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From mi...@apache.org
Subject svn commit: r1710495 [3/12] - 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/...
Date Sun, 25 Oct 2015 23:17:10 GMT
Modified: hbase/hbase.apache.org/trunk/devapidocs/src-html/org/apache/hadoop/hbase/io/hfile/bucket/BucketAllocator.Bucket.html
URL: http://svn.apache.org/viewvc/hbase/hbase.apache.org/trunk/devapidocs/src-html/org/apache/hadoop/hbase/io/hfile/bucket/BucketAllocator.Bucket.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.Bucket.html (original)
+++ hbase/hbase.apache.org/trunk/devapidocs/src-html/org/apache/hadoop/hbase/io/hfile/bucket/BucketAllocator.Bucket.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 &lt; 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 &gt; 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 &gt; 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 &gt;= 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 &lt; 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 &lt; 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 &gt;= 0;<a name="line.154"></a>
-<span class="sourceLineNo">155</span>      assert offset &lt; 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 &gt; 0;<a name="line.157"></a>
-<span class="sourceLineNo">158</span>      assert freeCount &lt; 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 &lt; 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&lt;Bucket&gt; 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&lt;Bucket&gt;();<a name="line.180"></a>
-<span class="sourceLineNo">181</span>      freeBuckets = new LinkedList&lt;Bucket&gt;();<a name="line.181"></a>
-<span class="sourceLineNo">182</span>      completelyFreeBuckets = new LinkedList&lt;Bucket&gt;();<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>
-<span class="sourceLineNo">196</span>    }<a name="line.196"></a>
-<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() &gt; 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() &gt; 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() &gt; 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>
-<span class="sourceLineNo">232</span>      }<a name="line.232"></a>
-<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>
-<span class="sourceLineNo">236</span>    private synchronized void removeBucket(Bucket b) {<a name="line.236"></a>
-<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>
-<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>    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>
-<span class="sourceLineNo">248</span>      if (!freeBuckets.contains(b)) freeBuckets.add(b);<a name="line.248"></a>
-<span class="sourceLineNo">249</span>      if (b.isCompletelyFree()) completelyFreeBuckets.add(b);<a name="line.249"></a>
-<span class="sourceLineNo">250</span>    }<a name="line.250"></a>
-<span class="sourceLineNo">251</span><a name="line.251"></a>
-<span class="sourceLineNo">252</span>    public synchronized IndexStatistics statistics() {<a name="line.252"></a>
-<span class="sourceLineNo">253</span>      long free = 0, used = 0;<a name="line.253"></a>
-<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>
-<span class="sourceLineNo">257</span>      }<a name="line.257"></a>
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+<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>
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-<span class="sourceLineNo">521</span>    IndexStatistics[] stats = getIndexStatistics(total);<a name="line.521"></a>
-<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>
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+<span class="sourceLineNo">298</span>  private Bucket[] buckets;<a name="line.298"></a>
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+<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>
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+<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>
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+<span class="sourceLineNo">308</span>    this.bucketCapacity = FEWEST_ITEMS_IN_BUCKET * bigItemSize;<a name="line.308"></a>
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+<span class="sourceLineNo">311</span>      throw new BucketAllocatorException(<a name="line.311"></a>
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+<span class="sourceLineNo">321</span>          .instantiateBucket(buckets[i]);<a name="line.321"></a>
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+<span class="sourceLineNo">325</span><a name="line.325"></a>
+<span class="sourceLineNo">326</span>  /**<a name="line.326"></a>
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+<span class="sourceLineNo">329</span>   * @param map A map stores the block key and BucketEntry(block's meta data<a name="line.329"></a>
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+<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&lt;BlockCacheKey, BucketEntry&gt; 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>
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+<span class="sourceLineNo">342</span>    boolean[] reconfigured = new boolean[buckets.length];<a name="line.342"></a>
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+<span class="sourceLineNo">344</span>      long foundOffset = entry.getValue().offset();<a name="line.344"></a>
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+<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>
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+<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>
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+<span class="sourceLineNo">365</span>          throw new BucketAllocatorException(<a name="line.365"></a>
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+<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>
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+<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>
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+<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>
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+<span class="sourceLineNo">388</span>    for (int i = 0; i &lt; buckets.length; ++i) {<a name="line.388"></a>
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+<span class="sourceLineNo">390</span>      if (i &gt; 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>
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+<span class="sourceLineNo">404</span><a name="line.404"></a>
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+<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 &gt; 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 &lt; 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 ...]



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