a>
-<span class="sourceLineNo">121</span> * position in physical space<a name="line.121"></a>
-<span class="sourceLineNo">122</span> * @return the offset in the IOEngine<a name="line.122"></a>
-<span class="sourceLineNo">123</span> */<a name="line.123"></a>
-<span class="sourceLineNo">124</span> public long allocate() {<a name="line.124"></a>
-<span class="sourceLineNo">125</span> assert freeCount > 0; // Else should not have been called<a name="line.125"></a>
-<span class="sourceLineNo">126</span> assert sizeIndex != -1;<a name="line.126"></a>
-<span class="sourceLineNo">127</span> ++usedCount;<a name="line.127"></a>
-<span class="sourceLineNo">128</span> long offset = baseOffset + (freeList[--freeCount] * itemAllocationSize);<a name="line.128"></a>
-<span class="sourceLineNo">129</span> assert offset >= 0;<a name="line.129"></a>
-<span class="sourceLineNo">130</span> return offset;<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> public void addAllocation(long offset) throws BucketAllocatorException {<a name="line.133"></a>
-<span class="sourceLineNo">134</span> offset -= baseOffset;<a name="line.134"></a>
-<span class="sourceLineNo">135</span> if (offset < 0 || offset % itemAllocationSize != 0)<a name="line.135"></a>
-<span class="sourceLineNo">136</span> throw new BucketAllocatorException(<a name="line.136"></a>
-<span class="sourceLineNo">137</span> "Attempt to add allocation for bad offset: " + offset + " base="<a name="line.137"></a>
-<span class="sourceLineNo">138</span> + baseOffset + ", bucket size=" + itemAllocationSize);<a name="line.138"></a>
-<span class="sourceLineNo">139</span> int idx = (int) (offset / itemAllocationSize);<a name="line.139"></a>
-<span class="sourceLineNo">140</span> boolean matchFound = false;<a name="line.140"></a>
-<span class="sourceLineNo">141</span> for (int i = 0; i < freeCount; ++i) {<a name="line.141"></a>
-<span class="sourceLineNo">142</span> if (matchFound) freeList[i - 1] = freeList[i];<a name="line.142"></a>
-<span class="sourceLineNo">143</span> else if (freeList[i] == idx) matchFound = true;<a name="line.143"></a>
-<span class="sourceLineNo">144</span> }<a name="line.144"></a>
-<span class="sourceLineNo">145</span> if (!matchFound)<a name="line.145"></a>
-<span class="sourceLineNo">146</span> throw new BucketAllocatorException("Couldn't find match for index "<a name="line.146"></a>
-<span class="sourceLineNo">147</span> + idx + " in free list");<a name="line.147"></a>
-<span class="sourceLineNo">148</span> ++usedCount;<a name="line.148"></a>
-<span class="sourceLineNo">149</span> --freeCount;<a name="line.149"></a>
-<span class="sourceLineNo">150</span> }<a name="line.150"></a>
-<span class="sourceLineNo">151</span><a name="line.151"></a>
-<span class="sourceLineNo">152</span> private void free(long offset) {<a name="line.152"></a>
-<span class="sourceLineNo">153</span> offset -= baseOffset;<a name="line.153"></a>
-<span class="sourceLineNo">154</span> assert offset >= 0;<a name="line.154"></a>
-<span class="sourceLineNo">155</span> assert offset < itemCount * itemAllocationSize;<a name="line.155"></a>
-<span class="sourceLineNo">156</span> assert offset % itemAllocationSize == 0;<a name="line.156"></a>
-<span class="sourceLineNo">157</span> assert usedCount > 0;<a name="line.157"></a>
-<span class="sourceLineNo">158</span> assert freeCount < itemCount; // Else duplicate free<a name="line.158"></a>
-<span class="sourceLineNo">159</span> int item = (int) (offset / (long) itemAllocationSize);<a name="line.159"></a>
-<span class="sourceLineNo">160</span> assert !freeListContains(item);<a name="line.160"></a>
-<span class="sourceLineNo">161</span> --usedCount;<a name="line.161"></a>
-<span class="sourceLineNo">162</span> freeList[freeCount++] = item;<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> private boolean freeListContains(int blockNo) {<a name="line.165"></a>
-<span class="sourceLineNo">166</span> for (int i = 0; i < freeCount; ++i) {<a name="line.166"></a>
-<span class="sourceLineNo">167</span> if (freeList[i] == blockNo) return true;<a name="line.167"></a>
-<span class="sourceLineNo">168</span> }<a name="line.168"></a>
-<span class="sourceLineNo">169</span> return false;<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><a name="line.172"></a>
-<span class="sourceLineNo">173</span> final class BucketSizeInfo {<a name="line.173"></a>
-<span class="sourceLineNo">174</span> // Free bucket means it has space to allocate a block;<a name="line.174"></a>
-<span class="sourceLineNo">175</span> // Completely free bucket means it has no block.<a name="line.175"></a>
-<span class="sourceLineNo">176</span> private List<Bucket> bucketList, freeBuckets, completelyFreeBuckets;<a name="line.176"></a>
-<span class="sourceLineNo">177</span> private int sizeIndex;<a name="line.177"></a>
-<span class="sourceLineNo">178</span><a name="line.178"></a>
-<span class="sourceLineNo">179</span> BucketSizeInfo(int sizeIndex) {<a name="line.179"></a>
-<span class="sourceLineNo">180</span> bucketList = new LinkedList<Bucket>();<a name="line.180"></a>
-<span class="sourceLineNo">181</span> freeBuckets = new LinkedList<Bucket>();<a name="line.181"></a>
-<span class="sourceLineNo">182</span> completelyFreeBuckets = new LinkedList<Bucket>();<a name="line.182"></a>
-<span class="sourceLineNo">183</span> this.sizeIndex = sizeIndex;<a name="line.183"></a>
-<span class="sourceLineNo">184</span> }<a name="line.184"></a>
-<span class="sourceLineNo">185</span><a name="line.185"></a>
-<span class="sourceLineNo">186</span> public synchronized void instantiateBucket(Bucket b) {<a name="line.186"></a>
-<span class="sourceLineNo">187</span> assert b.isUninstantiated() || b.isCompletelyFree();<a name="line.187"></a>
-<span class="sourceLineNo">188</span> b.reconfigure(sizeIndex, bucketSizes, bucketCapacity);<a name="line.188"></a>
-<span class="sourceLineNo">189</span> bucketList.add(b);<a name="line.189"></a>
-<span class="sourceLineNo">190</span> freeBuckets.add(b);<a name="line.190"></a>
-<span class="sourceLineNo">191</span> completelyFreeBuckets.add(b);<a name="line.191"></a>
-<span class="sourceLineNo">192</span> }<a name="line.192"></a>
-<span class="sourceLineNo">193</span><a name="line.193"></a>
-<span class="sourceLineNo">194</span> public int sizeIndex() {<a name="line.194"></a>
-<span class="sourceLineNo">195</span> return sizeIndex;<a name="line.195"></a>
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-<span class="sourceLineNo">197</span><a name="line.197"></a>
-<span class="sourceLineNo">198</span> /**<a name="line.198"></a>
-<span class="sourceLineNo">199</span> * Find a bucket to allocate a block<a name="line.199"></a>
-<span class="sourceLineNo">200</span> * @return the offset in the IOEngine<a name="line.200"></a>
-<span class="sourceLineNo">201</span> */<a name="line.201"></a>
-<span class="sourceLineNo">202</span> public long allocateBlock() {<a name="line.202"></a>
-<span class="sourceLineNo">203</span> Bucket b = null;<a name="line.203"></a>
-<span class="sourceLineNo">204</span> if (freeBuckets.size() > 0) // Use up an existing one first...<a name="line.204"></a>
-<span class="sourceLineNo">205</span> b = freeBuckets.get(freeBuckets.size() - 1);<a name="line.205"></a>
-<span class="sourceLineNo">206</span> if (b == null) {<a name="line.206"></a>
-<span class="sourceLineNo">207</span> b = grabGlobalCompletelyFreeBucket();<a name="line.207"></a>
-<span class="sourceLineNo">208</span> if (b != null) instantiateBucket(b);<a name="line.208"></a>
-<span class="sourceLineNo">209</span> }<a name="line.209"></a>
-<span class="sourceLineNo">210</span> if (b == null) return -1;<a name="line.210"></a>
-<span class="sourceLineNo">211</span> long result = b.allocate();<a name="line.211"></a>
-<span class="sourceLineNo">212</span> blockAllocated(b);<a name="line.212"></a>
-<span class="sourceLineNo">213</span> return result;<a name="line.213"></a>
-<span class="sourceLineNo">214</span> }<a name="line.214"></a>
-<span class="sourceLineNo">215</span><a name="line.215"></a>
-<span class="sourceLineNo">216</span> void blockAllocated(Bucket b) {<a name="line.216"></a>
-<span class="sourceLineNo">217</span> if (!b.isCompletelyFree()) completelyFreeBuckets.remove(b);<a name="line.217"></a>
-<span class="sourceLineNo">218</span> if (!b.hasFreeSpace()) freeBuckets.remove(b);<a name="line.218"></a>
-<span class="sourceLineNo">219</span> }<a name="line.219"></a>
-<span class="sourceLineNo">220</span><a name="line.220"></a>
-<span class="sourceLineNo">221</span> public Bucket findAndRemoveCompletelyFreeBucket() {<a name="line.221"></a>
-<span class="sourceLineNo">222</span> Bucket b = null;<a name="line.222"></a>
-<span class="sourceLineNo">223</span> assert bucketList.size() > 0;<a name="line.223"></a>
-<span class="sourceLineNo">224</span> if (bucketList.size() == 1) {<a name="line.224"></a>
-<span class="sourceLineNo">225</span> // So we never get complete starvation of a bucket for a size<a name="line.225"></a>
-<span class="sourceLineNo">226</span> return null;<a name="line.226"></a>
-<span class="sourceLineNo">227</span> }<a name="line.227"></a>
-<span class="sourceLineNo">228</span><a name="line.228"></a>
-<span class="sourceLineNo">229</span> if (completelyFreeBuckets.size() > 0) {<a name="line.229"></a>
-<span class="sourceLineNo">230</span> b = completelyFreeBuckets.get(0);<a name="line.230"></a>
-<span class="sourceLineNo">231</span> removeBucket(b);<a name="line.231"></a>
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-<span class="sourceLineNo">233</span> return b;<a name="line.233"></a>
-<span class="sourceLineNo">234</span> }<a name="line.234"></a>
-<span class="sourceLineNo">235</span><a name="line.235"></a>
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-<span class="sourceLineNo">237</span> assert b.isCompletelyFree();<a name="line.237"></a>
-<span class="sourceLineNo">238</span> bucketList.remove(b);<a name="line.238"></a>
-<span class="sourceLineNo">239</span> freeBuckets.remove(b);<a name="line.239"></a>
-<span class="sourceLineNo">240</span> completelyFreeBuckets.remove(b);<a name="line.240"></a>
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-<span class="sourceLineNo">242</span><a name="line.242"></a>
-<span class="sourceLineNo">243</span> public void freeBlock(Bucket b, long offset) {<a name="line.243"></a>
-<span class="sourceLineNo">244</span> assert bucketList.contains(b);<a name="line.244"></a>
-<span class="sourceLineNo">245</span> // else we shouldn't have anything to free...<a name="line.245"></a>
-<span class="sourceLineNo">246</span> assert (!completelyFreeBuckets.contains(b));<a name="line.246"></a>
-<span class="sourceLineNo">247</span> b.free(offset);<a name="line.247"></a>
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-<span class="sourceLineNo">249</span> if (b.isCompletelyFree()) completelyFreeBuckets.add(b);<a name="line.249"></a>
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-<span class="sourceLineNo">251</span><a name="line.251"></a>
-<span class="sourceLineNo">252</span> public synchronized IndexStatistics statistics() {<a name="line.252"></a>
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-<span class="sourceLineNo">254</span> for (Bucket b : bucketList) {<a name="line.254"></a>
-<span class="sourceLineNo">255</span> free += b.freeCount();<a name="line.255"></a>
-<span class="sourceLineNo">256</span> used += b.usedCount();<a name="line.256"></a>
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-<span class="sourceLineNo">258</span> return new IndexStatistics(free, used, bucketSizes[sizeIndex]);<a name="line.258"></a>
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-<span class="sourceLineNo">262</span> public String toString() {<a name="line.262"></a>
-<span class="sourceLineNo">263</span> return Objects.toStringHelper(this.getClass())<a name="line.263"></a>
-<span class="sourceLineNo">264</span> .add("sizeIndex", sizeIndex)<a name="line.264"></a>
-<span class="sourceLineNo">265</span> .add("bucketSize", bucketSizes[sizeIndex])<a name="line.265"></a>
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-<span class="sourceLineNo">271</span> // reset it according to your cluster's block size distribution<a name="line.271"></a>
-<span class="sourceLineNo">272</span> // TODO Support the view of block size distribution statistics<a name="line.272"></a>
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-<span class="sourceLineNo">275</span> 56 * 1024 + 1024, 64 * 1024 + 1024, 96 * 1024 + 1024, 128 * 1024 + 1024,<a name="line.275"></a>
-<span class="sourceLineNo">276</span> 192 * 1024 + 1024, 256 * 1024 + 1024, 384 * 1024 + 1024,<a name="line.276"></a>
-<span class="sourceLineNo">277</span> 512 * 1024 + 1024 };<a name="line.277"></a>
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+<span class="sourceLineNo">024</span>import java.util.Map;<a name="line.24"></a>
+<span class="sourceLineNo">025</span>import java.util.concurrent.atomic.AtomicLong;<a name="line.25"></a>
+<span class="sourceLineNo">026</span><a name="line.26"></a>
+<span class="sourceLineNo">027</span>import org.apache.commons.collections.map.LinkedMap;<a name="line.27"></a>
+<span class="sourceLineNo">028</span>import org.apache.commons.logging.Log;<a name="line.28"></a>
+<span class="sourceLineNo">029</span>import org.apache.commons.logging.LogFactory;<a name="line.29"></a>
+<span class="sourceLineNo">030</span>import org.apache.hadoop.hbase.classification.InterfaceAudience;<a name="line.30"></a>
+<span class="sourceLineNo">031</span>import org.apache.hadoop.hbase.io.hfile.BlockCacheKey;<a name="line.31"></a>
+<span class="sourceLineNo">032</span>import org.apache.hadoop.hbase.io.hfile.CacheConfig;<a name="line.32"></a>
+<span class="sourceLineNo">033</span>import org.apache.hadoop.hbase.io.hfile.bucket.BucketCache.BucketEntry;<a name="line.33"></a>
+<span class="sourceLineNo">034</span>import org.codehaus.jackson.annotate.JsonIgnoreProperties;<a name="line.34"></a>
+<span class="sourceLineNo">035</span><a name="line.35"></a>
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+<span class="sourceLineNo">037</span>import com.google.common.base.Preconditions;<a name="line.37"></a>
+<span class="sourceLineNo">038</span>import com.google.common.primitives.Ints;<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>
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+<span class="sourceLineNo">042</span> * when evicting. It manages an array of buckets, each bucket is associated with<a name="line.42"></a>
+<span class="sourceLineNo">043</span> * a size and caches elements up to this size. For a completely empty bucket, this<a name="line.43"></a>
+<span class="sourceLineNo">044</span> * size could be re-specified dynamically.<a name="line.44"></a>
+<span class="sourceLineNo">045</span> * <a name="line.45"></a>
+<span class="sourceLineNo">046</span> * This class is not thread safe.<a name="line.46"></a>
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+<span class="sourceLineNo">049</span>@JsonIgnoreProperties({"indexStatistics", "freeSize", "usedSize"})<a name="line.49"></a>
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+<span class="sourceLineNo">052</span><a name="line.52"></a>
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+<span class="sourceLineNo">065</span><a name="line.65"></a>
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+<span class="sourceLineNo">068</span> this.sizeIndex = sizeIndex;<a name="line.68"></a>
+<span class="sourceLineNo">069</span> itemAllocationSize = bucketSizes[sizeIndex];<a name="line.69"></a>
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+<span class="sourceLineNo">109</span><a name="line.109"></a>
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+<span class="sourceLineNo">113</span><a name="line.113"></a>
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+<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> * Allocate a block in this bucket, return the offset representing the<a name="line.119"></a>
+<span class="sourceLineNo">120</span> * position in physical space<a name="line.120"></a>
+<span class="sourceLineNo">121</span> * @return the offset in the IOEngine<a name="line.121"></a>
+<span class="sourceLineNo">122</span> */<a name="line.122"></a>
+<span class="sourceLineNo">123</span> public long allocate() {<a name="line.123"></a>
+<span class="sourceLineNo">124</span> assert freeCount > 0; // Else should not have been called<a name="line.124"></a>
+<span class="sourceLineNo">125</span> assert sizeIndex != -1;<a name="line.125"></a>
+<span class="sourceLineNo">126</span> ++usedCount;<a name="line.126"></a>
+<span class="sourceLineNo">127</span> long offset = baseOffset + (freeList[--freeCount] * itemAllocationSize);<a name="line.127"></a>
+<span class="sourceLineNo">128</span> assert offset >= 0;<a name="line.128"></a>
+<span class="sourceLineNo">129</span> return offset;<a name="line.129"></a>
+<span class="sourceLineNo">130</span> }<a name="line.130"></a>
+<span class="sourceLineNo">131</span><a name="line.131"></a>
+<span class="sourceLineNo">132</span> public void addAllocation(long offset) throws BucketAllocatorException {<a name="line.132"></a>
+<span class="sourceLineNo">133</span> offset -= baseOffset;<a name="line.133"></a>
+<span class="sourceLineNo">134</span> if (offset < 0 || offset % itemAllocationSize != 0)<a name="line.134"></a>
+<span class="sourceLineNo">135</span> throw new BucketAllocatorException(<a name="line.135"></a>
+<span class="sourceLineNo">136</span> "Attempt to add allocation for bad offset: " + offset + " base="<a name="line.136"></a>
+<span class="sourceLineNo">137</span> + baseOffset + ", bucket size=" + itemAllocationSize);<a name="line.137"></a>
+<span class="sourceLineNo">138</span> int idx = (int) (offset / itemAllocationSize);<a name="line.138"></a>
+<span class="sourceLineNo">139</span> boolean matchFound = false;<a name="line.139"></a>
+<span class="sourceLineNo">140</span> for (int i = 0; i < freeCount; ++i) {<a name="line.140"></a>
+<span class="sourceLineNo">141</span> if (matchFound) freeList[i - 1] = freeList[i];<a name="line.141"></a>
+<span class="sourceLineNo">142</span> else if (freeList[i] == idx) matchFound = true;<a name="line.142"></a>
+<span class="sourceLineNo">143</span> }<a name="line.143"></a>
+<span class="sourceLineNo">144</span> if (!matchFound)<a name="line.144"></a>
+<span class="sourceLineNo">145</span> throw new BucketAllocatorException("Couldn't find match for index "<a name="line.145"></a>
+<span class="sourceLineNo">146</span> + idx + " in free list");<a name="line.146"></a>
+<span class="sourceLineNo">147</span> ++usedCount;<a name="line.147"></a>
+<span class="sourceLineNo">148</span> --freeCount;<a name="line.148"></a>
+<span class="sourceLineNo">149</span> }<a name="line.149"></a>
+<span class="sourceLineNo">150</span><a name="line.150"></a>
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+<span class="sourceLineNo">153</span> assert offset >= 0;<a name="line.153"></a>
+<span class="sourceLineNo">154</span> assert offset < itemCount * itemAllocationSize;<a name="line.154"></a>
+<span class="sourceLineNo">155</span> assert offset % itemAllocationSize == 0;<a name="line.155"></a>
+<span class="sourceLineNo">156</span> assert usedCount > 0;<a name="line.156"></a>
+<span class="sourceLineNo">157</span> assert freeCount < itemCount; // Else duplicate free<a name="line.157"></a>
+<span class="sourceLineNo">158</span> int item = (int) (offset / (long) itemAllocationSize);<a name="line.158"></a>
+<span class="sourceLineNo">159</span> assert !freeListContains(item);<a name="line.159"></a>
+<span class="sourceLineNo">160</span> --usedCount;<a name="line.160"></a>
+<span class="sourceLineNo">161</span> freeList[freeCount++] = item;<a name="line.161"></a>
+<span class="sourceLineNo">162</span> }<a name="line.162"></a>
+<span class="sourceLineNo">163</span><a name="line.163"></a>
+<span class="sourceLineNo">164</span> private boolean freeListContains(int blockNo) {<a name="line.164"></a>
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+<span class="sourceLineNo">166</span> if (freeList[i] == blockNo) return true;<a name="line.166"></a>
+<span class="sourceLineNo">167</span> }<a name="line.167"></a>
+<span class="sourceLineNo">168</span> return false;<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> final class BucketSizeInfo {<a name="line.172"></a>
+<span class="sourceLineNo">173</span> // Free bucket means it has space to allocate a block;<a name="line.173"></a>
+<span class="sourceLineNo">174</span> // Completely free bucket means it has no block.<a name="line.174"></a>
+<span class="sourceLineNo">175</span> private LinkedMap bucketList, freeBuckets, completelyFreeBuckets;<a name="line.175"></a>
+<span class="sourceLineNo">176</span> private int sizeIndex;<a name="line.176"></a>
+<span class="sourceLineNo">177</span><a name="line.177"></a>
+<span class="sourceLineNo">178</span> BucketSizeInfo(int sizeIndex) {<a name="line.178"></a>
+<span class="sourceLineNo">179</span> bucketList = new LinkedMap();<a name="line.179"></a>
+<span class="sourceLineNo">180</span> freeBuckets = new LinkedMap();<a name="line.180"></a>
+<span class="sourceLineNo">181</span> completelyFreeBuckets = new LinkedMap();<a name="line.181"></a>
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+<span class="sourceLineNo">183</span> }<a name="line.183"></a>
+<span class="sourceLineNo">184</span><a name="line.184"></a>
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+<span class="sourceLineNo">187</span> b.reconfigure(sizeIndex, bucketSizes, bucketCapacity);<a name="line.187"></a>
+<span class="sourceLineNo">188</span> bucketList.put(b, b);<a name="line.188"></a>
+<span class="sourceLineNo">189</span> freeBuckets.put(b, b);<a name="line.189"></a>
+<span class="sourceLineNo">190</span> completelyFreeBuckets.put(b, b);<a name="line.190"></a>
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+<span class="sourceLineNo">192</span><a name="line.192"></a>
+<span class="sourceLineNo">193</span> public int sizeIndex() {<a name="line.193"></a>
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+<span class="sourceLineNo">196</span><a name="line.196"></a>
+<span class="sourceLineNo">197</span> /**<a name="line.197"></a>
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+<span class="sourceLineNo">200</span> */<a name="line.200"></a>
+<span class="sourceLineNo">201</span> public long allocateBlock() {<a name="line.201"></a>
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+<span class="sourceLineNo">203</span> if (freeBuckets.size() > 0) {<a name="line.203"></a>
+<span class="sourceLineNo">204</span> // Use up an existing one first...<a name="line.204"></a>
+<span class="sourceLineNo">205</span> b = (Bucket) freeBuckets.lastKey();<a name="line.205"></a>
+<span class="sourceLineNo">206</span> }<a name="line.206"></a>
+<span class="sourceLineNo">207</span> if (b == null) {<a name="line.207"></a>
+<span class="sourceLineNo">208</span> b = grabGlobalCompletelyFreeBucket();<a name="line.208"></a>
+<span class="sourceLineNo">209</span> if (b != null) instantiateBucket(b);<a name="line.209"></a>
+<span class="sourceLineNo">210</span> }<a name="line.210"></a>
+<span class="sourceLineNo">211</span> if (b == null) return -1;<a name="line.211"></a>
+<span class="sourceLineNo">212</span> long result = b.allocate();<a name="line.212"></a>
+<span class="sourceLineNo">213</span> blockAllocated(b);<a name="line.213"></a>
+<span class="sourceLineNo">214</span> return result;<a name="line.214"></a>
+<span class="sourceLineNo">215</span> }<a name="line.215"></a>
+<span class="sourceLineNo">216</span><a name="line.216"></a>
+<span class="sourceLineNo">217</span> void blockAllocated(Bucket b) {<a name="line.217"></a>
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+<span class="sourceLineNo">219</span> if (!b.hasFreeSpace()) freeBuckets.remove(b);<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> public Bucket findAndRemoveCompletelyFreeBucket() {<a name="line.222"></a>
+<span class="sourceLineNo">223</span> Bucket b = null;<a name="line.223"></a>
+<span class="sourceLineNo">224</span> assert bucketList.size() > 0;<a name="line.224"></a>
+<span class="sourceLineNo">225</span> if (bucketList.size() == 1) {<a name="line.225"></a>
+<span class="sourceLineNo">226</span> // So we never get complete starvation of a bucket for a size<a name="line.226"></a>
+<span class="sourceLineNo">227</span> return null;<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> if (completelyFreeBuckets.size() > 0) {<a name="line.230"></a>
+<span class="sourceLineNo">231</span> b = (Bucket) completelyFreeBuckets.firstKey();<a name="line.231"></a>
+<span class="sourceLineNo">232</span> removeBucket(b);<a name="line.232"></a>
+<span class="sourceLineNo">233</span> }<a name="line.233"></a>
+<span class="sourceLineNo">234</span> return b;<a name="line.234"></a>
+<span class="sourceLineNo">235</span> }<a name="line.235"></a>
+<span class="sourceLineNo">236</span><a name="line.236"></a>
+<span class="sourceLineNo">237</span> private synchronized void removeBucket(Bucket b) {<a name="line.237"></a>
+<span class="sourceLineNo">238</span> assert b.isCompletelyFree();<a name="line.238"></a>
+<span class="sourceLineNo">239</span> bucketList.remove(b);<a name="line.239"></a>
+<span class="sourceLineNo">240</span> freeBuckets.remove(b);<a name="line.240"></a>
+<span class="sourceLineNo">241</span> completelyFreeBuckets.remove(b);<a name="line.241"></a>
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+<span class="sourceLineNo">243</span><a name="line.243"></a>
+<span class="sourceLineNo">244</span> public void freeBlock(Bucket b, long offset) {<a name="line.244"></a>
+<span class="sourceLineNo">245</span> assert bucketList.containsKey(b);<a name="line.245"></a>
+<span class="sourceLineNo">246</span> // else we shouldn't have anything to free...<a name="line.246"></a>
+<span class="sourceLineNo">247</span> assert (!completelyFreeBuckets.containsKey(b));<a name="line.247"></a>
+<span class="sourceLineNo">248</span> b.free(offset);<a name="line.248"></a>
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+<span class="sourceLineNo">250</span> if (b.isCompletelyFree()) completelyFreeBuckets.put(b, b);<a name="line.250"></a>
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+<span class="sourceLineNo">252</span><a name="line.252"></a>
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-<span class="sourceLineNo">388</span> if (i > 0) sb.append(", ");<a name="line.388"></a>
-<span class="sourceLineNo">389</span> sb.append("bucket.").append(i).append(": size=").append(b.getItemAllocationSize());<a name="line.389"></a>
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-<span class="sourceLineNo">421</span> " to accomodate if size seems reasonable and you want it cached.");<a name="line.421"></a>
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-<span class="sourceLineNo">522</span> LOG.info("Bucket allocator statistics follow:\n");<a name="line.522"></a>
-<span class="sourceLineNo">523</span> LOG.info(" Free bytes=" + total.freeBytes() + "+; used bytes="<a name="line.523"></a>
-<span class="sourceLineNo">524</span> + total.usedBytes() + "; total bytes=" + total.totalBytes());<a name="line.524"></a>
-<span class="sourceLineNo">525</span> for (IndexStatistics s : stats) {<a name="line.525"></a>
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-<span class="sourceLineNo">527</span> + "; free=" + s.freeCount() + "; total=" + s.totalCount());<a name="line.527"></a>
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-<span class="sourceLineNo">555</span><a name="line.555"></a>
-<span class="sourceLineNo">556</span>}<a name="line.556"></a>
+<span class="sourceLineNo">292</span> static public final int FEWEST_ITEMS_IN_BUCKET = 4;<a name="line.292"></a>
+<span class="sourceLineNo">293</span><a name="line.293"></a>
+<span class="sourceLineNo">294</span> private final int[] bucketSizes;<a name="line.294"></a>
+<span class="sourceLineNo">295</span> private final int bigItemSize;<a name="line.295"></a>
+<span class="sourceLineNo">296</span> // The capacity size for each bucket<a name="line.296"></a>
+<span class="sourceLineNo">297</span> private final long bucketCapacity;<a name="line.297"></a>
+<span class="sourceLineNo">298</span> private Bucket[] buckets;<a name="line.298"></a>
+<span class="sourceLineNo">299</span> private BucketSizeInfo[] bucketSizeInfos;<a name="line.299"></a>
+<span class="sourceLineNo">300</span> private final long totalSize;<a name="line.300"></a>
+<span class="sourceLineNo">301</span> private long usedSize = 0;<a name="line.301"></a>
+<span class="sourceLineNo">302</span><a name="line.302"></a>
+<span class="sourceLineNo">303</span> BucketAllocator(long availableSpace, int[] bucketSizes)<a name="line.303"></a>
+<span class="sourceLineNo">304</span> throws BucketAllocatorException {<a name="line.304"></a>
+<span class="sourceLineNo">305</span> this.bucketSizes = bucketSizes == null ? DEFAULT_BUCKET_SIZES : bucketSizes;<a name="line.305"></a>
+<span class="sourceLineNo">306</span> Arrays.sort(this.bucketSizes);<a name="line.306"></a>
+<span class="sourceLineNo">307</span> this.bigItemSize = Ints.max(this.bucketSizes);<a name="line.307"></a>
+<span class="sourceLineNo">308</span> this.bucketCapacity = FEWEST_ITEMS_IN_BUCKET * bigItemSize;<a name="line.308"></a>
+<span class="sourceLineNo">309</span> buckets = new Bucket[(int) (availableSpace / bucketCapacity)];<a name="line.309"></a>
+<span class="sourceLineNo">310</span> if (buckets.length < this.bucketSizes.length)<a name="line.310"></a>
+<span class="sourceLineNo">311</span> throw new BucketAllocatorException(<a name="line.311"></a>
+<span class="sourceLineNo">312</span> "Bucket allocator size too small - must have room for at least "<a name="line.312"></a>
+<span class="sourceLineNo">313</span> + this.bucketSizes.length + " buckets");<a name="line.313"></a>
+<span class="sourceLineNo">314</span> bucketSizeInfos = new BucketSizeInfo[this.bucketSizes.length];<a name="line.314"></a>
+<span class="sourceLineNo">315</span> for (int i = 0; i < this.bucketSizes.length; ++i) {<a name="line.315"></a>
+<span class="sourceLineNo">316</span> bucketSizeInfos[i] = new BucketSizeInfo(i);<a name="line.316"></a>
+<span class="sourceLineNo">317</span> }<a name="line.317"></a>
+<span class="sourceLineNo">318</span> for (int i = 0; i < buckets.length; ++i) {<a name="line.318"></a>
+<span class="sourceLineNo">319</span> buckets[i] = new Bucket(bucketCapacity * i);<a name="line.319"></a>
+<span class="sourceLineNo">320</span> bucketSizeInfos[i < this.bucketSizes.length ? i : this.bucketSizes.length - 1]<a name="line.320"></a>
+<span class="sourceLineNo">321</span> .instantiateBucket(buckets[i]);<a name="line.321"></a>
+<span class="sourceLineNo">322</span> }<a name="line.322"></a>
+<span class="sourceLineNo">323</span> this.totalSize = ((long) buckets.length) * bucketCapacity;<a name="line.323"></a>
+<span class="sourceLineNo">324</span> }<a name="line.324"></a>
+<span class="sourceLineNo">325</span><a name="line.325"></a>
+<span class="sourceLineNo">326</span> /**<a name="line.326"></a>
+<span class="sourceLineNo">327</span> * Rebuild the allocator's data structures from a persisted map.<a name="line.327"></a>
+<span class="sourceLineNo">328</span> * @param availableSpace capacity of cache<a name="line.328"></a>
+<span class="sourceLineNo">329</span> * @param map A map stores the block key and BucketEntry(block's meta data<a name="line.329"></a>
+<span class="sourceLineNo">330</span> * like offset, length)<a name="line.330"></a>
+<span class="sourceLineNo">331</span> * @param realCacheSize cached data size statistics for bucket cache<a name="line.331"></a>
+<span class="sourceLineNo">332</span> * @throws BucketAllocatorException<a name="line.332"></a>
+<span class="sourceLineNo">333</span> */<a name="line.333"></a>
+<span class="sourceLineNo">334</span> BucketAllocator(long availableSpace, int[] bucketSizes, Map<BlockCacheKey, BucketEntry> map,<a name="line.334"></a>
+<span class="sourceLineNo">335</span> AtomicLong realCacheSize) throws BucketAllocatorException {<a name="line.335"></a>
+<span class="sourceLineNo">336</span> this(availableSpace, bucketSizes);<a name="line.336"></a>
+<span class="sourceLineNo">337</span><a name="line.337"></a>
+<span class="sourceLineNo">338</span> // each bucket has an offset, sizeindex. probably the buckets are too big<a name="line.338"></a>
+<span class="sourceLineNo">339</span> // in our default state. so what we do is reconfigure them according to what<a name="line.339"></a>
+<span class="sourceLineNo">340</span> // we've found. we can only reconfigure each bucket once; if more than once,<a name="line.340"></a>
+<span class="sourceLineNo">341</span> // we know there's a bug, so we just log the info, throw, and start again...<a name="line.341"></a>
+<span class="sourceLineNo">342</span> boolean[] reconfigured = new boolean[buckets.length];<a name="line.342"></a>
+<span class="sourceLineNo">343</span> for (Map.Entry<BlockCacheKey, BucketEntry> entry : map.entrySet()) {<a name="line.343"></a>
+<span class="sourceLineNo">344</span> long foundOffset = entry.getValue().offset();<a name="line.344"></a>
+<span class="sourceLineNo">345</span> int foundLen = entry.getValue().getLength();<a name="line.345"></a>
+<span class="sourceLineNo">346</span> int bucketSizeIndex = -1;<a name="line.346"></a>
+<span class="sourceLineNo">347</span> for (int i = 0; i < bucketSizes.length; ++i) {<a name="line.347"></a>
+<span class="sourceLineNo">348</span> if (foundLen <= bucketSizes[i]) {<a name="line.348"></a>
+<span class="sourceLineNo">349</span> bucketSizeIndex = i;<a name="line.349"></a>
+<span class="sourceLineNo">350</span> break;<a name="line.350"></a>
+<span class="sourceLineNo">351</span> }<a name="line.351"></a>
+<span class="sourceLineNo">352</span> }<a name="line.352"></a>
+<span class="sourceLineNo">353</span> if (bucketSizeIndex == -1) {<a name="line.353"></a>
+<span class="sourceLineNo">354</span> throw new BucketAllocatorException(<a name="line.354"></a>
+<span class="sourceLineNo">355</span> "Can't match bucket size for the block with size " + foundLen);<a name="line.355"></a>
+<span class="sourceLineNo">356</span> }<a name="line.356"></a>
+<span class="sourceLineNo">357</span> int bucketNo = (int) (foundOffset / bucketCapacity);<a name="line.357"></a>
+<span class="sourceLineNo">358</span> if (bucketNo < 0 || bucketNo >= buckets.length)<a name="line.358"></a>
+<span class="sourceLineNo">359</span> throw new BucketAllocatorException("Can't find bucket " + bucketNo<a name="line.359"></a>
+<span class="sourceLineNo">360</span> + ", total buckets=" + buckets.length<a name="line.360"></a>
+<span class="sourceLineNo">361</span> + "; did you shrink the cache?");<a name="line.361"></a>
+<span class="sourceLineNo">362</span> Bucket b = buckets[bucketNo];<a name="line.362"></a>
+<span class="sourceLineNo">363</span> if (reconfigured[bucketNo]) {<a name="line.363"></a>
+<span class="sourceLineNo">364</span> if (b.sizeIndex() != bucketSizeIndex)<a name="line.364"></a>
+<span class="sourceLineNo">365</span> throw new BucketAllocatorException(<a name="line.365"></a>
+<span class="sourceLineNo">366</span> "Inconsistent allocation in bucket map;");<a name="line.366"></a>
+<span class="sourceLineNo">367</span> } else {<a name="line.367"></a>
+<span class="sourceLineNo">368</span> if (!b.isCompletelyFree())<a name="line.368"></a>
+<span class="sourceLineNo">369</span> throw new BucketAllocatorException("Reconfiguring bucket "<a name="line.369"></a>
+<span class="sourceLineNo">370</span> + bucketNo + " but it's already allocated; corrupt data");<a name="line.370"></a>
+<span class="sourceLineNo">371</span> // Need to remove the bucket from whichever list it's currently in at<a name="line.371"></a>
+<span class="sourceLineNo">372</span> // the moment...<a name="line.372"></a>
+<span class="sourceLineNo">373</span> BucketSizeInfo bsi = bucketSizeInfos[bucketSizeIndex];<a name="line.373"></a>
+<span class="sourceLineNo">374</span> BucketSizeInfo oldbsi = bucketSizeInfos[b.sizeIndex()];<a name="line.374"></a>
+<span class="sourceLineNo">375</span> oldbsi.removeBucket(b);<a name="line.375"></a>
+<span class="sourceLineNo">376</span> bsi.instantiateBucket(b);<a name="line.376"></a>
+<span class="sourceLineNo">377</span> reconfigured[bucketNo] = true;<a name="line.377"></a>
+<span class="sourceLineNo">378</span> }<a name="line.378"></a>
+<span class="sourceLineNo">379</span> realCacheSize.addAndGet(foundLen);<a name="line.379"></a>
+<span class="sourceLineNo">380</span> buckets[bucketNo].addAllocation(foundOffset);<a name="line.380"></a>
+<span class="sourceLineNo">381</span> usedSize += buckets[bucketNo].getItemAllocationSize();<a name="line.381"></a>
+<span class="sourceLineNo">382</span> bucketSizeInfos[bucketSizeIndex].blockAllocated(b);<a name="line.382"></a>
+<span class="sourceLineNo">383</span> }<a name="line.383"></a>
+<span class="sourceLineNo">384</span> }<a name="line.384"></a>
+<span class="sourceLineNo">385</span><a name="line.385"></a>
+<span class="sourceLineNo">386</span> public String toString() {<a name="line.386"></a>
+<span class="sourceLineNo">387</span> StringBuilder sb = new StringBuilder(1024);<a name="line.387"></a>
+<span class="sourceLineNo">388</span> for (int i = 0; i < buckets.length; ++i) {<a name="line.388"></a>
+<span class="sourceLineNo">389</span> Bucket b = buckets[i];<a name="line.389"></a>
+<span class="sourceLineNo">390</span> if (i > 0) sb.append(", ");<a name="line.390"></a>
+<span class="sourceLineNo">391</span> sb.append("bucket.").append(i).append(": size=").append(b.getItemAllocationSize());<a name="line.391"></a>
+<span class="sourceLineNo">392</span> sb.append(", freeCount=").append(b.freeCount()).append(", used=").append(b.usedCount());<a name="line.392"></a>
+<span class="sourceLineNo">393</span> }<a name="line.393"></a>
+<span class="sourceLineNo">394</span> return sb.toString();<a name="line.394"></a>
+<span class="sourceLineNo">395</span> }<a name="line.395"></a>
+<span class="sourceLineNo">396</span><a name="line.396"></a>
+<span class="sourceLineNo">397</span> public long getUsedSize() {<a name="line.397"></a>
+<span class="sourceLineNo">398</span> return this.usedSize;<a name="line.398"></a>
+<span class="sourceLineNo">399</span> }<a name="line.399"></a>
+<span class="sourceLineNo">400</span><a name="line.400"></a>
+<span class="sourceLineNo">401</span> public long getFreeSize() {<a name="line.401"></a>
+<span class="sourceLineNo">402</span> return this.totalSize - getUsedSize();<a name="line.402"></a>
+<span class="sourceLineNo">403</span> }<a name="line.403"></a>
+<span class="sourceLineNo">404</span><a name="line.404"></a>
+<span class="sourceLineNo">405</span> public long getTotalSize() {<a name="line.405"></a>
+<span class="sourceLineNo">406</span> return this.totalSize;<a name="line.406"></a>
+<span class="sourceLineNo">407</span> }<a name="line.407"></a>
+<span class="sourceLineNo">408</span><a name="line.408"></a>
+<span class="sourceLineNo">409</span> /**<a name="line.409"></a>
+<span class="sourceLineNo">410</span> * Allocate a block with specified size. Return the offset<a name="line.410"></a>
+<span class="sourceLineNo">411</span> * @param blockSize size of block<a name="line.411"></a>
+<span class="sourceLineNo">412</span> * @throws BucketAllocatorException<a name="line.412"></a>
+<span class="sourceLineNo">413</span> * @throws CacheFullException<a name="line.413"></a>
+<span class="sourceLineNo">414</span> * @return the offset in the IOEngine<a name="line.414"></a>
+<span class="sourceLineNo">415</span> */<a name="line.415"></a>
+<span class="sourceLineNo">416</span> public synchronized long allocateBlock(int blockSize) throws CacheFullException,<a name="line.416"></a>
+<span class="sourceLineNo">417</span> BucketAllocatorException {<a name="line.417"></a>
+<span class="sourceLineNo">418</span> assert blockSize > 0;<a name="line.418"></a>
+<span class="sourceLineNo">419</span> BucketSizeInfo bsi = roundUpToBucketSizeInfo(blockSize);<a name="line.419"></a>
+<span class="sourceLineNo">420</span> if (bsi == null) {<a name="line.420"></a>
+<span class="sourceLineNo">421</span> throw new BucketAllocatorException("Allocation too big size=" + blockSize +<a name="line.421"></a>
+<span class="sourceLineNo">422</span> "; adjust BucketCache sizes " + CacheConfig.BUCKET_CACHE_BUCKETS_KEY +<a name="line.422"></a>
+<span class="sourceLineNo">423</span> " to accomodate if size seems reasonable and you want it cached.");<a name="line.423"></a>
+<span class="sourceLineNo">424</span> }<a name="line.424"></a>
+<span class="sourceLineNo">425</span> long offset = bsi.allocateBlock();<a name="line.425"></a>
+<span class="sourceLineNo">426</span><a name="line.426"></a>
+<span class="sourceLineNo">427</span> // Ask caller to free up space and try again!<a name="line.427"></a>
+<span class="sourceLineNo">428</span> if (offset < 0)<a name="line.428"></a>
+<span class="sourceLineNo">429</span> throw new CacheFullException(blockSize, bsi.sizeIndex());<a name="line.429"></a>
+<span class="sourceLineNo">430</span> usedSize += bucketSizes[bsi.sizeIndex()];<a name="line.430"></a>
+<span class="sourceLineNo">431</span> return offset;<a name="line.431"></a>
[... 131 lines stripped ...]