hbase-commits mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From git-site-r...@apache.org
Subject [19/51] [partial] hbase-site git commit: Published site at 613d831429960348dc42c3bdb6ea5d31be15c81c.
Date Thu, 02 Aug 2018 19:52:05 GMT
http://git-wip-us.apache.org/repos/asf/hbase-site/blob/7cf6034b/devapidocs/src-html/org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.BucketEntryGroup.html
----------------------------------------------------------------------
diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.BucketEntryGroup.html b/devapidocs/src-html/org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.BucketEntryGroup.html
index bd3c59e..21e240a 100644
--- a/devapidocs/src-html/org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.BucketEntryGroup.html
+++ b/devapidocs/src-html/org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.BucketEntryGroup.html
@@ -33,62 +33,62 @@
 <span class="sourceLineNo">025</span>import java.io.FileNotFoundException;<a name="line.25"></a>
 <span class="sourceLineNo">026</span>import java.io.FileOutputStream;<a name="line.26"></a>
 <span class="sourceLineNo">027</span>import java.io.IOException;<a name="line.27"></a>
-<span class="sourceLineNo">028</span>import java.io.ObjectInputStream;<a name="line.28"></a>
-<span class="sourceLineNo">029</span>import java.io.ObjectOutputStream;<a name="line.29"></a>
-<span class="sourceLineNo">030</span>import java.io.Serializable;<a name="line.30"></a>
-<span class="sourceLineNo">031</span>import java.nio.ByteBuffer;<a name="line.31"></a>
-<span class="sourceLineNo">032</span>import java.util.ArrayList;<a name="line.32"></a>
-<span class="sourceLineNo">033</span>import java.util.Comparator;<a name="line.33"></a>
-<span class="sourceLineNo">034</span>import java.util.HashSet;<a name="line.34"></a>
-<span class="sourceLineNo">035</span>import java.util.Iterator;<a name="line.35"></a>
-<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.PriorityQueue;<a name="line.39"></a>
-<span class="sourceLineNo">040</span>import java.util.Set;<a name="line.40"></a>
-<span class="sourceLineNo">041</span>import java.util.concurrent.ArrayBlockingQueue;<a name="line.41"></a>
-<span class="sourceLineNo">042</span>import java.util.concurrent.BlockingQueue;<a name="line.42"></a>
-<span class="sourceLineNo">043</span>import java.util.concurrent.ConcurrentHashMap;<a name="line.43"></a>
-<span class="sourceLineNo">044</span>import java.util.concurrent.ConcurrentMap;<a name="line.44"></a>
-<span class="sourceLineNo">045</span>import java.util.concurrent.ConcurrentSkipListSet;<a name="line.45"></a>
-<span class="sourceLineNo">046</span>import java.util.concurrent.Executors;<a name="line.46"></a>
-<span class="sourceLineNo">047</span>import java.util.concurrent.ScheduledExecutorService;<a name="line.47"></a>
-<span class="sourceLineNo">048</span>import java.util.concurrent.TimeUnit;<a name="line.48"></a>
-<span class="sourceLineNo">049</span>import java.util.concurrent.atomic.AtomicInteger;<a name="line.49"></a>
-<span class="sourceLineNo">050</span>import java.util.concurrent.atomic.AtomicLong;<a name="line.50"></a>
-<span class="sourceLineNo">051</span>import java.util.concurrent.atomic.LongAdder;<a name="line.51"></a>
-<span class="sourceLineNo">052</span>import java.util.concurrent.locks.Lock;<a name="line.52"></a>
-<span class="sourceLineNo">053</span>import java.util.concurrent.locks.ReentrantLock;<a name="line.53"></a>
-<span class="sourceLineNo">054</span>import java.util.concurrent.locks.ReentrantReadWriteLock;<a name="line.54"></a>
-<span class="sourceLineNo">055</span>import org.apache.hadoop.conf.Configuration;<a name="line.55"></a>
-<span class="sourceLineNo">056</span>import org.apache.hadoop.hbase.HBaseConfiguration;<a name="line.56"></a>
-<span class="sourceLineNo">057</span>import org.apache.hadoop.hbase.io.HeapSize;<a name="line.57"></a>
-<span class="sourceLineNo">058</span>import org.apache.hadoop.hbase.io.hfile.BlockCache;<a name="line.58"></a>
-<span class="sourceLineNo">059</span>import org.apache.hadoop.hbase.io.hfile.BlockCacheKey;<a name="line.59"></a>
-<span class="sourceLineNo">060</span>import org.apache.hadoop.hbase.io.hfile.BlockCacheUtil;<a name="line.60"></a>
-<span class="sourceLineNo">061</span>import org.apache.hadoop.hbase.io.hfile.BlockPriority;<a name="line.61"></a>
-<span class="sourceLineNo">062</span>import org.apache.hadoop.hbase.io.hfile.BlockType;<a name="line.62"></a>
-<span class="sourceLineNo">063</span>import org.apache.hadoop.hbase.io.hfile.CacheStats;<a name="line.63"></a>
-<span class="sourceLineNo">064</span>import org.apache.hadoop.hbase.io.hfile.Cacheable;<a name="line.64"></a>
-<span class="sourceLineNo">065</span>import org.apache.hadoop.hbase.io.hfile.Cacheable.MemoryType;<a name="line.65"></a>
-<span class="sourceLineNo">066</span>import org.apache.hadoop.hbase.io.hfile.CacheableDeserializer;<a name="line.66"></a>
-<span class="sourceLineNo">067</span>import org.apache.hadoop.hbase.io.hfile.CacheableDeserializerIdManager;<a name="line.67"></a>
-<span class="sourceLineNo">068</span>import org.apache.hadoop.hbase.io.hfile.CachedBlock;<a name="line.68"></a>
-<span class="sourceLineNo">069</span>import org.apache.hadoop.hbase.io.hfile.HFileBlock;<a name="line.69"></a>
-<span class="sourceLineNo">070</span>import org.apache.hadoop.hbase.nio.ByteBuff;<a name="line.70"></a>
-<span class="sourceLineNo">071</span>import org.apache.hadoop.hbase.util.EnvironmentEdgeManager;<a name="line.71"></a>
-<span class="sourceLineNo">072</span>import org.apache.hadoop.hbase.util.HasThread;<a name="line.72"></a>
-<span class="sourceLineNo">073</span>import org.apache.hadoop.hbase.util.IdReadWriteLock;<a name="line.73"></a>
-<span class="sourceLineNo">074</span>import org.apache.hadoop.hbase.util.IdReadWriteLock.ReferenceType;<a name="line.74"></a>
-<span class="sourceLineNo">075</span>import org.apache.hadoop.hbase.util.UnsafeAvailChecker;<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">028</span>import java.io.Serializable;<a name="line.28"></a>
+<span class="sourceLineNo">029</span>import java.nio.ByteBuffer;<a name="line.29"></a>
+<span class="sourceLineNo">030</span>import java.util.ArrayList;<a name="line.30"></a>
+<span class="sourceLineNo">031</span>import java.util.Comparator;<a name="line.31"></a>
+<span class="sourceLineNo">032</span>import java.util.HashSet;<a name="line.32"></a>
+<span class="sourceLineNo">033</span>import java.util.Iterator;<a name="line.33"></a>
+<span class="sourceLineNo">034</span>import java.util.List;<a name="line.34"></a>
+<span class="sourceLineNo">035</span>import java.util.Map;<a name="line.35"></a>
+<span class="sourceLineNo">036</span>import java.util.NavigableSet;<a name="line.36"></a>
+<span class="sourceLineNo">037</span>import java.util.PriorityQueue;<a name="line.37"></a>
+<span class="sourceLineNo">038</span>import java.util.Set;<a name="line.38"></a>
+<span class="sourceLineNo">039</span>import java.util.concurrent.ArrayBlockingQueue;<a name="line.39"></a>
+<span class="sourceLineNo">040</span>import java.util.concurrent.BlockingQueue;<a name="line.40"></a>
+<span class="sourceLineNo">041</span>import java.util.concurrent.ConcurrentHashMap;<a name="line.41"></a>
+<span class="sourceLineNo">042</span>import java.util.concurrent.ConcurrentMap;<a name="line.42"></a>
+<span class="sourceLineNo">043</span>import java.util.concurrent.ConcurrentSkipListSet;<a name="line.43"></a>
+<span class="sourceLineNo">044</span>import java.util.concurrent.Executors;<a name="line.44"></a>
+<span class="sourceLineNo">045</span>import java.util.concurrent.ScheduledExecutorService;<a name="line.45"></a>
+<span class="sourceLineNo">046</span>import java.util.concurrent.TimeUnit;<a name="line.46"></a>
+<span class="sourceLineNo">047</span>import java.util.concurrent.atomic.AtomicInteger;<a name="line.47"></a>
+<span class="sourceLineNo">048</span>import java.util.concurrent.atomic.AtomicLong;<a name="line.48"></a>
+<span class="sourceLineNo">049</span>import java.util.concurrent.atomic.LongAdder;<a name="line.49"></a>
+<span class="sourceLineNo">050</span>import java.util.concurrent.locks.Lock;<a name="line.50"></a>
+<span class="sourceLineNo">051</span>import java.util.concurrent.locks.ReentrantLock;<a name="line.51"></a>
+<span class="sourceLineNo">052</span>import java.util.concurrent.locks.ReentrantReadWriteLock;<a name="line.52"></a>
+<span class="sourceLineNo">053</span>import org.apache.hadoop.conf.Configuration;<a name="line.53"></a>
+<span class="sourceLineNo">054</span>import org.apache.hadoop.hbase.HBaseConfiguration;<a name="line.54"></a>
+<span class="sourceLineNo">055</span>import org.apache.hadoop.hbase.io.HeapSize;<a name="line.55"></a>
+<span class="sourceLineNo">056</span>import org.apache.hadoop.hbase.io.hfile.BlockCache;<a name="line.56"></a>
+<span class="sourceLineNo">057</span>import org.apache.hadoop.hbase.io.hfile.BlockCacheKey;<a name="line.57"></a>
+<span class="sourceLineNo">058</span>import org.apache.hadoop.hbase.io.hfile.BlockCacheUtil;<a name="line.58"></a>
+<span class="sourceLineNo">059</span>import org.apache.hadoop.hbase.io.hfile.BlockPriority;<a name="line.59"></a>
+<span class="sourceLineNo">060</span>import org.apache.hadoop.hbase.io.hfile.BlockType;<a name="line.60"></a>
+<span class="sourceLineNo">061</span>import org.apache.hadoop.hbase.io.hfile.CacheStats;<a name="line.61"></a>
+<span class="sourceLineNo">062</span>import org.apache.hadoop.hbase.io.hfile.Cacheable;<a name="line.62"></a>
+<span class="sourceLineNo">063</span>import org.apache.hadoop.hbase.io.hfile.Cacheable.MemoryType;<a name="line.63"></a>
+<span class="sourceLineNo">064</span>import org.apache.hadoop.hbase.io.hfile.CacheableDeserializer;<a name="line.64"></a>
+<span class="sourceLineNo">065</span>import org.apache.hadoop.hbase.io.hfile.CacheableDeserializerIdManager;<a name="line.65"></a>
+<span class="sourceLineNo">066</span>import org.apache.hadoop.hbase.io.hfile.CachedBlock;<a name="line.66"></a>
+<span class="sourceLineNo">067</span>import org.apache.hadoop.hbase.io.hfile.HFileBlock;<a name="line.67"></a>
+<span class="sourceLineNo">068</span>import org.apache.hadoop.hbase.nio.ByteBuff;<a name="line.68"></a>
+<span class="sourceLineNo">069</span>import org.apache.hadoop.hbase.protobuf.ProtobufMagic;<a name="line.69"></a>
+<span class="sourceLineNo">070</span>import org.apache.hadoop.hbase.util.EnvironmentEdgeManager;<a name="line.70"></a>
+<span class="sourceLineNo">071</span>import org.apache.hadoop.hbase.util.HasThread;<a name="line.71"></a>
+<span class="sourceLineNo">072</span>import org.apache.hadoop.hbase.util.IdReadWriteLock;<a name="line.72"></a>
+<span class="sourceLineNo">073</span>import org.apache.hadoop.hbase.util.IdReadWriteLock.ReferenceType;<a name="line.73"></a>
+<span class="sourceLineNo">074</span>import org.apache.hadoop.hbase.util.UnsafeAvailChecker;<a name="line.74"></a>
+<span class="sourceLineNo">075</span>import org.apache.hadoop.util.StringUtils;<a name="line.75"></a>
+<span class="sourceLineNo">076</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.76"></a>
+<span class="sourceLineNo">077</span>import org.slf4j.Logger;<a name="line.77"></a>
+<span class="sourceLineNo">078</span>import org.slf4j.LoggerFactory;<a name="line.78"></a>
+<span class="sourceLineNo">079</span><a name="line.79"></a>
+<span class="sourceLineNo">080</span>import org.apache.hbase.thirdparty.com.google.common.annotations.VisibleForTesting;<a name="line.80"></a>
+<span class="sourceLineNo">081</span>import org.apache.hbase.thirdparty.com.google.common.base.Preconditions;<a name="line.81"></a>
+<span class="sourceLineNo">082</span>import org.apache.hbase.thirdparty.com.google.common.util.concurrent.ThreadFactoryBuilder;<a name="line.82"></a>
+<span class="sourceLineNo">083</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.BucketCacheProtos;<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>
@@ -172,1540 +172,1557 @@
 <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">167</span>  private final LongAdder realCacheSize = new LongAdder();<a name="line.167"></a>
+<span class="sourceLineNo">168</span>  private final LongAdder heapSize = new LongAdder();<a name="line.168"></a>
+<span class="sourceLineNo">169</span>  /** Current number of cached elements */<a name="line.169"></a>
+<span class="sourceLineNo">170</span>  private final LongAdder blockNumber = new LongAdder();<a name="line.170"></a>
+<span class="sourceLineNo">171</span><a name="line.171"></a>
+<span class="sourceLineNo">172</span>  /** Cache access count (sequential ID) */<a name="line.172"></a>
+<span class="sourceLineNo">173</span>  private final AtomicLong accessCount = new AtomicLong();<a name="line.173"></a>
+<span class="sourceLineNo">174</span><a name="line.174"></a>
+<span class="sourceLineNo">175</span>  private static final int DEFAULT_CACHE_WAIT_TIME = 50;<a name="line.175"></a>
+<span class="sourceLineNo">176</span>  // Used in test now. If the flag is false and the cache speed is very fast,<a name="line.176"></a>
+<span class="sourceLineNo">177</span>  // bucket cache will skip some blocks when caching. If the flag is true, we<a name="line.177"></a>
+<span class="sourceLineNo">178</span>  // will wait blocks flushed to IOEngine for some time when caching<a name="line.178"></a>
+<span class="sourceLineNo">179</span>  boolean wait_when_cache = false;<a name="line.179"></a>
+<span class="sourceLineNo">180</span><a name="line.180"></a>
+<span class="sourceLineNo">181</span>  private final BucketCacheStats cacheStats = new BucketCacheStats();<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>
-<span class="sourceLineNo">215</span>          }<a name="line.215"></a>
-<span class="sourceLineNo">216</span><a name="line.216"></a>
-<span class="sourceLineNo">217</span>          if (a.getOffset() == b.getOffset()) {<a name="line.217"></a>
-<span class="sourceLineNo">218</span>            return 0;<a 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>
-<span class="sourceLineNo">224</span>      });<a name="line.224"></a>
-<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>
-<span class="sourceLineNo">246</span>  private float multiFactor;<a name="line.246"></a>
-<span class="sourceLineNo">247</span><a name="line.247"></a>
-<span class="sourceLineNo">248</span>  /** In-memory bucket size */<a name="line.248"></a>
-<span class="sourceLineNo">249</span>  private float memoryFactor;<a name="line.249"></a>
-<span class="sourceLineNo">250</span><a name="line.250"></a>
-<span class="sourceLineNo">251</span>  public BucketCache(String ioEngineName, long capacity, int blockSize, int[] bucketSizes,<a name="line.251"></a>
-<span class="sourceLineNo">252</span>      int writerThreadNum, int writerQLen, String persistencePath) throws FileNotFoundException,<a name="line.252"></a>
-<span class="sourceLineNo">253</span>      IOException {<a name="line.253"></a>
-<span class="sourceLineNo">254</span>    this(ioEngineName, capacity, blockSize, bucketSizes, writerThreadNum, writerQLen,<a name="line.254"></a>
-<span class="sourceLineNo">255</span>      persistencePath, DEFAULT_ERROR_TOLERATION_DURATION, HBaseConfiguration.create());<a name="line.255"></a>
-<span class="sourceLineNo">256</span>  }<a name="line.256"></a>
-<span class="sourceLineNo">257</span><a name="line.257"></a>
-<span class="sourceLineNo">258</span>  public BucketCache(String ioEngineName, long capacity, int blockSize, int[] bucketSizes,<a name="line.258"></a>
-<span class="sourceLineNo">259</span>                     int writerThreadNum, int writerQLen, String persistencePath, int ioErrorsTolerationDuration,<a name="line.259"></a>
-<span class="sourceLineNo">260</span>                     Configuration conf)<a name="line.260"></a>
-<span class="sourceLineNo">261</span>      throws FileNotFoundException, IOException {<a name="line.261"></a>
-<span class="sourceLineNo">262</span>    this.ioEngine = getIOEngineFromName(ioEngineName, capacity, persistencePath);<a name="line.262"></a>
-<span class="sourceLineNo">263</span>    this.writerThreads = new WriterThread[writerThreadNum];<a name="line.263"></a>
-<span class="sourceLineNo">264</span>    long blockNumCapacity = capacity / blockSize;<a name="line.264"></a>
-<span class="sourceLineNo">265</span>    if (blockNumCapacity &gt;= Integer.MAX_VALUE) {<a name="line.265"></a>
-<span class="sourceLineNo">266</span>      // Enough for about 32TB of cache!<a name="line.266"></a>
-<span class="sourceLineNo">267</span>      throw new IllegalArgumentException("Cache capacity is too large, only support 32TB now");<a name="line.267"></a>
-<span class="sourceLineNo">268</span>    }<a name="line.268"></a>
-<span class="sourceLineNo">269</span><a name="line.269"></a>
-<span class="sourceLineNo">270</span>    this.acceptableFactor = conf.getFloat(ACCEPT_FACTOR_CONFIG_NAME, DEFAULT_ACCEPT_FACTOR);<a name="line.270"></a>
-<span class="sourceLineNo">271</span>    this.minFactor = conf.getFloat(MIN_FACTOR_CONFIG_NAME, DEFAULT_MIN_FACTOR);<a name="line.271"></a>
-<span class="sourceLineNo">272</span>    this.extraFreeFactor = conf.getFloat(EXTRA_FREE_FACTOR_CONFIG_NAME, DEFAULT_EXTRA_FREE_FACTOR);<a name="line.272"></a>
-<span class="sourceLineNo">273</span>    this.singleFactor = conf.getFloat(SINGLE_FACTOR_CONFIG_NAME, DEFAULT_SINGLE_FACTOR);<a name="line.273"></a>
-<span class="sourceLineNo">274</span>    this.multiFactor = conf.getFloat(MULTI_FACTOR_CONFIG_NAME, DEFAULT_MULTI_FACTOR);<a name="line.274"></a>
-<span class="sourceLineNo">275</span>    this.memoryFactor = conf.getFloat(MEMORY_FACTOR_CONFIG_NAME, DEFAULT_MEMORY_FACTOR);<a name="line.275"></a>
+<span class="sourceLineNo">183</span>  private final String persistencePath;<a name="line.183"></a>
+<span class="sourceLineNo">184</span>  private final long cacheCapacity;<a name="line.184"></a>
+<span class="sourceLineNo">185</span>  /** Approximate block size */<a name="line.185"></a>
+<span class="sourceLineNo">186</span>  private final long blockSize;<a name="line.186"></a>
+<span class="sourceLineNo">187</span><a name="line.187"></a>
+<span class="sourceLineNo">188</span>  /** Duration of IO errors tolerated before we disable cache, 1 min as default */<a name="line.188"></a>
+<span class="sourceLineNo">189</span>  private final int ioErrorsTolerationDuration;<a name="line.189"></a>
+<span class="sourceLineNo">190</span>  // 1 min<a name="line.190"></a>
+<span class="sourceLineNo">191</span>  public static final int DEFAULT_ERROR_TOLERATION_DURATION = 60 * 1000;<a name="line.191"></a>
+<span class="sourceLineNo">192</span><a name="line.192"></a>
+<span class="sourceLineNo">193</span>  // Start time of first IO error when reading or writing IO Engine, it will be<a name="line.193"></a>
+<span class="sourceLineNo">194</span>  // reset after a successful read/write.<a name="line.194"></a>
+<span class="sourceLineNo">195</span>  private volatile long ioErrorStartTime = -1;<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 ReentrantReadWriteLock to lock on a particular block identified by offset.<a name="line.198"></a>
+<span class="sourceLineNo">199</span>   * The purpose of this is to avoid freeing the block which is being read.<a name="line.199"></a>
+<span class="sourceLineNo">200</span>   * &lt;p&gt;<a name="line.200"></a>
+<span class="sourceLineNo">201</span>   * Key set of offsets in BucketCache is limited so soft reference is the best choice here.<a name="line.201"></a>
+<span class="sourceLineNo">202</span>   */<a name="line.202"></a>
+<span class="sourceLineNo">203</span>  @VisibleForTesting<a name="line.203"></a>
+<span class="sourceLineNo">204</span>  final IdReadWriteLock offsetLock = new IdReadWriteLock(ReferenceType.SOFT);<a name="line.204"></a>
+<span class="sourceLineNo">205</span><a name="line.205"></a>
+<span class="sourceLineNo">206</span>  private final NavigableSet&lt;BlockCacheKey&gt; blocksByHFile =<a name="line.206"></a>
+<span class="sourceLineNo">207</span>      new ConcurrentSkipListSet&lt;&gt;(new Comparator&lt;BlockCacheKey&gt;() {<a name="line.207"></a>
+<span class="sourceLineNo">208</span>        @Override<a name="line.208"></a>
+<span class="sourceLineNo">209</span>        public int compare(BlockCacheKey a, BlockCacheKey b) {<a name="line.209"></a>
+<span class="sourceLineNo">210</span>          int nameComparison = a.getHfileName().compareTo(b.getHfileName());<a name="line.210"></a>
+<span class="sourceLineNo">211</span>          if (nameComparison != 0) {<a name="line.211"></a>
+<span class="sourceLineNo">212</span>            return nameComparison;<a name="line.212"></a>
+<span class="sourceLineNo">213</span>          }<a name="line.213"></a>
+<span class="sourceLineNo">214</span><a name="line.214"></a>
+<span class="sourceLineNo">215</span>          if (a.getOffset() == b.getOffset()) {<a name="line.215"></a>
+<span class="sourceLineNo">216</span>            return 0;<a name="line.216"></a>
+<span class="sourceLineNo">217</span>          } else if (a.getOffset() &lt; b.getOffset()) {<a name="line.217"></a>
+<span class="sourceLineNo">218</span>            return -1;<a name="line.218"></a>
+<span class="sourceLineNo">219</span>          }<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>      });<a name="line.222"></a>
+<span class="sourceLineNo">223</span><a name="line.223"></a>
+<span class="sourceLineNo">224</span>  /** Statistics thread schedule pool (for heavy debugging, could remove) */<a name="line.224"></a>
+<span class="sourceLineNo">225</span>  private final ScheduledExecutorService scheduleThreadPool = Executors.newScheduledThreadPool(1,<a name="line.225"></a>
+<span class="sourceLineNo">226</span>    new ThreadFactoryBuilder().setNameFormat("BucketCacheStatsExecutor").setDaemon(true).build());<a name="line.226"></a>
+<span class="sourceLineNo">227</span><a name="line.227"></a>
+<span class="sourceLineNo">228</span>  // Allocate or free space for the block<a name="line.228"></a>
+<span class="sourceLineNo">229</span>  private BucketAllocator bucketAllocator;<a name="line.229"></a>
+<span class="sourceLineNo">230</span><a name="line.230"></a>
+<span class="sourceLineNo">231</span>  /** Acceptable size of cache (no evictions if size &lt; acceptable) */<a name="line.231"></a>
+<span class="sourceLineNo">232</span>  private float acceptableFactor;<a name="line.232"></a>
+<span class="sourceLineNo">233</span><a name="line.233"></a>
+<span class="sourceLineNo">234</span>  /** Minimum threshold of cache (when evicting, evict until size &lt; min) */<a name="line.234"></a>
+<span class="sourceLineNo">235</span>  private float minFactor;<a name="line.235"></a>
+<span class="sourceLineNo">236</span><a name="line.236"></a>
+<span class="sourceLineNo">237</span>  /** Free this floating point factor of extra blocks when evicting. For example free the number of blocks requested * (1 + extraFreeFactor) */<a name="line.237"></a>
+<span class="sourceLineNo">238</span>  private float extraFreeFactor;<a name="line.238"></a>
+<span class="sourceLineNo">239</span><a name="line.239"></a>
+<span class="sourceLineNo">240</span>  /** Single access bucket size */<a name="line.240"></a>
+<span class="sourceLineNo">241</span>  private float singleFactor;<a name="line.241"></a>
+<span class="sourceLineNo">242</span><a name="line.242"></a>
+<span class="sourceLineNo">243</span>  /** Multiple access bucket size */<a name="line.243"></a>
+<span class="sourceLineNo">244</span>  private float multiFactor;<a name="line.244"></a>
+<span class="sourceLineNo">245</span><a name="line.245"></a>
+<span class="sourceLineNo">246</span>  /** In-memory bucket size */<a name="line.246"></a>
+<span class="sourceLineNo">247</span>  private float memoryFactor;<a name="line.247"></a>
+<span class="sourceLineNo">248</span><a name="line.248"></a>
+<span class="sourceLineNo">249</span>  public BucketCache(String ioEngineName, long capacity, int blockSize, int[] bucketSizes,<a name="line.249"></a>
+<span class="sourceLineNo">250</span>      int writerThreadNum, int writerQLen, String persistencePath) throws FileNotFoundException,<a name="line.250"></a>
+<span class="sourceLineNo">251</span>      IOException {<a name="line.251"></a>
+<span class="sourceLineNo">252</span>    this(ioEngineName, capacity, blockSize, bucketSizes, writerThreadNum, writerQLen,<a name="line.252"></a>
+<span class="sourceLineNo">253</span>      persistencePath, DEFAULT_ERROR_TOLERATION_DURATION, HBaseConfiguration.create());<a name="line.253"></a>
+<span class="sourceLineNo">254</span>  }<a name="line.254"></a>
+<span class="sourceLineNo">255</span><a name="line.255"></a>
+<span class="sourceLineNo">256</span>  public BucketCache(String ioEngineName, long capacity, int blockSize, int[] bucketSizes,<a name="line.256"></a>
+<span class="sourceLineNo">257</span>                     int writerThreadNum, int writerQLen, String persistencePath, int ioErrorsTolerationDuration,<a name="line.257"></a>
+<span class="sourceLineNo">258</span>                     Configuration conf)<a name="line.258"></a>
+<span class="sourceLineNo">259</span>      throws FileNotFoundException, IOException {<a name="line.259"></a>
+<span class="sourceLineNo">260</span>    this.ioEngine = getIOEngineFromName(ioEngineName, capacity, persistencePath);<a name="line.260"></a>
+<span class="sourceLineNo">261</span>    this.writerThreads = new WriterThread[writerThreadNum];<a name="line.261"></a>
+<span class="sourceLineNo">262</span>    long blockNumCapacity = capacity / blockSize;<a name="line.262"></a>
+<span class="sourceLineNo">263</span>    if (blockNumCapacity &gt;= Integer.MAX_VALUE) {<a name="line.263"></a>
+<span class="sourceLineNo">264</span>      // Enough for about 32TB of cache!<a name="line.264"></a>
+<span class="sourceLineNo">265</span>      throw new IllegalArgumentException("Cache capacity is too large, only support 32TB now");<a name="line.265"></a>
+<span class="sourceLineNo">266</span>    }<a name="line.266"></a>
+<span class="sourceLineNo">267</span><a name="line.267"></a>
+<span class="sourceLineNo">268</span>    this.acceptableFactor = conf.getFloat(ACCEPT_FACTOR_CONFIG_NAME, DEFAULT_ACCEPT_FACTOR);<a name="line.268"></a>
+<span class="sourceLineNo">269</span>    this.minFactor = conf.getFloat(MIN_FACTOR_CONFIG_NAME, DEFAULT_MIN_FACTOR);<a name="line.269"></a>
+<span class="sourceLineNo">270</span>    this.extraFreeFactor = conf.getFloat(EXTRA_FREE_FACTOR_CONFIG_NAME, DEFAULT_EXTRA_FREE_FACTOR);<a name="line.270"></a>
+<span class="sourceLineNo">271</span>    this.singleFactor = conf.getFloat(SINGLE_FACTOR_CONFIG_NAME, DEFAULT_SINGLE_FACTOR);<a name="line.271"></a>
+<span class="sourceLineNo">272</span>    this.multiFactor = conf.getFloat(MULTI_FACTOR_CONFIG_NAME, DEFAULT_MULTI_FACTOR);<a name="line.272"></a>
+<span class="sourceLineNo">273</span>    this.memoryFactor = conf.getFloat(MEMORY_FACTOR_CONFIG_NAME, DEFAULT_MEMORY_FACTOR);<a name="line.273"></a>
+<span class="sourceLineNo">274</span><a name="line.274"></a>
+<span class="sourceLineNo">275</span>    sanityCheckConfigs();<a name="line.275"></a>
 <span class="sourceLineNo">276</span><a name="line.276"></a>
-<span class="sourceLineNo">277</span>    sanityCheckConfigs();<a name="line.277"></a>
-<span class="sourceLineNo">278</span><a name="line.278"></a>
-<span class="sourceLineNo">279</span>    LOG.info("Instantiating BucketCache with acceptableFactor: " + acceptableFactor + ", minFactor: " + minFactor +<a name="line.279"></a>
-<span class="sourceLineNo">280</span>        ", extraFreeFactor: " + extraFreeFactor + ", singleFactor: " + singleFactor + ", multiFactor: " + multiFactor +<a name="line.280"></a>
-<span class="sourceLineNo">281</span>        ", memoryFactor: " + memoryFactor);<a name="line.281"></a>
-<span class="sourceLineNo">282</span><a name="line.282"></a>
-<span class="sourceLineNo">283</span>    this.cacheCapacity = capacity;<a name="line.283"></a>
-<span class="sourceLineNo">284</span>    this.persistencePath = persistencePath;<a name="line.284"></a>
-<span class="sourceLineNo">285</span>    this.blockSize = blockSize;<a name="line.285"></a>
-<span class="sourceLineNo">286</span>    this.ioErrorsTolerationDuration = ioErrorsTolerationDuration;<a name="line.286"></a>
-<span class="sourceLineNo">287</span><a name="line.287"></a>
-<span class="sourceLineNo">288</span>    bucketAllocator = new BucketAllocator(capacity, bucketSizes);<a name="line.288"></a>
-<span class="sourceLineNo">289</span>    for (int i = 0; i &lt; writerThreads.length; ++i) {<a name="line.289"></a>
-<span class="sourceLineNo">290</span>      writerQueues.add(new ArrayBlockingQueue&lt;&gt;(writerQLen));<a name="line.290"></a>
-<span class="sourceLineNo">291</span>    }<a name="line.291"></a>
-<span class="sourceLineNo">292</span><a name="line.292"></a>
-<span class="sourceLineNo">293</span>    assert writerQueues.size() == writerThreads.length;<a name="line.293"></a>
-<span class="sourceLineNo">294</span>    this.ramCache = new ConcurrentHashMap&lt;&gt;();<a name="line.294"></a>
+<span class="sourceLineNo">277</span>    LOG.info("Instantiating BucketCache with acceptableFactor: " + acceptableFactor + ", minFactor: " + minFactor +<a name="line.277"></a>
+<span class="sourceLineNo">278</span>        ", extraFreeFactor: " + extraFreeFactor + ", singleFactor: " + singleFactor + ", multiFactor: " + multiFactor +<a name="line.278"></a>
+<span class="sourceLineNo">279</span>        ", memoryFactor: " + memoryFactor);<a name="line.279"></a>
+<span class="sourceLineNo">280</span><a name="line.280"></a>
+<span class="sourceLineNo">281</span>    this.cacheCapacity = capacity;<a name="line.281"></a>
+<span class="sourceLineNo">282</span>    this.persistencePath = persistencePath;<a name="line.282"></a>
+<span class="sourceLineNo">283</span>    this.blockSize = blockSize;<a name="line.283"></a>
+<span class="sourceLineNo">284</span>    this.ioErrorsTolerationDuration = ioErrorsTolerationDuration;<a name="line.284"></a>
+<span class="sourceLineNo">285</span><a name="line.285"></a>
+<span class="sourceLineNo">286</span>    bucketAllocator = new BucketAllocator(capacity, bucketSizes);<a name="line.286"></a>
+<span class="sourceLineNo">287</span>    for (int i = 0; i &lt; writerThreads.length; ++i) {<a name="line.287"></a>
+<span class="sourceLineNo">288</span>      writerQueues.add(new ArrayBlockingQueue&lt;&gt;(writerQLen));<a name="line.288"></a>
+<span class="sourceLineNo">289</span>    }<a name="line.289"></a>
+<span class="sourceLineNo">290</span><a name="line.290"></a>
+<span class="sourceLineNo">291</span>    assert writerQueues.size() == writerThreads.length;<a name="line.291"></a>
+<span class="sourceLineNo">292</span>    this.ramCache = new ConcurrentHashMap&lt;&gt;();<a name="line.292"></a>
+<span class="sourceLineNo">293</span><a name="line.293"></a>
+<span class="sourceLineNo">294</span>    this.backingMap = new ConcurrentHashMap&lt;&gt;((int) blockNumCapacity);<a name="line.294"></a>
 <span class="sourceLineNo">295</span><a name="line.295"></a>
-<span class="sourceLineNo">296</span>    this.backingMap = new ConcurrentHashMap&lt;&gt;((int) blockNumCapacity);<a name="line.296"></a>
-<span class="sourceLineNo">297</span><a name="line.297"></a>
-<span class="sourceLineNo">298</span>    if (ioEngine.isPersistent() &amp;&amp; persistencePath != null) {<a name="line.298"></a>
-<span class="sourceLineNo">299</span>      try {<a name="line.299"></a>
-<span class="sourceLineNo">300</span>        retrieveFromFile(bucketSizes);<a name="line.300"></a>
-<span class="sourceLineNo">301</span>      } catch (IOException ioex) {<a name="line.301"></a>
-<span class="sourceLineNo">302</span>        LOG.error("Can't restore from file because of", ioex);<a name="line.302"></a>
-<span class="sourceLineNo">303</span>      } catch (ClassNotFoundException cnfe) {<a name="line.303"></a>
-<span class="sourceLineNo">304</span>        LOG.error("Can't restore from file in rebuild because can't deserialise",cnfe);<a name="line.304"></a>
-<span class="sourceLineNo">305</span>        throw new RuntimeException(cnfe);<a name="line.305"></a>
-<span class="sourceLineNo">306</span>      }<a name="line.306"></a>
-<span class="sourceLineNo">307</span>    }<a name="line.307"></a>
-<span class="sourceLineNo">308</span>    final String threadName = Thread.currentThread().getName();<a name="line.308"></a>
-<span class="sourceLineNo">309</span>    this.cacheEnabled = true;<a name="line.309"></a>
-<span class="sourceLineNo">310</span>    for (int i = 0; i &lt; writerThreads.length; ++i) {<a name="line.310"></a>
-<span class="sourceLineNo">311</span>      writerThreads[i] = new WriterThread(writerQueues.get(i));<a name="line.311"></a>
-<span class="sourceLineNo">312</span>      writerThreads[i].setName(threadName + "-BucketCacheWriter-" + i);<a name="line.312"></a>
-<span class="sourceLineNo">313</span>      writerThreads[i].setDaemon(true);<a name="line.313"></a>
-<span class="sourceLineNo">314</span>    }<a name="line.314"></a>
-<span class="sourceLineNo">315</span>    startWriterThreads();<a name="line.315"></a>
-<span class="sourceLineNo">316</span><a name="line.316"></a>
-<span class="sourceLineNo">317</span>    // Run the statistics thread periodically to print the cache statistics log<a name="line.317"></a>
-<span class="sourceLineNo">318</span>    // TODO: Add means of turning this off.  Bit obnoxious running thread just to make a log<a name="line.318"></a>
-<span class="sourceLineNo">319</span>    // every five minutes.<a name="line.319"></a>
-<span class="sourceLineNo">320</span>    this.scheduleThreadPool.scheduleAtFixedRate(new StatisticsThread(this),<a name="line.320"></a>
-<span class="sourceLineNo">321</span>        statThreadPeriod, statThreadPeriod, TimeUnit.SECONDS);<a name="line.321"></a>
-<span class="sourceLineNo">322</span>    LOG.info("Started bucket cache; ioengine=" + ioEngineName +<a name="line.322"></a>
-<span class="sourceLineNo">323</span>        ", capacity=" + StringUtils.byteDesc(capacity) +<a name="line.323"></a>
-<span class="sourceLineNo">324</span>      ", blockSize=" + StringUtils.byteDesc(blockSize) + ", writerThreadNum=" +<a name="line.324"></a>
-<span class="sourceLineNo">325</span>        writerThreadNum + ", writerQLen=" + writerQLen + ", persistencePath=" +<a name="line.325"></a>
-<span class="sourceLineNo">326</span>      persistencePath + ", bucketAllocator=" + this.bucketAllocator.getClass().getName());<a name="line.326"></a>
-<span class="sourceLineNo">327</span>  }<a name="line.327"></a>
-<span class="sourceLineNo">328</span><a name="line.328"></a>
-<span class="sourceLineNo">329</span>  private void sanityCheckConfigs() {<a name="line.329"></a>
-<span class="sourceLineNo">330</span>    Preconditions.checkArgument(acceptableFactor &lt;= 1 &amp;&amp; acceptableFactor &gt;= 0, ACCEPT_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;= 1 &amp;&amp; minFactor &gt;= 0, MIN_FACTOR_CONFIG_NAME + " must be between 0.0 and 1.0");<a name="line.331"></a>
-<span class="sourceLineNo">332</span>    Preconditions.checkArgument(minFactor &lt;= acceptableFactor, MIN_FACTOR_CONFIG_NAME + " must be &lt;= " + ACCEPT_FACTOR_CONFIG_NAME);<a name="line.332"></a>
-<span class="sourceLineNo">333</span>    Preconditions.checkArgument(extraFreeFactor &gt;= 0, EXTRA_FREE_FACTOR_CONFIG_NAME + " must be greater than 0.0");<a name="line.333"></a>
-<span class="sourceLineNo">334</span>    Preconditions.checkArgument(singleFactor &lt;= 1 &amp;&amp; singleFactor &gt;= 0, SINGLE_FACTOR_CONFIG_NAME + " must be between 0.0 and 1.0");<a name="line.334"></a>
-<span class="sourceLineNo">335</span>    Preconditions.checkArgument(multiFactor &lt;= 1 &amp;&amp; multiFactor &gt;= 0, MULTI_FACTOR_CONFIG_NAME + " must be between 0.0 and 1.0");<a name="line.335"></a>
-<span class="sourceLineNo">336</span>    Preconditions.checkArgument(memoryFactor &lt;= 1 &amp;&amp; memoryFactor &gt;= 0, MEMORY_FACTOR_CONFIG_NAME + " must be between 0.0 and 1.0");<a name="line.336"></a>
-<span class="sourceLineNo">337</span>    Preconditions.checkArgument((singleFactor + multiFactor + memoryFactor) == 1, SINGLE_FACTOR_CONFIG_NAME + ", " +<a name="line.337"></a>
-<span class="sourceLineNo">338</span>        MULTI_FACTOR_CONFIG_NAME + ", and " + MEMORY_FACTOR_CONFIG_NAME + " segments must add up to 1.0");<a name="line.338"></a>
-<span class="sourceLineNo">339</span>  }<a name="line.339"></a>
-<span class="sourceLineNo">340</span><a name="line.340"></a>
-<span class="sourceLineNo">341</span>  /**<a name="line.341"></a>
-<span class="sourceLineNo">342</span>   * Called by the constructor to start the writer threads. Used by tests that need to override<a name="line.342"></a>
-<span class="sourceLineNo">343</span>   * starting the threads.<a name="line.343"></a>
-<span class="sourceLineNo">344</span>   */<a name="line.344"></a>
-<span class="sourceLineNo">345</span>  @VisibleForTesting<a name="line.345"></a>
-<span class="sourceLineNo">346</span>  protected void startWriterThreads() {<a name="line.346"></a>
-<span class="sourceLineNo">347</span>    for (WriterThread thread : writerThreads) {<a name="line.347"></a>
-<span class="sourceLineNo">348</span>      thread.start();<a name="line.348"></a>
-<span class="sourceLineNo">349</span>    }<a name="line.349"></a>
+<span class="sourceLineNo">296</span>    if (ioEngine.isPersistent() &amp;&amp; persistencePath != null) {<a name="line.296"></a>
+<span class="sourceLineNo">297</span>      try {<a name="line.297"></a>
+<span class="sourceLineNo">298</span>        retrieveFromFile(bucketSizes);<a name="line.298"></a>
+<span class="sourceLineNo">299</span>      } catch (IOException ioex) {<a name="line.299"></a>
+<span class="sourceLineNo">300</span>        LOG.error("Can't restore from file[" + persistencePath + "] because of ", ioex);<a name="line.300"></a>
+<span class="sourceLineNo">301</span>      }<a name="line.301"></a>
+<span class="sourceLineNo">302</span>    }<a name="line.302"></a>
+<span class="sourceLineNo">303</span>    final String threadName = Thread.currentThread().getName();<a name="line.303"></a>
+<span class="sourceLineNo">304</span>    this.cacheEnabled = true;<a name="line.304"></a>
+<span class="sourceLineNo">305</span>    for (int i = 0; i &lt; writerThreads.length; ++i) {<a name="line.305"></a>
+<span class="sourceLineNo">306</span>      writerThreads[i] = new WriterThread(writerQueues.get(i));<a name="line.306"></a>
+<span class="sourceLineNo">307</span>      writerThreads[i].setName(threadName + "-BucketCacheWriter-" + i);<a name="line.307"></a>
+<span class="sourceLineNo">308</span>      writerThreads[i].setDaemon(true);<a name="line.308"></a>
+<span class="sourceLineNo">309</span>    }<a name="line.309"></a>
+<span class="sourceLineNo">310</span>    startWriterThreads();<a name="line.310"></a>
+<span class="sourceLineNo">311</span><a name="line.311"></a>
+<span class="sourceLineNo">312</span>    // Run the statistics thread periodically to print the cache statistics log<a name="line.312"></a>
+<span class="sourceLineNo">313</span>    // TODO: Add means of turning this off.  Bit obnoxious running thread just to make a log<a name="line.313"></a>
+<span class="sourceLineNo">314</span>    // every five minutes.<a name="line.314"></a>
+<span class="sourceLineNo">315</span>    this.scheduleThreadPool.scheduleAtFixedRate(new StatisticsThread(this),<a name="line.315"></a>
+<span class="sourceLineNo">316</span>        statThreadPeriod, statThreadPeriod, TimeUnit.SECONDS);<a name="line.316"></a>
+<span class="sourceLineNo">317</span>    LOG.info("Started bucket cache; ioengine=" + ioEngineName +<a name="line.317"></a>
+<span class="sourceLineNo">318</span>        ", capacity=" + StringUtils.byteDesc(capacity) +<a name="line.318"></a>
+<span class="sourceLineNo">319</span>      ", blockSize=" + StringUtils.byteDesc(blockSize) + ", writerThreadNum=" +<a name="line.319"></a>
+<span class="sourceLineNo">320</span>        writerThreadNum + ", writerQLen=" + writerQLen + ", persistencePath=" +<a name="line.320"></a>
+<span class="sourceLineNo">321</span>      persistencePath + ", bucketAllocator=" + this.bucketAllocator.getClass().getName());<a name="line.321"></a>
+<span class="sourceLineNo">322</span>  }<a name="line.322"></a>
+<span class="sourceLineNo">323</span><a name="line.323"></a>
+<span class="sourceLineNo">324</span>  private void sanityCheckConfigs() {<a name="line.324"></a>
+<span class="sourceLineNo">325</span>    Preconditions.checkArgument(acceptableFactor &lt;= 1 &amp;&amp; acceptableFactor &gt;= 0, ACCEPT_FACTOR_CONFIG_NAME + " must be between 0.0 and 1.0");<a name="line.325"></a>
+<span class="sourceLineNo">326</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.326"></a>
+<span class="sourceLineNo">327</span>    Preconditions.checkArgument(minFactor &lt;= acceptableFactor, MIN_FACTOR_CONFIG_NAME + " must be &lt;= " + ACCEPT_FACTOR_CONFIG_NAME);<a name="line.327"></a>
+<span class="sourceLineNo">328</span>    Preconditions.checkArgument(extraFreeFactor &gt;= 0, EXTRA_FREE_FACTOR_CONFIG_NAME + " must be greater than 0.0");<a name="line.328"></a>
+<span class="sourceLineNo">329</span>    Preconditions.checkArgument(singleFactor &lt;= 1 &amp;&amp; singleFactor &gt;= 0, SINGLE_FACTOR_CONFIG_NAME + " must be between 0.0 and 1.0");<a name="line.329"></a>
+<span class="sourceLineNo">330</span>    Preconditions.checkArgument(multiFactor &lt;= 1 &amp;&amp; multiFactor &gt;= 0, MULTI_FACTOR_CONFIG_NAME + " must be between 0.0 and 1.0");<a name="line.330"></a>
+<span class="sourceLineNo">331</span>    Preconditions.checkArgument(memoryFactor &lt;= 1 &amp;&amp; memoryFactor &gt;= 0, MEMORY_FACTOR_CONFIG_NAME + " must be between 0.0 and 1.0");<a name="line.331"></a>
+<span class="sourceLineNo">332</span>    Preconditions.checkArgument((singleFactor + multiFactor + memoryFactor) == 1, SINGLE_FACTOR_CONFIG_NAME + ", " +<a name="line.332"></a>
+<span class="sourceLineNo">333</span>        MULTI_FACTOR_CONFIG_NAME + ", and " + MEMORY_FACTOR_CONFIG_NAME + " segments must add up to 1.0");<a name="line.333"></a>
+<span class="sourceLineNo">334</span>  }<a name="line.334"></a>
+<span class="sourceLineNo">335</span><a name="line.335"></a>
+<span class="sourceLineNo">336</span>  /**<a name="line.336"></a>
+<span class="sourceLineNo">337</span>   * Called by the constructor to start the writer threads. Used by tests that need to override<a name="line.337"></a>
+<span class="sourceLineNo">338</span>   * starting the threads.<a name="line.338"></a>
+<span class="sourceLineNo">339</span>   */<a name="line.339"></a>
+<span class="sourceLineNo">340</span>  @VisibleForTesting<a name="line.340"></a>
+<span class="sourceLineNo">341</span>  protected void startWriterThreads() {<a name="line.341"></a>
+<span class="sourceLineNo">342</span>    for (WriterThread thread : writerThreads) {<a name="line.342"></a>
+<span class="sourceLineNo">343</span>      thread.start();<a name="line.343"></a>
+<span class="sourceLineNo">344</span>    }<a name="line.344"></a>
+<span class="sourceLineNo">345</span>  }<a name="line.345"></a>
+<span class="sourceLineNo">346</span><a name="line.346"></a>
+<span class="sourceLineNo">347</span>  @VisibleForTesting<a name="line.347"></a>
+<span class="sourceLineNo">348</span>  boolean isCacheEnabled() {<a name="line.348"></a>
+<span class="sourceLineNo">349</span>    return this.cacheEnabled;<a name="line.349"></a>
 <span class="sourceLineNo">350</span>  }<a name="line.350"></a>
 <span class="sourceLineNo">351</span><a name="line.351"></a>
-<span class="sourceLineNo">352</span>  @VisibleForTesting<a name="line.352"></a>
-<span class="sourceLineNo">353</span>  boolean isCacheEnabled() {<a name="line.353"></a>
-<span class="sourceLineNo">354</span>    return this.cacheEnabled;<a name="line.354"></a>
+<span class="sourceLineNo">352</span>  @Override<a name="line.352"></a>
+<span class="sourceLineNo">353</span>  public long getMaxSize() {<a name="line.353"></a>
+<span class="sourceLineNo">354</span>    return this.cacheCapacity;<a name="line.354"></a>
 <span class="sourceLineNo">355</span>  }<a name="line.355"></a>
 <span class="sourceLineNo">356</span><a name="line.356"></a>
-<span class="sourceLineNo">357</span>  @Override<a name="line.357"></a>
-<span class="sourceLineNo">358</span>  public long getMaxSize() {<a name="line.358"></a>
-<span class="sourceLineNo">359</span>    return this.cacheCapacity;<a name="line.359"></a>
-<span class="sourceLineNo">360</span>  }<a name="line.360"></a>
-<span class="sourceLineNo">361</span><a name="line.361"></a>
-<span class="sourceLineNo">362</span>  public String getIoEngine() {<a name="line.362"></a>
-<span class="sourceLineNo">363</span>    return ioEngine.toString();<a name="line.363"></a>
-<span class="sourceLineNo">364</span>  }<a name="line.364"></a>
-<span class="sourceLineNo">365</span><a name="line.365"></a>
-<span class="sourceLineNo">366</span>  /**<a name="line.366"></a>
-<span class="sourceLineNo">367</span>   * Get the IOEngine from the IO engine name<a name="line.367"></a>
-<span class="sourceLineNo">368</span>   * @param ioEngineName<a name="line.368"></a>
-<span class="sourceLineNo">369</span>   * @param capacity<a name="line.369"></a>
-<span class="sourceLineNo">370</span>   * @param persistencePath<a name="line.370"></a>
-<span class="sourceLineNo">371</span>   * @return the IOEngine<a name="line.371"></a>
-<span class="sourceLineNo">372</span>   * @throws IOException<a name="line.372"></a>
-<span class="sourceLineNo">373</span>   */<a name="line.373"></a>
-<span class="sourceLineNo">374</span>  private IOEngine getIOEngineFromName(String ioEngineName, long capacity, String persistencePath)<a name="line.374"></a>
-<span class="sourceLineNo">375</span>      throws IOException {<a name="line.375"></a>
-<span class="sourceLineNo">376</span>    if (ioEngineName.startsWith("file:") || ioEngineName.startsWith("files:")) {<a name="line.376"></a>
-<span class="sourceLineNo">377</span>      // In order to make the usage simple, we only need the prefix 'files:' in<a name="line.377"></a>
-<span class="sourceLineNo">378</span>      // document whether one or multiple file(s), but also support 'file:' for<a name="line.378"></a>
-<span class="sourceLineNo">379</span>      // the compatibility<a name="line.379"></a>
-<span class="sourceLineNo">380</span>      String[] filePaths = ioEngineName.substring(ioEngineName.indexOf(":") + 1)<a name="line.380"></a>
-<span class="sourceLineNo">381</span>          .split(FileIOEngine.FILE_DELIMITER);<a name="line.381"></a>
-<span class="sourceLineNo">382</span>      return new FileIOEngine(capacity, persistencePath != null, filePaths);<a name="line.382"></a>
-<span class="sourceLineNo">383</span>    } else if (ioEngineName.startsWith("offheap")) {<a name="line.383"></a>
-<span class="sourceLineNo">384</span>      return new ByteBufferIOEngine(capacity);<a name="line.384"></a>
-<span class="sourceLineNo">385</span>    } else if (ioEngineName.startsWith("mmap:")) {<a name="line.385"></a>
-<span class="sourceLineNo">386</span>      return new FileMmapEngine(ioEngineName.substring(5), capacity);<a name="line.386"></a>
-<span class="sourceLineNo">387</span>    } else {<a name="line.387"></a>
-<span class="sourceLineNo">388</span>      throw new IllegalArgumentException(<a name="line.388"></a>
-<span class="sourceLineNo">389</span>          "Don't understand io engine name for cache- prefix with file:, files:, mmap: or offheap");<a name="line.389"></a>
-<span class="sourceLineNo">390</span>    }<a name="line.390"></a>
-<span class="sourceLineNo">391</span>  }<a name="line.391"></a>
-<span class="sourceLineNo">392</span><a name="line.392"></a>
-<span class="sourceLineNo">393</span>  /**<a name="line.393"></a>
-<span class="sourceLineNo">394</span>   * Cache the block with the specified name and buffer.<a name="line.394"></a>
-<span class="sourceLineNo">395</span>   * @param cacheKey block's cache key<a name="line.395"></a>
-<span class="sourceLineNo">396</span>   * @param buf block buffer<a name="line.396"></a>
-<span class="sourceLineNo">397</span>   */<a name="line.397"></a>
-<span class="sourceLineNo">398</span>  @Override<a name="line.398"></a>
-<span class="sourceLineNo">399</span>  public void cacheBlock(BlockCacheKey cacheKey, Cacheable buf) {<a name="line.399"></a>
-<span class="sourceLineNo">400</span>    cacheBlock(cacheKey, buf, false);<a name="line.400"></a>
-<span class="sourceLineNo">401</span>  }<a name="line.401"></a>
-<span class="sourceLineNo">402</span><a name="line.402"></a>
-<span class="sourceLineNo">403</span>  /**<a name="line.403"></a>
-<span class="sourceLineNo">404</span>   * Cache the block with the specified name and buffer.<a name="line.404"></a>
-<span class="sourceLineNo">405</span>   * @param cacheKey block's cache key<a name="line.405"></a>
-<span class="sourceLineNo">406</span>   * @param cachedItem block buffer<a name="line.406"></a>
-<span class="sourceLineNo">407</span>   * @param inMemory if block is in-memory<a name="line.407"></a>
-<span class="sourceLineNo">408</span>   */<a name="line.408"></a>
-<span class="sourceLineNo">409</span>  @Override<a name="line.409"></a>
-<span class="sourceLineNo">410</span>  public void cacheBlock(BlockCacheKey cacheKey, Cacheable cachedItem, boolean inMemory) {<a name="line.410"></a>
-<span class="sourceLineNo">411</span>    cacheBlockWithWait(cacheKey, cachedItem, inMemory, wait_when_cache);<a name="line.411"></a>
-<span class="sourceLineNo">412</span>  }<a name="line.412"></a>
-<span class="sourceLineNo">413</span><a name="line.413"></a>
-<span class="sourceLineNo">414</span>  /**<a name="line.414"></a>
-<span class="sourceLineNo">415</span>   * Cache the block to ramCache<a name="line.415"></a>
-<span class="sourceLineNo">416</span>   * @param cacheKey block's cache key<a name="line.416"></a>
-<span class="sourceLineNo">417</span>   * @param cachedItem block buffer<a name="line.417"></a>
-<span class="sourceLineNo">418</span>   * @param inMemory if block is in-memory<a name="line.418"></a>
-<span class="sourceLineNo">419</span>   * @param wait if true, blocking wait when queue is full<a name="line.419"></a>
-<span class="sourceLineNo">420</span>   */<a name="line.420"></a>
-<span class="sourceLineNo">421</span>  private void cacheBlockWithWait(BlockCacheKey cacheKey, Cacheable cachedItem, boolean inMemory,<a name="line.421"></a>
-<span class="sourceLineNo">422</span>      boolean wait) {<a name="line.422"></a>
-<span class="sourceLineNo">423</span>    if (cacheEnabled) {<a name="line.423"></a>
-<span class="sourceLineNo">424</span>      if (backingMap.containsKey(cacheKey) || ramCache.containsKey(cacheKey)) {<a name="line.424"></a>
-<span class="sourceLineNo">425</span>        if (BlockCacheUtil.shouldReplaceExistingCacheBlock(this, cacheKey, cachedItem)) {<a name="line.425"></a>
-<span class="sourceLineNo">426</span>          cacheBlockWithWaitInternal(cacheKey, cachedItem, inMemory, wait);<a name="line.426"></a>
-<span class="sourceLineNo">427</span>        }<a name="line.427"></a>
-<span class="sourceLineNo">428</span>      } else {<a name="line.428"></a>
-<span class="sourceLineNo">429</span>        cacheBlockWithWaitInternal(cacheKey, cachedItem, inMemory, wait);<a name="line.429"></a>
-<span class="sourceLineNo">430</span>      }<a name="line.430"></a>
-<span class="sourceLineNo">431</span>    }<a name="line.431"></a>
-<span class="sourceLineNo">432</span>  }<a name="line.432"></a>
-<span class="sourceLineNo">433</span><a name="line.433"></a>
-<span class="sourceLineNo">434</span>  private void cacheBlockWithWaitInternal(BlockCacheKey cacheKey, Cacheable cachedItem,<a name="line.434"></a>
-<span class="sourceLineNo">435</span>      boolean inMemory, boolean wait) {<a name="line.435"></a>
-<span class="sourceLineNo">436</span>    if (!cacheEnabled) {<a name="line.436"></a>
-<span class="sourceLineNo">437</span>      return;<a name="line.437"></a>
-<span class="sourceLineNo">438</span>    }<a name="line.438"></a>
-<span class="sourceLineNo">439</span>    LOG.trace("Caching key={}, item={}", cacheKey, cachedItem);<a name="line.439"></a>
-<span class="sourceLineNo">440</span>    // Stuff the entry into the RAM cache so it can get drained to the persistent store<a name="line.440"></a>
-<span class="sourceLineNo">441</span>    RAMQueueEntry re =<a name="line.441"></a>
-<span class="sourceLineNo">442</span>        new RAMQueueEntry(cacheKey, cachedItem, accessCount.incrementAndGet(), inMemory);<a name="line.442"></a>
-<span class="sourceLineNo">443</span>    /**<a name="line.443"></a>
-<span class="sourceLineNo">444</span>     * Don't use ramCache.put(cacheKey, re) here. because there may be a existing entry with same<a name="line.444"></a>
-<span class="sourceLineNo">445</span>     * key in ramCache, the heap size of bucket cache need to update if replacing entry from<a name="line.445"></a>
-<span class="sourceLineNo">446</span>     * ramCache. But WriterThread will also remove entry from ramCache and update heap size, if<a name="line.446"></a>
-<span class="sourceLineNo">447</span>     * using ramCache.put(), It's possible that the removed entry in WriterThread is not the correct<a name="line.447"></a>
-<span class="sourceLineNo">448</span>     * one, then the heap size will mess up (HBASE-20789)<a name="line.448"></a>
-<span class="sourceLineNo">449</span>     */<a name="line.449"></a>
-<span class="sourceLineNo">450</span>    if (ramCache.putIfAbsent(cacheKey, re) != null) {<a name="line.450"></a>
-<span class="sourceLineNo">451</span>      return;<a name="line.451"></a>
-<span class="sourceLineNo">452</span>    }<a name="line.452"></a>
-<span class="sourceLineNo">453</span>    int queueNum = (cacheKey.hashCode() &amp; 0x7FFFFFFF) % writerQueues.size();<a name="line.453"></a>
-<span class="sourceLineNo">454</span>    BlockingQueue&lt;RAMQueueEntry&gt; bq = writerQueues.get(queueNum);<a name="line.454"></a>
-<span class="sourceLineNo">455</span>    boolean successfulAddition = false;<a name="line.455"></a>
-<span class="sourceLineNo">456</span>    if (wait) {<a name="line.456"></a>
-<span class="sourceLineNo">457</span>      try {<a name="line.457"></a>
-<span class="sourceLineNo">458</span>        successfulAddition = bq.offer(re, DEFAULT_CACHE_WAIT_TIME, TimeUnit.MILLISECONDS);<a name="line.458"></a>
-<span class="sourceLineNo">459</span>      } catch (InterruptedException e) {<a name="line.459"></a>
-<span class="sourceLineNo">460</span>        Thread.currentThread().interrupt();<a name="line.460"></a>
-<span class="sourceLineNo">461</span>      }<a name="line.461"></a>
-<span class="sourceLineNo">462</span>    } else {<a name="line.462"></a>
-<span class="sourceLineNo">463</span>      successfulAddition = bq.offer(re);<a name="line.463"></a>
-<span class="sourceLineNo">464</span>    }<a name="line.464"></a>
-<span class="sourceLineNo">465</span>    if (!successfulAddition) {<a name="line.465"></a>
-<span class="sourceLineNo">466</span>      ramCache.remove(cacheKey);<a name="line.466"></a>
-<span class="sourceLineNo">467</span>      cacheStats.failInsert();<a name="line.467"></a>
-<span class="sourceLineNo">468</span>    } else {<a name="line.468"></a>
-<span class="sourceLineNo">469</span>      this.blockNumber.increment();<a name="line.469"></a>
-<span class="sourceLineNo">470</span>      this.heapSize.add(cachedItem.heapSize());<a name="line.470"></a>
-<span class="sourceLineNo">471</span>      blocksByHFile.add(cacheKey);<a name="line.471"></a>
-<span class="sourceLineNo">472</span>    }<a name="line.472"></a>
-<span class="sourceLineNo">473</span>  }<a name="line.473"></a>
-<span class="sourceLineNo">474</span><a name="line.474"></a>
-<span class="sourceLineNo">475</span>  /**<a name="line.475"></a>
-<span class="sourceLineNo">476</span>   * Get the buffer of the block with the specified key.<a name="line.476"></a>
-<span class="sourceLineNo">477</span>   * @param key block's cache key<a name="line.477"></a>
-<span class="sourceLineNo">478</span>   * @param caching true if the caller caches blocks on cache misses<a name="line.478"></a>
-<span class="sourceLineNo">479</span>   * @param repeat Whether this is a repeat lookup for the same block<a name="line.479"></a>
-<span class="sourceLineNo">480</span>   * @param updateCacheMetrics Whether we should update cache metrics or not<a name="line.480"></a>
-<span class="sourceLineNo">481</span>   * @return buffer of specified cache key, or null if not in cache<a name="line.481"></a>
-<span class="sourceLineNo">482</span>   */<a name="line.482"></a>
-<span class="sourceLineNo">483</span>  @Override<a name="line.483"></a>
-<span class="sourceLineNo">484</span>  public Cacheable getBlock(BlockCacheKey key, boolean caching, boolean repeat,<a name="line.484"></a>
-<span class="sourceLineNo">485</span>      boolean updateCacheMetrics) {<a name="line.485"></a>
-<span class="sourceLineNo">486</span>    if (!cacheEnabled) {<a name="line.486"></a>
-<span class="sourceLineNo">487</span>      return null;<a name="line.487"></a>
-<span class="sourceLineNo">488</span>    }<a name="line.488"></a>
-<span class="sourceLineNo">489</span>    RAMQueueEntry re = ramCache.get(key);<a name="line.489"></a>
-<span class="sourceLineNo">490</span>    if (re != null) {<a name="line.490"></a>
-<span class="sourceLineNo">491</span>      if (updateCacheMetrics) {<a name="line.491"></a>
-<span class="sourceLineNo">492</span>        cacheStats.hit(caching, key.isPrimary(), key.getBlockType());<a name="line.492"></a>
-<span class="sourceLineNo">493</span>      }<a name="line.493"></a>
-<span class="sourceLineNo">494</span>      re.access(accessCount.incrementAndGet());<a name="line.494"></a>
-<span class="sourceLineNo">495</span>      return re.getData();<a name="line.495"></a>
-<span class="sourceLineNo">496</span>    }<a name="line.496"></a>
-<span class="sourceLineNo">497</span>    BucketEntry bucketEntry = backingMap.get(key);<a name="line.497"></a>
-<span class="sourceLineNo">498</span>    if (bucketEntry != null) {<a name="line.498"></a>
-<span class="sourceLineNo">499</span>      long start = System.nanoTime();<a name="line.499"></a>
-<span class="sourceLineNo">500</span>      ReentrantReadWriteLock lock = offsetLock.getLock(bucketEntry.offset());<a name="line.500"></a>
-<span class="sourceLineNo">501</span>      try {<a name="line.501"></a>
-<span class="sourceLineNo">502</span>        lock.readLock().lock();<a name="line.502"></a>
-<span class="sourceLineNo">503</span>        // We can not read here even if backingMap does contain the given key because its offset<a name="line.503"></a>
-<span class="sourceLineNo">504</span>        // maybe changed. If we lock BlockCacheKey instead of offset, then we can only check<a name="line.504"></a>
-<span class="sourceLineNo">505</span>        // existence here.<a name="line.505"></a>
-<span class="sourceLineNo">506</span>        if (bucketEntry.equals(backingMap.get(key))) {<a name="line.506"></a>
-<span class="sourceLineNo">507</span>          // TODO : change this area - should be removed after server cells and<a name="line.507"></a>
-<span class="sourceLineNo">508</span>          // 12295 are available<a name="line.508"></a>
-<span class="sourceLineNo">509</span>          int len = bucketEntry.getLength();<a name="line.509"></a>
-<span class="sourceLineNo">510</span>          if (LOG.isTraceEnabled()) {<a name="line.510"></a>
-<span class="sourceLineNo">511</span>            LOG.trace("Read offset=" + bucketEntry.offset() + ", len=" + len);<a name="line.511"></a>
-<span class="sourceLineNo">512</span>          }<a name="line.512"></a>
-<span class="sourceLineNo">513</span>          Cacheable cachedBlock = ioEngine.read(bucketEntry.offset(), len,<a name="line.513"></a>
-<span class="sourceLineNo">514</span>              bucketEntry.deserializerReference(this.deserialiserMap));<a name="line.514"></a>
-<span class="sourceLineNo">515</span>          long timeTaken = System.nanoTime() - start;<a name="line.515"></a>
-<span class="sourceLineNo">516</span>          if (updateCacheMetrics) {<a name="line.516"></a>
-<span class="sourceLineNo">517</span>            cacheStats.hit(caching, key.isPrimary(), key.getBlockType());<a name="line.517"></a>
-<span class="sourceLineNo">518</span>            cacheStats.ioHit(timeTaken);<a name="line.518"></a>
-<span class="sourceLineNo">519</span>          }<a name="line.519"></a>
-<span class="sourceLineNo">520</span>          if (cachedBlock.getMemoryType() == MemoryType.SHARED) {<a name="line.520"></a>
-<span class="sourceLineNo">521</span>            bucketEntry.incrementRefCountAndGet();<a name="line.521"></a>
-<span class="sourceLineNo">522</span>          }<a name="line.522"></a>
-<span class="sourceLineNo">523</span>          bucketEntry.access(accessCount.incrementAndGet());<a name="line.523"></a>
-<span class="sourceLineNo">524</span>          if (this.ioErrorStartTime &gt; 0) {<a name="line.524"></a>
-<span class="sourceLineNo">525</span>            ioErrorStartTime = -1;<a name="line.525"></a>
-<span class="sourceLineNo">526</span>          }<a name="line.526"></a>
-<span class="sourceLineNo">527</span>          return cachedBlock;<a name="line.527"></a>
-<span class="sourceLineNo">528</span>        }<a name="line.528"></a>
-<span class="sourceLineNo">529</span>      } catch (IOException ioex) {<a name="line.529"></a>
-<span class="sourceLineNo">530</span>        LOG.error("Failed reading block " + key + " from bucket cache", ioex);<a name="line.530"></a>
-<span class="sourceLineNo">531</span>        checkIOErrorIsTolerated();<a name="line.531"></a>
-<span class="sourceLineNo">532</span>      } finally {<a name="line.532"></a>
-<span class="sourceLineNo">533</span>        lock.readLock().unlock();<a name="line.533"></a>
-<span class="sourceLineNo">534</span>      }<a name="line.534"></a>
-<span class="sourceLineNo">535</span>    }<a name="line.535"></a>
-<span class="sourceLineNo">536</span>    if (!repeat &amp;&amp; updateCacheMetrics) {<a name="line.536"></a>
-<span class="sourceLineNo">537</span>      cacheStats.miss(caching, key.isPrimary(), key.getBlockType());<a name="line.537"></a>
-<span class="sourceLineNo">538</span>    }<a name="line.538"></a>
-<span class="sourceLineNo">539</span>    return null;<a name="line.539"></a>
-<span class="sourceLineNo">540</span>  }<a name="line.540"></a>
-<span class="sourceLineNo">541</span><a name="line.541"></a>
-<span class="sourceLineNo">542</span>  @VisibleForTesting<a name="line.542"></a>
-<span class="sourceLineNo">543</span>  void blockEvicted(BlockCacheKey cacheKey, BucketEntry bucketEntry, boolean decrementBlockNumber) {<a name="line.543"></a>
-<span class="sourceLineNo">544</span>    bucketAllocator.freeBlock(bucketEntry.offset());<a name="line.544"></a>
-<span class="sourceLineNo">545</span>    realCacheSize.add(-1 * bucketEntry.getLength());<a name="line.545"></a>
-<span class="sourceLineNo">546</span>    blocksByHFile.remove(cacheKey);<a name="line.546"></a>
-<span class="sourceLineNo">547</span>    if (decrementBlockNumber) {<a name="line.547"></a>
-<span class="sourceLineNo">548</span>      this.blockNumber.decrement();<a name="line.548"></a>
-<span class="sourceLineNo">549</span>    }<a name="line.549"></a>
+<span class="sourceLineNo">357</span>  public String getIoEngine() {<a name="line.357"></a>
+<span class="sourceLineNo">358</span>    return ioEngine.toString();<a name="line.358"></a>
+<span class="sourceLineNo">359</span>  }<a name="line.359"></a>
+<span class="sourceLineNo">360</span><a name="line.360"></a>
+<span class="sourceLineNo">361</span>  /**<a name="line.361"></a>
+<span class="sourceLineNo">362</span>   * Get the IOEngine from the IO engine name<a name="line.362"></a>
+<span class="sourceLineNo">363</span>   * @param ioEngineName<a name="line.363"></a>
+<span class="sourceLineNo">364</span>   * @param capacity<a name="line.364"></a>
+<span class="sourceLineNo">365</span>   * @param persistencePath<a name="line.365"></a>
+<span class="sourceLineNo">366</span>   * @return the IOEngine<a name="line.366"></a>
+<span class="sourceLineNo">367</span>   * @throws IOException<a name="line.367"></a>
+<span class="sourceLineNo">368</span>   */<a name="line.368"></a>
+<span class="sourceLineNo">369</span>  private IOEngine getIOEngineFromName(String ioEngineName, long capacity, String persistencePath)<a name="line.369"></a>
+<span class="sourceLineNo">370</span>      throws IOException {<a name="line.370"></a>
+<span class="sourceLineNo">371</span>    if (ioEngineName.startsWith("file:") || ioEngineName.startsWith("files:")) {<a name="line.371"></a>
+<span class="sourceLineNo">372</span>      // In order to make the usage simple, we only need the prefix 'files:' in<a name="line.372"></a>
+<span class="sourceLineNo">373</span>      // document whether one or multiple file(s), but also support 'file:' for<a name="line.373"></a>
+<span class="sourceLineNo">374</span>      // the compatibility<a name="line.374"></a>
+<span class="sourceLineNo">375</span>      String[] filePaths = ioEngineName.substring(ioEngineName.indexOf(":") + 1)<a name="line.375"></a>
+<span class="sourceLineNo">376</span>          .split(FileIOEngine.FILE_DELIMITER);<a name="line.376"></a>
+<span class="sourceLineNo">377</span>      return new FileIOEngine(capacity, persistencePath != null, filePaths);<a name="line.377"></a>
+<span class="sourceLineNo">378</span>    } else if (ioEngineName.startsWith("offheap")) {<a name="line.378"></a>
+<span class="sourceLineNo">379</span>      return new ByteBufferIOEngine(capacity);<a name="line.379"></a>
+<span class="sourceLineNo">380</span>    } else if (ioEngineName.startsWith("mmap:")) {<a name="line.380"></a>
+<span class="sourceLineNo">381</span>      return new FileMmapEngine(ioEngineName.substring(5), capacity);<a name="line.381"></a>
+<span class="sourceLineNo">382</span>    } else {<a name="line.382"></a>
+<span class="sourceLineNo">383</span>      throw new IllegalArgumentException(<a name="line.383"></a>
+<span class="sourceLineNo">384</span>          "Don't understand io engine name for cache- prefix with file:, files:, mmap: or offheap");<a name="line.384"></a>
+<span class="sourceLineNo">385</span>    }<a name="line.385"></a>
+<span class="sourceLineNo">386</span>  }<a name="line.386"></a>
+<span class="sourceLineNo">387</span><a name="line.387"></a>
+<span class="sourceLineNo">388</span>  /**<a name="line.388"></a>
+<span class="sourceLineNo">389</span>   * Cache the block with the specified name and buffer.<a name="line.389"></a>
+<span class="sourceLineNo">390</span>   * @param cacheKey block's cache key<a name="line.390"></a>
+<span class="sourceLineNo">391</span>   * @param buf block buffer<a name="line.391"></a>
+<span class="sourceLineNo">392</span>   */<a name="line.392"></a>
+<span class="sourceLineNo">393</span>  @Override<a name="line.393"></a>
+<span class="sourceLineNo">394</span>  public void cacheBlock(BlockCacheKey cacheKey, Cacheable buf) {<a name="line.394"></a>
+<span class="sourceLineNo">395</span>    cacheBlock(cacheKey, buf, false);<a name="line.395"></a>
+<span class="sourceLineNo">396</span>  }<a name="line.396"></a>
+<span class="sourceLineNo">397</span><a name="line.397"></a>
+<span class="sourceLineNo">398</span>  /**<a name="line.398"></a>
+<span class="sourceLineNo">399</span>   * Cache the block with the specified name and buffer.<a name="line.399"></a>
+<span class="sourceLineNo">400</span>   * @param cacheKey block's cache key<a name="line.400"></a>
+<span class="sourceLineNo">401</span>   * @param cachedItem block buffer<a name="line.401"></a>
+<span class="sourceLineNo">402</span>   * @param inMemory if block is in-memory<a name="line.402"></a>
+<span class="sourceLineNo">403</span>   */<a name="line.403"></a>
+<span class="sourceLineNo">404</span>  @Override<a name="line.404"></a>
+<span class="sourceLineNo">405</span>  public void cacheBlock(BlockCacheKey cacheKey, Cacheable cachedItem, boolean inMemory) {<a name="line.405"></a>
+<span class="sourceLineNo">406</span>    cacheBlockWithWait(cacheKey, cachedItem, inMemory, wait_when_cache);<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>   * Cache the block to ramCache<a name="line.410"></a>
+<span class="sourceLineNo">411</span>   * @param cacheKey block's cache key<a name="line.411"></a>
+<span class="sourceLineNo">412</span>   * @param cachedItem block buffer<a name="line.412"></a>
+<span class="sourceLineNo">413</span>   * @param inMemory if block is in-memory<a name="line.413"></a>
+<span class="sourceLineNo">414</span>   * @param wait if true, blocking wait when queue is full<a name="line.414"></a>
+<span class="sourceLineNo">415</span>   */<a name="line.415"></a>
+<span class="sourceLineNo">416</span>  private void cacheBlockWithWait(BlockCacheKey cacheKey, Cacheable cachedItem, boolean inMemory,<a name="line.416"></a>
+<span class="sourceLineNo">417</span>      boolean wait) {<a name="line.417"></a>
+<span class="sourceLineNo">418</span>    if (cacheEnabled) {<a name="line.418"></a>
+<span class="sourceLineNo">419</span>      if (backingMap.containsKey(cacheKey) || ramCache.containsKey(cacheKey)) {<a name="line.419"></a>
+<span class="sourceLineNo">420</span>        if (BlockCacheUtil.shouldReplaceExistingCacheBlock(this, cacheKey, cachedItem)) {<a name="line.420"></a>
+<span class="sourceLineNo">421</span>          cacheBlockWithWaitInternal(cacheKey, cachedItem, inMemory, wait);<a name="line.421"></a>
+<span class="sourceLineNo">422</span>        }<a name="line.422"></a>
+<span class="sourceLineNo">423</span>      } else {<a name="line.423"></a>
+<span class="sourceLineNo">424</span>        cacheBlockWithWaitInternal(cacheKey, cachedItem, inMemory, wait);<a name="line.424"></a>
+<span class="sourceLineNo">425</span>      }<a name="line.425"></a>
+<span class="sourceLineNo">426</span>    }<a name="line.426"></a>
+<span class="sourceLineNo">427</span>  }<a name="line.427"></a>
+<span class="sourceLineNo">428</span><a name="line.428"></a>
+<span class="sourceLineNo">429</span>  private void cacheBlockWithWaitInternal(BlockCacheKey cacheKey, Cacheable cachedItem,<a name="line.429"></a>
+<span class="sourceLineNo">430</span>      boolean inMemory, boolean wait) {<a name="line.430"></a>
+<span class="sourceLineNo">431</span>    if (!cacheEnabled) {<a name="line.431"></a>
+<span class="sourceLineNo">432</span>      return;<a name="line.432"></a>
+<span class="sourceLineNo">433</span>    }<a name="line.433"></a>
+<span class="sourceLineNo">434</span>    LOG.trace("Caching key={}, item={}", cacheKey, cachedItem);<a name="line.434"></a>
+<span class="sourceLineNo">435</span>    // Stuff the entry into the RAM cache so it can get drained to the persistent store<a name="line.435"></a>
+<span class="sourceLineNo">436</span>    RAMQueueEntry re =<a name="line.436"></a>
+<span class="sourceLineNo">437</span>        new RAMQueueEntry(cacheKey, cachedItem, accessCount.incrementAndGet(), inMemory);<a name="line.437"></a>
+<span class="sourceLineNo">438</span>    /**<a name="line.438"></a>
+<span class="sourceLineNo">439</span>     * Don't use ramCache.put(cacheKey, re) here. because there may be a existing entry with same<a name="line.439"></a>
+<span class="sourceLineNo">440</span>     * key in ramCache, the heap size of bucket cache need to update if replacing entry from<a name="line.440"></a>
+<span class="sourceLineNo">441</span>     * ramCache. But WriterThread will also remove entry from ramCache and update heap size, if<a name="line.441"></a>
+<span class="sourceLineNo">442</span>     * using ramCache.put(), It's possible that the removed entry in WriterThread is not the correct<a name="line.442"></a>
+<span class="sourceLineNo">443</span>     * one, then the heap size will mess up (HBASE-20789)<a name="line.443"></a>
+<span class="sourceLineNo">444</span>     */<a name="line.444"></a>
+<span class="sourceLineNo">445</span>    if (ramCache.putIfAbsent(cacheKey, re) != null) {<a name="line.445"></a>
+<span class="sourceLineNo">446</span>      return;<a name="line.446"></a>
+<span class="sourceLineNo">447</span>    }<a name="line.447"></a>
+<span class="sourceLineNo">448</span>    int queueNum = (cacheKey.hashCode() &amp; 0x7FFFFFFF) % writerQueues.size();<a name="line.448"></a>
+<span class="sourceLineNo">449</span>    BlockingQueue&lt;RAMQueueEntry&gt; bq = writerQueues.get(queueNum);<a name="line.449"></a>
+<span class="sourceLineNo">450</span>    boolean successfulAddition = false;<a name="line.450"></a>
+<span class="sourceLineNo">451</span>    if (wait) {<a name="line.451"></a>
+<span class="sourceLineNo">452</span>      try {<a name="line.452"></a>
+<span class="sourceLineNo">453</span>        successfulAddition = bq.offer(re, DEFAULT_CACHE_WAIT_TIME, TimeUnit.MILLISECONDS);<a name="line.453"></a>
+<span class="sourceLineNo">454</span>      } catch (InterruptedException e) {<a name="line.454"></a>
+<span class="sourceLineNo">455</span>        Thread.currentThread().interrupt();<a name="line.455"></a>
+<span class="sourceLineNo">456</span>      }<a name="line.456"></a>
+<span class="sourceLineNo">457</span>    } else {<a name="line.457"></a>
+<span class="sourceLineNo">458</span>      successfulAddition = bq.offer(re);<a name="line.458"></a>
+<span class="sourceLineNo">459</span>    }<a name="line.459"></a>
+<span class="sourceLineNo">460</span>    if (!successfulAddition) {<a name="line.460"></a>
+<span class="sourceLineNo">461</span>      ramCache.remove(cacheKey);<a name="line.461"></a>
+<span class="sourceLineNo">462</span>      cacheStats.failInsert();<a name="line.462"></a>
+<span class="sourceLineNo">463</span>    } else {<a name="line.463"></a>
+<span class="sourceLineNo">464</span>      this.blockNumber.increment();<a name="line.464"></a>
+<span class="sourceLineNo">465</span>      this.heapSize.add(cachedItem.heapSize());<a name="line.465"></a>
+<span class="sourceLineNo">466</span>      blocksByHFile.add(cacheKey);<a name="line.466"></a>
+<span class="sourceLineNo">467</span>    }<a name="line.467"></a>
+<span class="sourceLineNo">468</span>  }<a name="line.468"></a>
+<span class="sourceLineNo">469</span><a name="line.469"></a>
+<span class="sourceLineNo">470</span>  /**<a name="line.470"></a>
+<span class="sourceLineNo">471</span>   * Get the buffer of the block with the specified key.<a name="line.471"></a>
+<span class="sourceLineNo">472</span>   * @param key block's cache key<a name="line.472"></a>
+<span class="sourceLineNo">473</span>   * @param caching true if the caller caches blocks on cache misses<a name="line.473"></a>
+<span class="sourceLineNo">474</span>   * @param repeat Whether this is a repeat lookup for the same block<a name="line.474"></a>
+<span class="sourceLineNo">475</span>   * @param updateCacheMetrics Whether we should update cache metrics or not<a name="line.475"></a>
+<span class="sourceLineNo">476</span>   * @return buffer of specified cache key, or null if not in cache<a name="line.476"></a>
+<span class="sourceLineNo">477</span>   */<a name="line.477"></a>
+<span class="sourceLineNo">478</span>  @Override<a name="line.478"></a>
+<span class="sourceLineNo">479</span>  public Cacheable getBlock(BlockCacheKey key, boolean caching, boolean repeat,<a name="line.479"></a>
+<span class="sourceLineNo">480</span>      boolean updateCacheMetrics) {<a name="line.480"></a>
+<span class="sourceLineNo">481</span>    if (!cacheEnabled) {<a name="line.481"></a>
+<span class="sourceLineNo">482</span>      return null;<a name="line.482"></a>
+<span class="sourceLineNo">483</span>    }<a name="line.483"></a>
+<span class="sourceLineNo">484</span>    RAMQueueEntry re = ramCache.get(key);<a name="line.484"></a>
+<span class="sourceLineNo">485</span>    if (re != null) {<a name="line.485"></a>
+<span class="sourceLineNo">486</span>      if (updateCacheMetrics) {<a name="line.486"></a>
+<span class="sourceLineNo">487</span>        cacheStats.hit(caching, key.isPrimary(), key.getBlockType());<a name="line.487"></a>
+<span class="sourceLineNo">488</span>      }<a name="line.488"></a>
+<span class="sourceLineNo">489</span>      re.access(accessCount.incrementAndGet());<a name="line.489"></a>
+<span class="sourceLineNo">490</span>      return re.getData();<a name="line.490"></a>
+<span class="sourceLineNo">491</span>    }<a name="line.491"></a>
+<span class="sourceLineNo">492</span>    BucketEntry bucketEntry = backingMap.get(key);<a name="line.492"></a>
+<span class="sourceLineNo">493</span>    if (bucketEntry != null) {<a name="line.493"></a>
+<span class="sourceLineNo">494</span>      long start = System.nanoTime();<a name="line.494"></a>
+<span class="sourceLineNo">495</span>      ReentrantReadWriteLock lock = offsetLock.getLock(bucketEntry.offset());<a name="line.495"></a>
+<span class="sourceLineNo">496</span>      try {<a name="line.496"></a>
+<span class="sourceLineNo">497</span>        lock.readLock().lock();<a name="line.497"></a>
+<span class="sourceLineNo">498</span>        // We can not read here even if backingMap does contain the given key because its offset<a name="line.498"></a>
+<span class="sourceLineNo">499</span>        // maybe changed. If we lock BlockCacheKey instead of offset, then we can only check<a name="line.499"></a>
+<span class="sourceLineNo">500</span>        // existence here.<a name="line.500"></a>
+<span class="sourceLineNo">501</span>        if (bucketEntry.equals(backingMap.get(key))) {<a name="line.501"></a>
+<span class="sourceLineNo">502</span>          // TODO : change this area - should be removed after server cells and<a name="line.502"></a>
+<span class="sourceLineNo">503</span>          // 12295 are available<a name="line.503"></a>
+<span class="sourceLineNo">504</span>          int len = bucketEntry.getLength();<a name="line.504"></a>
+<span class="sourceLineNo">505</span>          if (LOG.isTraceEnabled()) {<a name="line.505"></a>
+<span class="sourceLineNo">506</span>            LOG.trace("Read offset=" + bucketEntry.offset() + ", len=" + len);<a name="line.506"></a>
+<span class="sourceLineNo">507</span>          }<a name="line.507"></a>
+<span class="sourceLineNo">508</span>          Cacheable cachedBlock = ioEngine.read(bucketEntry.offset(), len,<a name="line.508"></a>
+<span class="sourceLineNo">509</span>              bucketEntry.deserializerReference());<a name="line.509"></a>
+<span class="sourceLineNo">510</span>          long timeTaken = System.nanoTime() - start;<a name="line.510"></a>
+<span class="sourceLineNo">511</span>          if (updateCacheMetrics) {<a name="line.511"></a>
+<span class="sourceLineNo">512</span>            cacheStats.hit(caching, key.isPrimary(), key.getBlockType());<a name="line.512"></a>
+<span class="sourceLineNo">513</span>            cacheStats.ioHit(timeTaken);<a name="line.513"></a>
+<span class="sourceLineNo">514</span>          }<a name="line.514"></a>
+<span class="sourceLineNo">515</span>          if (cachedBlock.getMemoryType() == MemoryType.SHARED) {<a name="line.515"></a>
+<span class="sourceLineNo">516</span>            bucketEntry.incrementRefCountAndGet();<a name="line.516"></a>
+<span class="sourceLineNo">517</span>          }<a name="line.517"></a>
+<span class="sourceLineNo">518</span>          bucketEntry.access(accessCount.incrementAndGet());<a name="line.518"></a>
+<span class="sourceLineNo">519</span>          if (this.ioErrorStartTime &gt; 0) {<a name="line.519"></a>
+<span class="sourceLineNo">520</span>            ioErrorStartTime = -1;<a name="line.520"></a>
+<span class="sourceLineNo">521</span>          }<a name="line.521"></a>
+<span class="sourceLineNo">522</span>          return cachedBlock;<a name="line.522"></a>
+<span c

<TRUNCATED>

Mime
View raw message