http://git-wip-us.apache.org/repos/asf/hbase-site/blob/1f2eeb22/devapidocs/src-html/org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html
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diff --git 
a/devapidocs/src-html/org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html 
b/devapidocs/src-html/org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html
index b7c24d7..eecd2f9 100644
--- 
a/devapidocs/src-html/org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html
+++ 
b/devapidocs/src-html/org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html
@@ -44,792 +44,792 @@
 <span class="sourceLineNo">036</span>import java.util.List;<a 
name="line.36"></a>
 <span class="sourceLineNo">037</span>import java.util.Map;<a 
name="line.37"></a>
 <span class="sourceLineNo">038</span>import java.util.NavigableSet;<a 
name="line.38"></a>
-<span class="sourceLineNo">039</span>import java.util.Objects;<a 
name="line.39"></a>
-<span class="sourceLineNo">040</span>import java.util.PriorityQueue;<a 
name="line.40"></a>
-<span class="sourceLineNo">041</span>import java.util.Set;<a 
name="line.41"></a>
-<span class="sourceLineNo">042</span>import 
java.util.concurrent.ArrayBlockingQueue;<a name="line.42"></a>
-<span class="sourceLineNo">043</span>import 
java.util.concurrent.BlockingQueue;<a name="line.43"></a>
-<span class="sourceLineNo">044</span>import 
java.util.concurrent.ConcurrentHashMap;<a name="line.44"></a>
-<span class="sourceLineNo">045</span>import 
java.util.concurrent.ConcurrentMap;<a name="line.45"></a>
-<span class="sourceLineNo">046</span>import 
java.util.concurrent.ConcurrentSkipListSet;<a name="line.46"></a>
-<span class="sourceLineNo">047</span>import java.util.concurrent.Executors;<a 
name="line.47"></a>
-<span class="sourceLineNo">048</span>import 
java.util.concurrent.ScheduledExecutorService;<a name="line.48"></a>
-<span class="sourceLineNo">049</span>import java.util.concurrent.TimeUnit;<a 
name="line.49"></a>
-<span class="sourceLineNo">050</span>import 
java.util.concurrent.atomic.AtomicInteger;<a name="line.50"></a>
-<span class="sourceLineNo">051</span>import 
java.util.concurrent.atomic.AtomicLong;<a name="line.51"></a>
-<span class="sourceLineNo">052</span>import 
java.util.concurrent.atomic.LongAdder;<a name="line.52"></a>
-<span class="sourceLineNo">053</span>import java.util.concurrent.locks.Lock;<a 
name="line.53"></a>
-<span class="sourceLineNo">054</span>import 
java.util.concurrent.locks.ReentrantLock;<a name="line.54"></a>
-<span class="sourceLineNo">055</span>import 
java.util.concurrent.locks.ReentrantReadWriteLock;<a name="line.55"></a>
-<span class="sourceLineNo">056</span>import 
org.apache.hadoop.conf.Configuration;<a name="line.56"></a>
-<span class="sourceLineNo">057</span>import 
org.apache.hadoop.hbase.HBaseConfiguration;<a name="line.57"></a>
-<span class="sourceLineNo">058</span>import 
org.apache.hadoop.hbase.io.HeapSize;<a name="line.58"></a>
-<span class="sourceLineNo">059</span>import 
org.apache.hadoop.hbase.io.hfile.BlockCache;<a name="line.59"></a>
-<span class="sourceLineNo">060</span>import 
org.apache.hadoop.hbase.io.hfile.BlockCacheKey;<a name="line.60"></a>
-<span class="sourceLineNo">061</span>import 
org.apache.hadoop.hbase.io.hfile.BlockCacheUtil;<a name="line.61"></a>
-<span class="sourceLineNo">062</span>import 
org.apache.hadoop.hbase.io.hfile.BlockPriority;<a name="line.62"></a>
-<span class="sourceLineNo">063</span>import 
org.apache.hadoop.hbase.io.hfile.BlockType;<a name="line.63"></a>
-<span class="sourceLineNo">064</span>import 
org.apache.hadoop.hbase.io.hfile.CacheStats;<a name="line.64"></a>
-<span class="sourceLineNo">065</span>import 
org.apache.hadoop.hbase.io.hfile.Cacheable;<a name="line.65"></a>
-<span class="sourceLineNo">066</span>import 
org.apache.hadoop.hbase.io.hfile.Cacheable.MemoryType;<a name="line.66"></a>
-<span class="sourceLineNo">067</span>import 
org.apache.hadoop.hbase.io.hfile.CacheableDeserializer;<a name="line.67"></a>
-<span class="sourceLineNo">068</span>import 
org.apache.hadoop.hbase.io.hfile.CacheableDeserializerIdManager;<a 
name="line.68"></a>
-<span class="sourceLineNo">069</span>import 
org.apache.hadoop.hbase.io.hfile.CachedBlock;<a name="line.69"></a>
-<span class="sourceLineNo">070</span>import 
org.apache.hadoop.hbase.io.hfile.HFileBlock;<a name="line.70"></a>
-<span class="sourceLineNo">071</span>import 
org.apache.hadoop.hbase.nio.ByteBuff;<a name="line.71"></a>
-<span class="sourceLineNo">072</span>import 
org.apache.hadoop.hbase.util.EnvironmentEdgeManager;<a name="line.72"></a>
-<span class="sourceLineNo">073</span>import 
org.apache.hadoop.hbase.util.HasThread;<a name="line.73"></a>
-<span class="sourceLineNo">074</span>import 
org.apache.hadoop.hbase.util.IdReadWriteLock;<a name="line.74"></a>
-<span class="sourceLineNo">075</span>import 
org.apache.hadoop.hbase.util.IdReadWriteLock.ReferenceType;<a 
name="line.75"></a>
-<span class="sourceLineNo">076</span>import 
org.apache.hadoop.util.StringUtils;<a name="line.76"></a>
-<span class="sourceLineNo">077</span>import 
org.apache.yetus.audience.InterfaceAudience;<a name="line.77"></a>
-<span class="sourceLineNo">078</span>import org.slf4j.Logger;<a 
name="line.78"></a>
-<span class="sourceLineNo">079</span>import org.slf4j.LoggerFactory;<a 
name="line.79"></a>
-<span class="sourceLineNo">080</span><a name="line.80"></a>
-<span class="sourceLineNo">081</span>import 
org.apache.hbase.thirdparty.com.google.common.annotations.VisibleForTesting;<a 
name="line.81"></a>
-<span class="sourceLineNo">082</span>import 
org.apache.hbase.thirdparty.com.google.common.base.Preconditions;<a 
name="line.82"></a>
-<span class="sourceLineNo">083</span>import 
org.apache.hbase.thirdparty.com.google.common.util.concurrent.ThreadFactoryBuilder;<a
 name="line.83"></a>
-<span class="sourceLineNo">084</span><a name="line.84"></a>
-<span class="sourceLineNo">085</span>/**<a name="line.85"></a>
-<span class="sourceLineNo">086</span> * BucketCache uses {@link 
BucketAllocator} to allocate/free blocks, and uses<a name="line.86"></a>
-<span class="sourceLineNo">087</span> * BucketCache#ramCache and 
BucketCache#backingMap in order to<a name="line.87"></a>
-<span class="sourceLineNo">088</span> * determine if a given element is in the 
cache. The bucket cache can use on-heap or<a name="line.88"></a>
-<span class="sourceLineNo">089</span> * off-heap memory {@link 
ByteBufferIOEngine} or in a file {@link FileIOEngine} to<a name="line.89"></a>
-<span class="sourceLineNo">090</span> * store/read the block data.<a 
name="line.90"></a>
-<span class="sourceLineNo">091</span> *<a name="line.91"></a>
-<span class="sourceLineNo">092</span> * &lt;p&gt;Eviction is via a similar 
algorithm as used in<a name="line.92"></a>
-<span class="sourceLineNo">093</span> * {@link 
org.apache.hadoop.hbase.io.hfile.LruBlockCache}<a name="line.93"></a>
-<span class="sourceLineNo">094</span> *<a name="line.94"></a>
-<span class="sourceLineNo">095</span> * &lt;p&gt;BucketCache can be used as 
mainly a block cache (see<a name="line.95"></a>
-<span class="sourceLineNo">096</span> * {@link 
org.apache.hadoop.hbase.io.hfile.CombinedBlockCache}), combined with<a 
name="line.96"></a>
-<span class="sourceLineNo">097</span> * LruBlockCache to decrease CMS GC and 
heap fragmentation.<a name="line.97"></a>
-<span class="sourceLineNo">098</span> *<a name="line.98"></a>
-<span class="sourceLineNo">099</span> * &lt;p&gt;It also can be used as a 
secondary cache (e.g. using a file on ssd/fusionio to store<a 
name="line.99"></a>
-<span class="sourceLineNo">100</span> * blocks) to enlarge cache space via<a 
name="line.100"></a>
-<span class="sourceLineNo">101</span> * {@link 
org.apache.hadoop.hbase.io.hfile.LruBlockCache#setVictimCache}<a 
name="line.101"></a>
-<span class="sourceLineNo">102</span> */<a name="line.102"></a>
-<span class="sourceLineNo">103</span>@InterfaceAudience.Private<a 
name="line.103"></a>
-<span class="sourceLineNo">104</span>public class BucketCache implements 
BlockCache, HeapSize {<a name="line.104"></a>
-<span class="sourceLineNo">105</span>  private static final Logger LOG = 
LoggerFactory.getLogger(BucketCache.class);<a name="line.105"></a>
-<span class="sourceLineNo">106</span><a name="line.106"></a>
-<span class="sourceLineNo">107</span>  /** Priority buckets config */<a 
name="line.107"></a>
-<span class="sourceLineNo">108</span>  static final String 
SINGLE_FACTOR_CONFIG_NAME = "hbase.bucketcache.single.factor";<a 
name="line.108"></a>
-<span class="sourceLineNo">109</span>  static final String 
MULTI_FACTOR_CONFIG_NAME = "hbase.bucketcache.multi.factor";<a 
name="line.109"></a>
-<span class="sourceLineNo">110</span>  static final String 
MEMORY_FACTOR_CONFIG_NAME = "hbase.bucketcache.memory.factor";<a 
name="line.110"></a>
-<span class="sourceLineNo">111</span>  static final String 
EXTRA_FREE_FACTOR_CONFIG_NAME = "hbase.bucketcache.extrafreefactor";<a 
name="line.111"></a>
-<span class="sourceLineNo">112</span>  static final String 
ACCEPT_FACTOR_CONFIG_NAME = "hbase.bucketcache.acceptfactor";<a 
name="line.112"></a>
-<span class="sourceLineNo">113</span>  static final String 
MIN_FACTOR_CONFIG_NAME = "hbase.bucketcache.minfactor";<a name="line.113"></a>
-<span class="sourceLineNo">114</span><a name="line.114"></a>
-<span class="sourceLineNo">115</span>  /** Priority buckets */<a 
name="line.115"></a>
-<span class="sourceLineNo">116</span>  @VisibleForTesting<a 
name="line.116"></a>
-<span class="sourceLineNo">117</span>  static final float 
DEFAULT_SINGLE_FACTOR = 0.25f;<a name="line.117"></a>
-<span class="sourceLineNo">118</span>  static final float DEFAULT_MULTI_FACTOR 
= 0.50f;<a name="line.118"></a>
-<span class="sourceLineNo">119</span>  static final float 
DEFAULT_MEMORY_FACTOR = 0.25f;<a name="line.119"></a>
-<span class="sourceLineNo">120</span>  static final float DEFAULT_MIN_FACTOR = 
0.85f;<a name="line.120"></a>
-<span class="sourceLineNo">121</span><a name="line.121"></a>
-<span class="sourceLineNo">122</span>  private static final float 
DEFAULT_EXTRA_FREE_FACTOR = 0.10f;<a name="line.122"></a>
-<span class="sourceLineNo">123</span>  private static final float 
DEFAULT_ACCEPT_FACTOR = 0.95f;<a name="line.123"></a>
-<span class="sourceLineNo">124</span><a name="line.124"></a>
-<span class="sourceLineNo">125</span>  // Number of blocks to clear for each 
of the bucket size that is full<a name="line.125"></a>
-<span class="sourceLineNo">126</span>  private static final int 
DEFAULT_FREE_ENTIRE_BLOCK_FACTOR = 2;<a name="line.126"></a>
-<span class="sourceLineNo">127</span><a name="line.127"></a>
-<span class="sourceLineNo">128</span>  /** Statistics thread */<a 
name="line.128"></a>
-<span class="sourceLineNo">129</span>  private static final int 
statThreadPeriod = 5 * 60;<a name="line.129"></a>
-<span class="sourceLineNo">130</span><a name="line.130"></a>
-<span class="sourceLineNo">131</span>  final static int DEFAULT_WRITER_THREADS 
= 3;<a name="line.131"></a>
-<span class="sourceLineNo">132</span>  final static int 
DEFAULT_WRITER_QUEUE_ITEMS = 64;<a name="line.132"></a>
-<span class="sourceLineNo">133</span><a name="line.133"></a>
-<span class="sourceLineNo">134</span>  // Store/read block data<a 
name="line.134"></a>
-<span class="sourceLineNo">135</span>  final IOEngine ioEngine;<a 
name="line.135"></a>
-<span class="sourceLineNo">136</span><a name="line.136"></a>
-<span class="sourceLineNo">137</span>  // Store the block in this map before 
writing it to cache<a name="line.137"></a>
-<span class="sourceLineNo">138</span>  @VisibleForTesting<a 
name="line.138"></a>
-<span class="sourceLineNo">139</span>  final ConcurrentMap&lt;BlockCacheKey, 
RAMQueueEntry&gt; ramCache;<a name="line.139"></a>
-<span class="sourceLineNo">140</span>  // In this map, store the block's meta 
data like offset, length<a name="line.140"></a>
-<span class="sourceLineNo">141</span>  @VisibleForTesting<a 
name="line.141"></a>
-<span class="sourceLineNo">142</span>  ConcurrentMap&lt;BlockCacheKey, 
BucketEntry&gt; backingMap;<a name="line.142"></a>
-<span class="sourceLineNo">143</span><a name="line.143"></a>
-<span class="sourceLineNo">144</span>  /**<a name="line.144"></a>
-<span class="sourceLineNo">145</span>   * Flag if the cache is enabled or 
not... We shut it off if there are IO<a name="line.145"></a>
-<span class="sourceLineNo">146</span>   * errors for some time, so that Bucket 
IO exceptions/errors don't bring down<a name="line.146"></a>
-<span class="sourceLineNo">147</span>   * the HBase server.<a 
name="line.147"></a>
-<span class="sourceLineNo">148</span>   */<a name="line.148"></a>
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cacheEnabled;<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>   * A list of writer queues.  We have a 
queue per {@link WriterThread} we have running.<a name="line.152"></a>
-<span class="sourceLineNo">153</span>   * In other words, the work adding 
blocks to the BucketCache is divided up amongst the<a name="line.153"></a>
-<span class="sourceLineNo">154</span>   * running WriterThreads.  Its done by 
taking hash of the cache key modulo queue count.<a name="line.154"></a>
-<span class="sourceLineNo">155</span>   * WriterThread when it runs takes 
whatever has been recently added and 'drains' the entries<a name="line.155"></a>
-<span class="sourceLineNo">156</span>   * to the BucketCache.  It then updates 
the ramCache and backingMap accordingly.<a name="line.156"></a>
-<span class="sourceLineNo">157</span>   */<a name="line.157"></a>
-<span class="sourceLineNo">158</span>  @VisibleForTesting<a 
name="line.158"></a>
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ArrayList&lt;BlockingQueue&lt;RAMQueueEntry&gt;&gt; writerQueues = new 
ArrayList&lt;&gt;();<a name="line.159"></a>
-<span class="sourceLineNo">160</span>  @VisibleForTesting<a 
name="line.160"></a>
-<span class="sourceLineNo">161</span>  final WriterThread[] writerThreads;<a 
name="line.161"></a>
-<span class="sourceLineNo">162</span><a name="line.162"></a>
-<span class="sourceLineNo">163</span>  /** Volatile boolean to track if free 
space is in process or not */<a name="line.163"></a>
-<span class="sourceLineNo">164</span>  private volatile boolean freeInProgress 
= false;<a name="line.164"></a>
-<span class="sourceLineNo">165</span>  private final Lock freeSpaceLock = new 
ReentrantLock();<a name="line.165"></a>
-<span class="sourceLineNo">166</span><a name="line.166"></a>
-<span class="sourceLineNo">167</span>  private UniqueIndexMap&lt;Integer&gt; 
deserialiserMap = new UniqueIndexMap&lt;&gt;();<a name="line.167"></a>
-<span class="sourceLineNo">168</span><a name="line.168"></a>
-<span class="sourceLineNo">169</span>  private final LongAdder realCacheSize = 
new LongAdder();<a name="line.169"></a>
-<span class="sourceLineNo">170</span>  private final LongAdder heapSize = new 
LongAdder();<a name="line.170"></a>
-<span class="sourceLineNo">171</span>  /** Current number of cached elements 
*/<a name="line.171"></a>
-<span class="sourceLineNo">172</span>  private final LongAdder blockNumber = 
new LongAdder();<a name="line.172"></a>
-<span class="sourceLineNo">173</span><a name="line.173"></a>
-<span class="sourceLineNo">174</span>  /** Cache access count (sequential ID) 
*/<a name="line.174"></a>
-<span class="sourceLineNo">175</span>  private final AtomicLong accessCount = 
new AtomicLong();<a name="line.175"></a>
-<span class="sourceLineNo">176</span><a name="line.176"></a>
-<span class="sourceLineNo">177</span>  private static final int 
DEFAULT_CACHE_WAIT_TIME = 50;<a name="line.177"></a>
-<span class="sourceLineNo">178</span>  // Used in test now. If the flag is 
false and the cache speed is very fast,<a name="line.178"></a>
-<span class="sourceLineNo">179</span>  // bucket cache will skip some blocks 
when caching. If the flag is true, we<a name="line.179"></a>
-<span class="sourceLineNo">180</span>  // will wait blocks flushed to IOEngine 
for some time when caching<a name="line.180"></a>
-<span class="sourceLineNo">181</span>  boolean wait_when_cache = false;<a 
name="line.181"></a>
-<span class="sourceLineNo">182</span><a name="line.182"></a>
-<span class="sourceLineNo">183</span>  private final BucketCacheStats 
cacheStats = new BucketCacheStats();<a name="line.183"></a>
-<span class="sourceLineNo">184</span><a name="line.184"></a>
-<span class="sourceLineNo">185</span>  private final String persistencePath;<a 
name="line.185"></a>
-<span class="sourceLineNo">186</span>  private final long cacheCapacity;<a 
name="line.186"></a>
-<span class="sourceLineNo">187</span>  /** Approximate block size */<a 
name="line.187"></a>
-<span class="sourceLineNo">188</span>  private final long blockSize;<a 
name="line.188"></a>
-<span class="sourceLineNo">189</span><a name="line.189"></a>
-<span class="sourceLineNo">190</span>  /** Duration of IO errors tolerated 
before we disable cache, 1 min as default */<a name="line.190"></a>
-<span class="sourceLineNo">191</span>  private final int 
ioErrorsTolerationDuration;<a name="line.191"></a>
-<span class="sourceLineNo">192</span>  // 1 min<a name="line.192"></a>
-<span class="sourceLineNo">193</span>  public static final int 
DEFAULT_ERROR_TOLERATION_DURATION = 60 * 1000;<a name="line.193"></a>
-<span class="sourceLineNo">194</span><a name="line.194"></a>
-<span class="sourceLineNo">195</span>  // Start time of first IO error when 
reading or writing IO Engine, it will be<a name="line.195"></a>
-<span class="sourceLineNo">196</span>  // reset after a successful 
read/write.<a name="line.196"></a>
-<span class="sourceLineNo">197</span>  private volatile long ioErrorStartTime 
= -1;<a name="line.197"></a>
-<span class="sourceLineNo">198</span><a name="line.198"></a>
-<span class="sourceLineNo">199</span>  /**<a name="line.199"></a>
-<span class="sourceLineNo">200</span>   * A ReentrantReadWriteLock to lock on 
a particular block identified by offset.<a name="line.200"></a>
-<span class="sourceLineNo">201</span>   * The purpose of this is to avoid 
freeing the block which is being read.<a name="line.201"></a>
-<span class="sourceLineNo">202</span>   * &lt;p&gt;<a name="line.202"></a>
-<span class="sourceLineNo">203</span>   * Key set of offsets in BucketCache is 
limited so soft reference is the best choice here.<a name="line.203"></a>
-<span class="sourceLineNo">204</span>   */<a name="line.204"></a>
-<span class="sourceLineNo">205</span>  @VisibleForTesting<a 
name="line.205"></a>
-<span class="sourceLineNo">206</span>  final IdReadWriteLock offsetLock = new 
IdReadWriteLock(ReferenceType.SOFT);<a name="line.206"></a>
-<span class="sourceLineNo">207</span><a name="line.207"></a>
-<span class="sourceLineNo">208</span>  private final 
NavigableSet&lt;BlockCacheKey&gt; blocksByHFile =<a name="line.208"></a>
-<span class="sourceLineNo">209</span>      new 
ConcurrentSkipListSet&lt;&gt;(new Comparator&lt;BlockCacheKey&gt;() {<a 
name="line.209"></a>
-<span class="sourceLineNo">210</span>        @Override<a name="line.210"></a>
-<span class="sourceLineNo">211</span>        public int compare(BlockCacheKey 
a, BlockCacheKey b) {<a name="line.211"></a>
-<span class="sourceLineNo">212</span>          int nameComparison = 
a.getHfileName().compareTo(b.getHfileName());<a name="line.212"></a>
-<span class="sourceLineNo">213</span>          if (nameComparison != 0) {<a 
name="line.213"></a>
-<span class="sourceLineNo">214</span>            return nameComparison;<a 
name="line.214"></a>
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-<span class="sourceLineNo">217</span>          if (a.getOffset() == 
b.getOffset()) {<a name="line.217"></a>
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name="line.218"></a>
-<span class="sourceLineNo">219</span>          } else if (a.getOffset() &lt; 
b.getOffset()) {<a name="line.219"></a>
-<span class="sourceLineNo">220</span>            return -1;<a 
name="line.220"></a>
-<span class="sourceLineNo">221</span>          }<a name="line.221"></a>
-<span class="sourceLineNo">222</span>          return 1;<a name="line.222"></a>
-<span class="sourceLineNo">223</span>        }<a name="line.223"></a>
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-<span class="sourceLineNo">225</span><a name="line.225"></a>
-<span class="sourceLineNo">226</span>  /** Statistics thread schedule pool 
(for heavy debugging, could remove) */<a name="line.226"></a>
-<span class="sourceLineNo">227</span>  private final ScheduledExecutorService 
scheduleThreadPool = Executors.newScheduledThreadPool(1,<a name="line.227"></a>
-<span class="sourceLineNo">228</span>    new 
ThreadFactoryBuilder().setNameFormat("BucketCacheStatsExecutor").setDaemon(true).build());<a
 name="line.228"></a>
-<span class="sourceLineNo">229</span><a name="line.229"></a>
-<span class="sourceLineNo">230</span>  // Allocate or free space for the 
block<a name="line.230"></a>
-<span class="sourceLineNo">231</span>  private BucketAllocator 
bucketAllocator;<a name="line.231"></a>
-<span class="sourceLineNo">232</span><a name="line.232"></a>
-<span class="sourceLineNo">233</span>  /** Acceptable size of cache (no 
evictions if size &lt; acceptable) */<a name="line.233"></a>
-<span class="sourceLineNo">234</span>  private float acceptableFactor;<a 
name="line.234"></a>
-<span class="sourceLineNo">235</span><a name="line.235"></a>
-<span class="sourceLineNo">236</span>  /** Minimum threshold of cache (when 
evicting, evict until size &lt; min) */<a name="line.236"></a>
-<span class="sourceLineNo">237</span>  private float minFactor;<a 
name="line.237"></a>
-<span class="sourceLineNo">238</span><a name="line.238"></a>
-<span class="sourceLineNo">239</span>  /** Free this floating point factor of 
extra blocks when evicting. For example free the number of blocks requested * 
(1 + extraFreeFactor) */<a name="line.239"></a>
-<span class="sourceLineNo">240</span>  private float extraFreeFactor;<a 
name="line.240"></a>
-<span class="sourceLineNo">241</span><a name="line.241"></a>
-<span class="sourceLineNo">242</span>  /** Single access bucket size */<a 
name="line.242"></a>
-<span class="sourceLineNo">243</span>  private float singleFactor;<a 
name="line.243"></a>
-<span class="sourceLineNo">244</span><a name="line.244"></a>
-<span class="sourceLineNo">245</span>  /** Multiple access bucket size */<a 
name="line.245"></a>
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int writerQLen, String persistencePath, int ioErrorsTolerationDuration,<a 
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conf.getFloat(MIN_FACTOR_CONFIG_NAME, DEFAULT_MIN_FACTOR);<a 
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extraFreeFactor + ", singleFactor: " + singleFactor + ", multiFactor: " + 
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memoryFactor);<a name="line.281"></a>
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this.scheduleThreadPool.scheduleAtFixedRate(new StatisticsThread(this),<a 
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+ writerQLen + ", persistencePath=" +<a name="line.325"></a>
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bucketAllocator=" + this.bucketAllocator.getClass().getName());<a 
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Preconditions.checkArgument(acceptableFactor &lt;= 1 &amp;&amp; 
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ACCEPT_FACTOR_CONFIG_NAME);<a name="line.332"></a>
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Preconditions.checkArgument(extraFreeFactor &gt;= 0, 
EXTRA_FREE_FACTOR_CONFIG_NAME + " must be greater than 0.0");<a 
name="line.333"></a>
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Preconditions.checkArgument(singleFactor &lt;= 1 &amp;&amp; singleFactor &gt;= 
0, SINGLE_FACTOR_CONFIG_NAME + " must be between 0.0 and 1.0");<a 
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Preconditions.checkArgument(multiFactor &lt;= 1 &amp;&amp; multiFactor &gt;= 0, 
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Preconditions.checkArgument(memoryFactor &lt;= 1 &amp;&amp; memoryFactor &gt;= 
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Preconditions.checkArgument((singleFactor + multiFactor + memoryFactor) == 1, 
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" + MEMORY_FACTOR_CONFIG_NAME + " segments must add up to 1.0");<a 
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(StringUtils.formatPercent(cacheStats.getHitRatio(), 2)+ ", ")) +<a 
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{<a name="line.727"></a>
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O(Handler Count) unless something else is wrong<a name="line.729"></a>
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new HashSet&lt;Integer&gt;();<a name="line.730"></a>
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stats.length; i++) {<a name="line.766"></a>
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stats[i].itemSize() * (freeGoal - stats[i].freeCount());<a name="line.771"></a>
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bytesToFreeForBucket[i];<a name="line.772"></a>
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bucketSize(" + stats[i].itemSize() + ")="<a name="line.774"></a>
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StringUtils.byteDesc(bytesToFreeForBucket[i]) + ", ");<a name="line.775"></a>
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bucketAllocator.getTotalSize();<a name="line.787"></a>
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msgBuffer != null) {<a name="line.788"></a>
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\"" + why + "\"; " + msgBuffer.toString() +<a name="line.789"></a>
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StringUtils.byteDesc(currentSize) + ", actual cacheSize=" +<a 
name="line.790"></a>
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StringUtils.byteDesc(realCacheSize.sum()) + ", total=" + 
StringUtils.byteDesc(totalSize));<a name="line.791"></a>
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Math.floor(bytesToFreeWithoutExtra<a name="line.794"></a>
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BucketEntryGroup(bytesToFreeWithExtra,<a name="line.798"></a>
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getPartitionSize(singleFactor));<a name="line.799"></a>
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getPartitionSize(multiFactor));<a name="line.801"></a>
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BucketEntryGroup(bytesToFreeWithExtra,<a name="line.802"></a>
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getPartitionSize(memoryFactor));<a name="line.803"></a>
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entry into appropriate bucket entry<a name="line.805"></a>
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BucketEntry&gt; bucketEntryWithKey : backingMap.entrySet()) {<a 
name="line.807"></a>
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(bucketEntryWithKey.getValue().getPriority()) {<a name="line.808"></a>
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bucketSingle.add(bucketEntryWithKey);<a name="line.810"></a>
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bucketMulti.add(bucketEntryWithKey);<a name="line.814"></a>
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bucketMemory.add(bucketEntryWithKey);<a name="line.818"></a>
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PriorityQueue&lt;BucketEntryGroup&gt; bucketQueue = new 
PriorityQueue&lt;&gt;(3);<a name="line.824"></a>
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name="line.39"></a>
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name="line.40"></a>
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java.util.concurrent.ArrayBlockingQueue;<a name="line.41"></a>
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java.util.concurrent.BlockingQueue;<a name="line.42"></a>
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java.util.concurrent.ConcurrentHashMap;<a name="line.43"></a>
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java.util.concurrent.ConcurrentMap;<a name="line.44"></a>
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java.util.concurrent.ConcurrentSkipListSet;<a name="line.45"></a>
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name="line.46"></a>
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java.util.concurrent.ScheduledExecutorService;<a name="line.47"></a>
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name="line.48"></a>
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java.util.concurrent.atomic.AtomicInteger;<a name="line.49"></a>
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java.util.concurrent.atomic.AtomicLong;<a name="line.50"></a>
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java.util.concurrent.atomic.LongAdder;<a name="line.51"></a>
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name="line.52"></a>
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java.util.concurrent.locks.ReentrantLock;<a name="line.53"></a>
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java.util.concurrent.locks.ReentrantReadWriteLock;<a name="line.54"></a>
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org.apache.hadoop.conf.Configuration;<a name="line.55"></a>
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org.apache.hadoop.hbase.HBaseConfiguration;<a name="line.56"></a>
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org.apache.hadoop.hbase.io.HeapSize;<a name="line.57"></a>
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org.apache.hadoop.hbase.io.hfile.BlockCache;<a name="line.58"></a>
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org.apache.hadoop.hbase.io.hfile.BlockCacheKey;<a name="line.59"></a>
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org.apache.hadoop.hbase.io.hfile.BlockCacheUtil;<a name="line.60"></a>
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org.apache.hadoop.hbase.io.hfile.BlockPriority;<a name="line.61"></a>
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org.apache.hadoop.hbase.io.hfile.BlockType;<a name="line.62"></a>
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org.apache.hadoop.hbase.io.hfile.CacheStats;<a name="line.63"></a>
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org.apache.hadoop.hbase.io.hfile.Cacheable;<a name="line.64"></a>
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org.apache.hadoop.hbase.io.hfile.Cacheable.MemoryType;<a name="line.65"></a>
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org.apache.hadoop.hbase.io.hfile.CacheableDeserializer;<a name="line.66"></a>
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org.apache.hadoop.hbase.io.hfile.CacheableDeserializerIdManager;<a 
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org.apache.hadoop.hbase.io.hfile.CachedBlock;<a name="line.68"></a>
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org.apache.hadoop.hbase.io.hfile.HFileBlock;<a name="line.69"></a>
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org.apache.hadoop.hbase.nio.ByteBuff;<a name="line.70"></a>
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org.apache.hadoop.hbase.util.EnvironmentEdgeManager;<a name="line.71"></a>
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org.apache.hadoop.hbase.util.HasThread;<a name="line.72"></a>
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org.apache.hadoop.hbase.util.IdReadWriteLock;<a name="line.73"></a>
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org.apache.hadoop.hbase.util.IdReadWriteLock.ReferenceType;<a 
name="line.74"></a>
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org.apache.hadoop.util.StringUtils;<a name="line.75"></a>
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org.apache.yetus.audience.InterfaceAudience;<a name="line.76"></a>
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name="line.77"></a>
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name="line.78"></a>
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org.apache.hbase.thirdparty.com.google.common.annotations.VisibleForTesting;<a 
name="line.80"></a>
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org.apache.hbase.thirdparty.com.google.common.base.Preconditions;<a 
name="line.81"></a>
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org.apache.hbase.thirdparty.com.google.common.util.concurrent.ThreadFactoryBuilder;<a
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+<span class="sourceLineNo">083</span><a name="line.83"></a>
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+<span class="sourceLineNo">085</span> * BucketCache uses {@link 
BucketAllocator} to allocate/free blocks, and uses<a name="line.85"></a>
+<span class="sourceLineNo">086</span> * BucketCache#ramCache and 
BucketCache#backingMap in order to<a name="line.86"></a>
+<span class="sourceLineNo">087</span> * determine if a given element is in the 
cache. The bucket cache can use on-heap or<a name="line.87"></a>
+<span class="sourceLineNo">088</span> * off-heap memory {@link 
ByteBufferIOEngine} or in a file {@link FileIOEngine} to<a name="line.88"></a>
+<span class="sourceLineNo">089</span> * store/read the block data.<a 
name="line.89"></a>
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algorithm as used in<a name="line.91"></a>
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org.apache.hadoop.hbase.io.hfile.LruBlockCache}<a name="line.92"></a>
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mainly a block cache (see<a name="line.94"></a>
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org.apache.hadoop.hbase.io.hfile.CombinedBlockCache}), combined with<a 
name="line.95"></a>
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heap fragmentation.<a name="line.96"></a>
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secondary cache (e.g. using a file on ssd/fusionio to store<a 
name="line.98"></a>
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name="line.99"></a>
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org.apache.hadoop.hbase.io.hfile.LruBlockCache#setVictimCache}<a 
name="line.100"></a>
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name="line.102"></a>
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BlockCache, HeapSize {<a name="line.103"></a>
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LoggerFactory.getLogger(BucketCache.class);<a name="line.104"></a>
+<span class="sourceLineNo">105</span><a name="line.105"></a>
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name="line.106"></a>
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SINGLE_FACTOR_CONFIG_NAME = "hbase.bucketcache.single.factor";<a 
name="line.107"></a>
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MULTI_FACTOR_CONFIG_NAME = "hbase.bucketcache.multi.factor";<a 
name="line.108"></a>
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MEMORY_FACTOR_CONFIG_NAME = "hbase.bucketcache.memory.factor";<a 
name="line.109"></a>
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EXTRA_FREE_FACTOR_CONFIG_NAME = "hbase.bucketcache.extrafreefactor";<a 
name="line.110"></a>
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ACCEPT_FACTOR_CONFIG_NAME = "hbase.bucketcache.acceptfactor";<a 
name="line.111"></a>
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MIN_FACTOR_CONFIG_NAME = "hbase.bucketcache.minfactor";<a name="line.112"></a>
+<span class="sourceLineNo">113</span><a name="line.113"></a>
+<span class="sourceLineNo">114</span>  /** Priority buckets */<a 
name="line.114"></a>
+<span class="sourceLineNo">115</span>  @VisibleForTesting<a 
name="line.115"></a>
+<span class="sourceLineNo">116</span>  static final float DEFAULT_SINGLE_FACTO

<TRUNCATED>

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