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From git-site-r...@apache.org
Subject [38/51] [partial] hbase-site git commit: Published site at .
Date Tue, 15 Aug 2017 15:06:54 GMT
http://git-wip-us.apache.org/repos/asf/hbase-site/blob/07e68d46/devapidocs/src-html/org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.BucketEntry.html
----------------------------------------------------------------------
diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.BucketEntry.html b/devapidocs/src-html/org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.BucketEntry.html
index a614cd4..01801ca 100644
--- a/devapidocs/src-html/org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.BucketEntry.html
+++ b/devapidocs/src-html/org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.BucketEntry.html
@@ -60,520 +60,520 @@
 <span class="sourceLineNo">052</span>import java.util.concurrent.locks.ReentrantLock;<a name="line.52"></a>
 <span class="sourceLineNo">053</span>import java.util.concurrent.locks.ReentrantReadWriteLock;<a name="line.53"></a>
 <span class="sourceLineNo">054</span><a name="line.54"></a>
-<span class="sourceLineNo">055</span>import org.apache.commons.logging.Log;<a name="line.55"></a>
-<span class="sourceLineNo">056</span>import org.apache.commons.logging.LogFactory;<a name="line.56"></a>
-<span class="sourceLineNo">057</span>import org.apache.hadoop.hbase.classification.InterfaceAudience;<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><a name="line.77"></a>
-<span class="sourceLineNo">078</span>import org.apache.hadoop.hbase.shaded.com.google.common.annotations.VisibleForTesting;<a name="line.78"></a>
-<span class="sourceLineNo">079</span>import org.apache.hadoop.hbase.shaded.com.google.common.util.concurrent.ThreadFactoryBuilder;<a name="line.79"></a>
+<span class="sourceLineNo">055</span>import com.google.common.base.Preconditions;<a name="line.55"></a>
+<span class="sourceLineNo">056</span>import org.apache.commons.logging.Log;<a name="line.56"></a>
+<span class="sourceLineNo">057</span>import org.apache.commons.logging.LogFactory;<a name="line.57"></a>
+<span class="sourceLineNo">058</span>import org.apache.hadoop.conf.Configuration;<a name="line.58"></a>
+<span class="sourceLineNo">059</span>import org.apache.hadoop.hbase.HBaseConfiguration;<a name="line.59"></a>
+<span class="sourceLineNo">060</span>import org.apache.hadoop.hbase.classification.InterfaceAudience;<a name="line.60"></a>
+<span class="sourceLineNo">061</span>import org.apache.hadoop.hbase.io.HeapSize;<a name="line.61"></a>
+<span class="sourceLineNo">062</span>import org.apache.hadoop.hbase.io.hfile.BlockCache;<a name="line.62"></a>
+<span class="sourceLineNo">063</span>import org.apache.hadoop.hbase.io.hfile.BlockCacheKey;<a name="line.63"></a>
+<span class="sourceLineNo">064</span>import org.apache.hadoop.hbase.io.hfile.BlockCacheUtil;<a name="line.64"></a>
+<span class="sourceLineNo">065</span>import org.apache.hadoop.hbase.io.hfile.BlockPriority;<a name="line.65"></a>
+<span class="sourceLineNo">066</span>import org.apache.hadoop.hbase.io.hfile.BlockType;<a name="line.66"></a>
+<span class="sourceLineNo">067</span>import org.apache.hadoop.hbase.io.hfile.CacheStats;<a name="line.67"></a>
+<span class="sourceLineNo">068</span>import org.apache.hadoop.hbase.io.hfile.Cacheable;<a name="line.68"></a>
+<span class="sourceLineNo">069</span>import org.apache.hadoop.hbase.io.hfile.Cacheable.MemoryType;<a name="line.69"></a>
+<span class="sourceLineNo">070</span>import org.apache.hadoop.hbase.io.hfile.CacheableDeserializer;<a name="line.70"></a>
+<span class="sourceLineNo">071</span>import org.apache.hadoop.hbase.io.hfile.CacheableDeserializerIdManager;<a name="line.71"></a>
+<span class="sourceLineNo">072</span>import org.apache.hadoop.hbase.io.hfile.CachedBlock;<a name="line.72"></a>
+<span class="sourceLineNo">073</span>import org.apache.hadoop.hbase.io.hfile.HFileBlock;<a name="line.73"></a>
+<span class="sourceLineNo">074</span>import org.apache.hadoop.hbase.nio.ByteBuff;<a name="line.74"></a>
+<span class="sourceLineNo">075</span>import org.apache.hadoop.hbase.util.EnvironmentEdgeManager;<a name="line.75"></a>
+<span class="sourceLineNo">076</span>import org.apache.hadoop.hbase.util.HasThread;<a name="line.76"></a>
+<span class="sourceLineNo">077</span>import org.apache.hadoop.hbase.util.IdReadWriteLock;<a name="line.77"></a>
+<span class="sourceLineNo">078</span>import org.apache.hadoop.hbase.util.IdReadWriteLock.ReferenceType;<a name="line.78"></a>
+<span class="sourceLineNo">079</span>import org.apache.hadoop.util.StringUtils;<a name="line.79"></a>
 <span class="sourceLineNo">080</span><a name="line.80"></a>
-<span class="sourceLineNo">081</span>/**<a name="line.81"></a>
-<span class="sourceLineNo">082</span> * BucketCache uses {@link BucketAllocator} to allocate/free blocks, and uses<a name="line.82"></a>
-<span class="sourceLineNo">083</span> * BucketCache#ramCache and BucketCache#backingMap in order to<a name="line.83"></a>
-<span class="sourceLineNo">084</span> * determine if a given element is in the cache. The bucket cache can use on-heap or<a name="line.84"></a>
-<span class="sourceLineNo">085</span> * off-heap memory {@link ByteBufferIOEngine} or in a file {@link FileIOEngine} to<a name="line.85"></a>
-<span class="sourceLineNo">086</span> * store/read the block data.<a name="line.86"></a>
-<span class="sourceLineNo">087</span> *<a name="line.87"></a>
-<span class="sourceLineNo">088</span> * &lt;p&gt;Eviction is via a similar algorithm as used in<a name="line.88"></a>
-<span class="sourceLineNo">089</span> * {@link org.apache.hadoop.hbase.io.hfile.LruBlockCache}<a name="line.89"></a>
+<span class="sourceLineNo">081</span>import org.apache.hadoop.hbase.shaded.com.google.common.annotations.VisibleForTesting;<a name="line.81"></a>
+<span class="sourceLineNo">082</span>import org.apache.hadoop.hbase.shaded.com.google.common.util.concurrent.ThreadFactoryBuilder;<a name="line.82"></a>
+<span class="sourceLineNo">083</span><a name="line.83"></a>
+<span class="sourceLineNo">084</span>/**<a name="line.84"></a>
+<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>
 <span class="sourceLineNo">090</span> *<a name="line.90"></a>
-<span class="sourceLineNo">091</span> * &lt;p&gt;BucketCache can be used as mainly a block cache (see<a name="line.91"></a>
-<span class="sourceLineNo">092</span> * {@link org.apache.hadoop.hbase.io.hfile.CombinedBlockCache}), combined with<a name="line.92"></a>
-<span class="sourceLineNo">093</span> * LruBlockCache to decrease CMS GC and heap fragmentation.<a name="line.93"></a>
-<span class="sourceLineNo">094</span> *<a name="line.94"></a>
-<span class="sourceLineNo">095</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.95"></a>
-<span class="sourceLineNo">096</span> * blocks) to enlarge cache space via<a name="line.96"></a>
-<span class="sourceLineNo">097</span> * {@link org.apache.hadoop.hbase.io.hfile.LruBlockCache#setVictimCache}<a name="line.97"></a>
-<span class="sourceLineNo">098</span> */<a name="line.98"></a>
-<span class="sourceLineNo">099</span>@InterfaceAudience.Private<a name="line.99"></a>
-<span class="sourceLineNo">100</span>public class BucketCache implements BlockCache, HeapSize {<a name="line.100"></a>
-<span class="sourceLineNo">101</span>  private static final Log LOG = LogFactory.getLog(BucketCache.class);<a name="line.101"></a>
-<span class="sourceLineNo">102</span><a name="line.102"></a>
-<span class="sourceLineNo">103</span>  /** Priority buckets */<a name="line.103"></a>
-<span class="sourceLineNo">104</span>  private static final float DEFAULT_SINGLE_FACTOR = 0.25f;<a name="line.104"></a>
-<span class="sourceLineNo">105</span>  private static final float DEFAULT_MULTI_FACTOR = 0.50f;<a name="line.105"></a>
-<span class="sourceLineNo">106</span>  private static final float DEFAULT_MEMORY_FACTOR = 0.25f;<a name="line.106"></a>
-<span class="sourceLineNo">107</span>  private static final float DEFAULT_EXTRA_FREE_FACTOR = 0.10f;<a name="line.107"></a>
-<span class="sourceLineNo">108</span><a name="line.108"></a>
-<span class="sourceLineNo">109</span>  private static final float DEFAULT_ACCEPT_FACTOR = 0.95f;<a name="line.109"></a>
-<span class="sourceLineNo">110</span>  private static final float DEFAULT_MIN_FACTOR = 0.85f;<a name="line.110"></a>
-<span class="sourceLineNo">111</span><a name="line.111"></a>
-<span class="sourceLineNo">112</span>  // Number of blocks to clear for each of the bucket size that is full<a name="line.112"></a>
-<span class="sourceLineNo">113</span>  private static final int DEFAULT_FREE_ENTIRE_BLOCK_FACTOR = 2;<a name="line.113"></a>
-<span class="sourceLineNo">114</span><a name="line.114"></a>
-<span class="sourceLineNo">115</span>  /** Statistics thread */<a name="line.115"></a>
-<span class="sourceLineNo">116</span>  private static final int statThreadPeriod = 5 * 60;<a name="line.116"></a>
-<span class="sourceLineNo">117</span><a name="line.117"></a>
-<span class="sourceLineNo">118</span>  final static int DEFAULT_WRITER_THREADS = 3;<a name="line.118"></a>
-<span class="sourceLineNo">119</span>  final static int DEFAULT_WRITER_QUEUE_ITEMS = 64;<a name="line.119"></a>
+<span class="sourceLineNo">091</span> * &lt;p&gt;Eviction is via a similar algorithm as used in<a name="line.91"></a>
+<span class="sourceLineNo">092</span> * {@link org.apache.hadoop.hbase.io.hfile.LruBlockCache}<a name="line.92"></a>
+<span class="sourceLineNo">093</span> *<a name="line.93"></a>
+<span class="sourceLineNo">094</span> * &lt;p&gt;BucketCache can be used as mainly a block cache (see<a name="line.94"></a>
+<span class="sourceLineNo">095</span> * {@link org.apache.hadoop.hbase.io.hfile.CombinedBlockCache}), combined with<a name="line.95"></a>
+<span class="sourceLineNo">096</span> * LruBlockCache to decrease CMS GC and heap fragmentation.<a name="line.96"></a>
+<span class="sourceLineNo">097</span> *<a name="line.97"></a>
+<span class="sourceLineNo">098</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.98"></a>
+<span class="sourceLineNo">099</span> * blocks) to enlarge cache space via<a name="line.99"></a>
+<span class="sourceLineNo">100</span> * {@link org.apache.hadoop.hbase.io.hfile.LruBlockCache#setVictimCache}<a name="line.100"></a>
+<span class="sourceLineNo">101</span> */<a name="line.101"></a>
+<span class="sourceLineNo">102</span>@InterfaceAudience.Private<a name="line.102"></a>
+<span class="sourceLineNo">103</span>public class BucketCache implements BlockCache, HeapSize {<a name="line.103"></a>
+<span class="sourceLineNo">104</span>  private static final Log LOG = LogFactory.getLog(BucketCache.class);<a name="line.104"></a>
+<span class="sourceLineNo">105</span><a name="line.105"></a>
+<span class="sourceLineNo">106</span>  /** Priority buckets config */<a name="line.106"></a>
+<span class="sourceLineNo">107</span>  static final String SINGLE_FACTOR_CONFIG_NAME = "hbase.bucketcache.single.factor";<a name="line.107"></a>
+<span class="sourceLineNo">108</span>  static final String MULTI_FACTOR_CONFIG_NAME = "hbase.bucketcache.multi.factor";<a name="line.108"></a>
+<span class="sourceLineNo">109</span>  static final String MEMORY_FACTOR_CONFIG_NAME = "hbase.bucketcache.memory.factor";<a name="line.109"></a>
+<span class="sourceLineNo">110</span>  static final String EXTRA_FREE_FACTOR_CONFIG_NAME = "hbase.bucketcache.extrafreefactor";<a name="line.110"></a>
+<span class="sourceLineNo">111</span>  static final String ACCEPT_FACTOR_CONFIG_NAME = "hbase.bucketcache.acceptfactor";<a name="line.111"></a>
+<span class="sourceLineNo">112</span>  static final String 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_FACTOR = 0.25f;<a name="line.116"></a>
+<span class="sourceLineNo">117</span>  static final float DEFAULT_MULTI_FACTOR = 0.50f;<a name="line.117"></a>
+<span class="sourceLineNo">118</span>  static final float DEFAULT_MEMORY_FACTOR = 0.25f;<a name="line.118"></a>
+<span class="sourceLineNo">119</span>  static final float DEFAULT_MIN_FACTOR = 0.85f;<a name="line.119"></a>
 <span class="sourceLineNo">120</span><a name="line.120"></a>
-<span class="sourceLineNo">121</span>  // Store/read block data<a name="line.121"></a>
-<span class="sourceLineNo">122</span>  final IOEngine ioEngine;<a name="line.122"></a>
+<span class="sourceLineNo">121</span>  private static final float DEFAULT_EXTRA_FREE_FACTOR = 0.10f;<a name="line.121"></a>
+<span class="sourceLineNo">122</span>  private static final float DEFAULT_ACCEPT_FACTOR = 0.95f;<a name="line.122"></a>
 <span class="sourceLineNo">123</span><a name="line.123"></a>
-<span class="sourceLineNo">124</span>  // Store the block in this map before writing it to cache<a name="line.124"></a>
-<span class="sourceLineNo">125</span>  @VisibleForTesting<a name="line.125"></a>
-<span class="sourceLineNo">126</span>  final ConcurrentMap&lt;BlockCacheKey, RAMQueueEntry&gt; ramCache;<a name="line.126"></a>
-<span class="sourceLineNo">127</span>  // In this map, store the block's meta data like offset, length<a name="line.127"></a>
-<span class="sourceLineNo">128</span>  @VisibleForTesting<a name="line.128"></a>
-<span class="sourceLineNo">129</span>  ConcurrentMap&lt;BlockCacheKey, BucketEntry&gt; backingMap;<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>   * Flag if the cache is enabled or not... We shut it off if there are IO<a name="line.132"></a>
-<span class="sourceLineNo">133</span>   * errors for some time, so that Bucket IO exceptions/errors don't bring down<a name="line.133"></a>
-<span class="sourceLineNo">134</span>   * the HBase server.<a name="line.134"></a>
-<span class="sourceLineNo">135</span>   */<a name="line.135"></a>
-<span class="sourceLineNo">136</span>  private volatile boolean cacheEnabled;<a name="line.136"></a>
-<span class="sourceLineNo">137</span><a name="line.137"></a>
-<span class="sourceLineNo">138</span>  /**<a name="line.138"></a>
-<span class="sourceLineNo">139</span>   * A list of writer queues.  We have a queue per {@link WriterThread} we have running.<a name="line.139"></a>
-<span class="sourceLineNo">140</span>   * In other words, the work adding blocks to the BucketCache is divided up amongst the<a name="line.140"></a>
-<span class="sourceLineNo">141</span>   * running WriterThreads.  Its done by taking hash of the cache key modulo queue count.<a name="line.141"></a>
-<span class="sourceLineNo">142</span>   * WriterThread when it runs takes whatever has been recently added and 'drains' the entries<a name="line.142"></a>
-<span class="sourceLineNo">143</span>   * to the BucketCache.  It then updates the ramCache and backingMap accordingly.<a name="line.143"></a>
-<span class="sourceLineNo">144</span>   */<a name="line.144"></a>
-<span class="sourceLineNo">145</span>  @VisibleForTesting<a name="line.145"></a>
-<span class="sourceLineNo">146</span>  final ArrayList&lt;BlockingQueue&lt;RAMQueueEntry&gt;&gt; writerQueues = new ArrayList&lt;&gt;();<a name="line.146"></a>
-<span class="sourceLineNo">147</span>  @VisibleForTesting<a name="line.147"></a>
-<span class="sourceLineNo">148</span>  final WriterThread[] writerThreads;<a name="line.148"></a>
+<span class="sourceLineNo">124</span>  // Number of blocks to clear for each of the bucket size that is full<a name="line.124"></a>
+<span class="sourceLineNo">125</span>  private static final int DEFAULT_FREE_ENTIRE_BLOCK_FACTOR = 2;<a name="line.125"></a>
+<span class="sourceLineNo">126</span><a name="line.126"></a>
+<span class="sourceLineNo">127</span>  /** Statistics thread */<a name="line.127"></a>
+<span class="sourceLineNo">128</span>  private static final int statThreadPeriod = 5 * 60;<a name="line.128"></a>
+<span class="sourceLineNo">129</span><a name="line.129"></a>
+<span class="sourceLineNo">130</span>  final static int DEFAULT_WRITER_THREADS = 3;<a name="line.130"></a>
+<span class="sourceLineNo">131</span>  final static int DEFAULT_WRITER_QUEUE_ITEMS = 64;<a name="line.131"></a>
+<span class="sourceLineNo">132</span><a name="line.132"></a>
+<span class="sourceLineNo">133</span>  // Store/read block data<a name="line.133"></a>
+<span class="sourceLineNo">134</span>  final IOEngine ioEngine;<a name="line.134"></a>
+<span class="sourceLineNo">135</span><a name="line.135"></a>
+<span class="sourceLineNo">136</span>  // Store the block in this map before writing it to cache<a name="line.136"></a>
+<span class="sourceLineNo">137</span>  @VisibleForTesting<a name="line.137"></a>
+<span class="sourceLineNo">138</span>  final ConcurrentMap&lt;BlockCacheKey, RAMQueueEntry&gt; ramCache;<a name="line.138"></a>
+<span class="sourceLineNo">139</span>  // In this map, store the block's meta data like offset, length<a name="line.139"></a>
+<span class="sourceLineNo">140</span>  @VisibleForTesting<a name="line.140"></a>
+<span class="sourceLineNo">141</span>  ConcurrentMap&lt;BlockCacheKey, BucketEntry&gt; backingMap;<a name="line.141"></a>
+<span class="sourceLineNo">142</span><a name="line.142"></a>
+<span class="sourceLineNo">143</span>  /**<a name="line.143"></a>
+<span class="sourceLineNo">144</span>   * Flag if the cache is enabled or not... We shut it off if there are IO<a name="line.144"></a>
+<span class="sourceLineNo">145</span>   * errors for some time, so that Bucket IO exceptions/errors don't bring down<a name="line.145"></a>
+<span class="sourceLineNo">146</span>   * the HBase server.<a name="line.146"></a>
+<span class="sourceLineNo">147</span>   */<a name="line.147"></a>
+<span class="sourceLineNo">148</span>  private volatile boolean cacheEnabled;<a name="line.148"></a>
 <span class="sourceLineNo">149</span><a name="line.149"></a>
-<span class="sourceLineNo">150</span>  /** Volatile boolean to track if free space is in process or not */<a name="line.150"></a>
-<span class="sourceLineNo">151</span>  private volatile boolean freeInProgress = false;<a name="line.151"></a>
-<span class="sourceLineNo">152</span>  private final Lock freeSpaceLock = new ReentrantLock();<a name="line.152"></a>
-<span class="sourceLineNo">153</span><a name="line.153"></a>
-<span class="sourceLineNo">154</span>  private UniqueIndexMap&lt;Integer&gt; deserialiserMap = new UniqueIndexMap&lt;&gt;();<a name="line.154"></a>
-<span class="sourceLineNo">155</span><a name="line.155"></a>
-<span class="sourceLineNo">156</span>  private final AtomicLong realCacheSize = new AtomicLong(0);<a name="line.156"></a>
-<span class="sourceLineNo">157</span>  private final AtomicLong heapSize = new AtomicLong(0);<a name="line.157"></a>
-<span class="sourceLineNo">158</span>  /** Current number of cached elements */<a name="line.158"></a>
-<span class="sourceLineNo">159</span>  private final AtomicLong blockNumber = new AtomicLong(0);<a name="line.159"></a>
-<span class="sourceLineNo">160</span><a name="line.160"></a>
-<span class="sourceLineNo">161</span>  /** Cache access count (sequential ID) */<a name="line.161"></a>
-<span class="sourceLineNo">162</span>  private final AtomicLong accessCount = new AtomicLong(0);<a name="line.162"></a>
-<span class="sourceLineNo">163</span><a name="line.163"></a>
-<span class="sourceLineNo">164</span>  private static final int DEFAULT_CACHE_WAIT_TIME = 50;<a name="line.164"></a>
-<span class="sourceLineNo">165</span>  // Used in test now. If the flag is false and the cache speed is very fast,<a name="line.165"></a>
-<span class="sourceLineNo">166</span>  // bucket cache will skip some blocks when caching. If the flag is true, we<a name="line.166"></a>
-<span class="sourceLineNo">167</span>  // will wait blocks flushed to IOEngine for some time when caching<a name="line.167"></a>
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+<span class="sourceLineNo">259</span>                     Configuration conf)<a name="line.259"></a>
+<span class="sourceLineNo">260</span>      throws FileNotFoundException, IOException {<a name="line.260"></a>
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+<span class="sourceLineNo">265</span>      // Enough for about 32TB of cache!<a name="line.265"></a>
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+<span class="sourceLineNo">280</span>        ", memoryFactor: " + memoryFactor);<a name="line.280"></a>
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+<span class="sourceLineNo">286</span><a name="line.286"></a>
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+<span class="sourceLineNo">291</span><a name="line.291"></a>
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-<span class="sourceLineNo">319</span>      // In order to make the usage simple, we only need the prefix 'files:' in<a name="line.319"></a>
-<span class="sourceLineNo">320</span>      // document whether one or multiple file(s), but also support 'file:' for<a name="line.320"></a>
-<span class="sourceLineNo">321</span>      // the compatibility<a name="line.321"></a>
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-<span class="sourceLineNo">323</span>          .split(FileIOEngine.FILE_DELIMITER);<a name="line.323"></a>
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-<span class="sourceLineNo">331</span>    } else {<a name="line.331"></a>
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-<span class="sourceLineNo">347</span>  /**<a name="line.347"></a>
-<span class="sourceLineNo">348</span>   * Cache the block with the specified name and buffer.<a name="line.348"></a>
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-<span class="sourceLineNo">357</span>    cacheBlockWithWait(cacheKey, cachedItem, inMemory, wait_when_cache);<a name="line.357"></a>
+<span class="sourceLineNo">295</span>    this.backingMap = new ConcurrentHashMap&lt;&gt;((int) blockNumCapacity);<a name="line.295"></a>
+<span class="sourceLineNo">296</span><a name="line.296"></a>
+<span class="sourceLineNo">297</span>    if (ioEngine.isPersistent() &amp;&amp; persistencePath != null) {<a name="line.297"></a>
+<span class="sourceLineNo">298</span>      try {<a name="line.298"></a>
+<span class="sourceLineNo">299</span>        retrieveFromFile(bucketSizes);<a name="line.299"></a>
+<span class="sourceLineNo">300</span>      } catch (IOException ioex) {<a name="line.300"></a>
+<span class="sourceLineNo">301</span>        LOG.error("Can't restore from file because of", ioex);<a name="line.301"></a>
+<span class="sourceLineNo">302</span>      } catch (ClassNotFoundException cnfe) {<a name="line.302"></a>
+<span class="sourceLineNo">303</span>        LOG.error("Can't restore from file in rebuild because can't deserialise",cnfe);<a name="line.303"></a>
+<span class="sourceLineNo">304</span>        throw new RuntimeException(cnfe);<a name="line.304"></a>
+<span class="sourceLineNo">305</span>      }<a name="line.305"></a>
+<span class="sourceLineNo">306</span>    }<a name="line.306"></a>
+<span class="sourceLineNo">307</span>    final String threadName = Thread.currentThread().getName();<a name="line.307"></a>
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+<span class="sourceLineNo">310</span>      writerThreads[i] = new WriterThread(writerQueues.get(i));<a name="line.310"></a>
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+<span class="sourceLineNo">312</span>      writerThreads[i].setDaemon(true);<a name="line.312"></a>
+<span class="sourceLineNo">313</span>    }<a name="line.313"></a>
+<span class="sourceLineNo">314</span>    startWriterThreads();<a name="line.314"></a>
+<span class="sourceLineNo">315</span><a name="line.315"></a>
+<span class="sourceLineNo">316</span>    // Run the statistics thread periodically to print the cache statistics log<a name="line.316"></a>
+<span class="sourceLineNo">317</span>    // TODO: Add means of turning this off.  Bit obnoxious running thread just to make a log<a name="line.317"></a>
+<span class="sourceLineNo">318</span>    // every five minutes.<a name="line.318"></a>
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+<span class="sourceLineNo">320</span>        statThreadPeriod, statThreadPeriod, TimeUnit.SECONDS);<a name="line.320"></a>
+<span class="sourceLineNo">321</span>    LOG.info("Started bucket cache; ioengine=" + ioEngineName +<a name="line.321"></a>
+<span class="sourceLineNo">322</span>        ", capacity=" + StringUtils.byteDesc(capacity) +<a name="line.322"></a>
+<span class="sourceLineNo">323</span>      ", blockSize=" + StringUtils.byteDesc(blockSize) + ", writerThreadNum=" +<a name="line.323"></a>
+<span class="sourceLineNo">324</span>        writerThreadNum + ", writerQLen=" + writerQLen + ", persistencePath=" +<a name="line.324"></a>
+<span class="sourceLineNo">325</span>      persistencePath + ", bucketAllocator=" + this.bucketAllocator.getClass().getName());<a name="line.325"></a>
+<span class="sourceLineNo">326</span>  }<a name="line.326"></a>
+<span class="sourceLineNo">327</span><a name="line.327"></a>
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+<span class="sourceLineNo">330</span>    Preconditions.checkArgument(minFactor &lt;= 1 &amp;&amp; minFactor &gt;= 0, MIN_FACTOR_CONFIG_NAME + " must be between 0.0 and 1.0");<a name="line.330"></a>
+<span class="sourceLineNo">331</span>    Preconditions.checkArgument(minFactor &lt;= acceptableFactor, MIN_FACTOR_CONFIG_NAME + " must be &lt;= " + ACCEPT_FACTOR_CONFIG_NAME);<a name="line.331"></a>
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+<span class="sourceLineNo">363</span><a name="line.363"></a>
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+<span class="sourceLineNo">375</span>      // In order to make the usage simple, we only need the prefix 'files:' in<a name="line.375"></a>
+<span class="sourceLineNo">376</span>      // document whether one or multiple file(s), but also support 'file:' for<a name="line.376"></a>
+<span class="sourceLineNo">377</span>      // the compatibility<a name="line.377"></a>
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+<span class="sourceLineNo">392</span><a name="line.392"></a>
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+<span class="sou

<TRUNCATED>

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