You are viewing a plain text version of this content. The canonical link for it is here.
Posted to commits@hbase.apache.org by gi...@apache.org on 2018/08/02 19:52:00 UTC
[14/51] [partial] hbase-site git commit: Published site at
613d831429960348dc42c3bdb6ea5d31be15c81c.
http://git-wip-us.apache.org/repos/asf/hbase-site/blob/7cf6034b/devapidocs/src-html/org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html
----------------------------------------------------------------------
diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html b/devapidocs/src-html/org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html
index bd3c59e..21e240a 100644
--- a/devapidocs/src-html/org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html
+++ b/devapidocs/src-html/org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html
@@ -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<Integer> deserialiserMap = new UniqueIndexMap<>();<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> * <p><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<BlockCacheKey> blocksByHFile =<a name="line.208"></a>
-<span class="sourceLineNo">209</span> new ConcurrentSkipListSet<>(new Comparator<BlockCacheKey>() {<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() < 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 < 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 < 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 >= 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> * <p><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<BlockCacheKey> blocksByHFile =<a name="line.206"></a>
+<span class="sourceLineNo">207</span> new ConcurrentSkipListSet<>(new Comparator<BlockCacheKey>() {<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() < 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 < 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 < 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 >= 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 < writerThreads.length; ++i) {<a name="line.289"></a>
-<span class="sourceLineNo">290</span> writerQueues.add(new ArrayBlockingQueue<>(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<>();<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 < writerThreads.length; ++i) {<a name="line.287"></a>
+<span class="sourceLineNo">288</span> writerQueues.add(new ArrayBlockingQueue<>(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<>();<a name="line.292"></a>
+<span class="sourceLineNo">293</span><a name="line.293"></a>
+<span class="sourceLineNo">294</span> this.backingMap = new ConcurrentHashMap<>((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<>((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() && 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 < 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 <= 1 && acceptableFactor >= 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 <= 1 && minFactor >= 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 <= acceptableFactor, MIN_FACTOR_CONFIG_NAME + " must be <= " + ACCEPT_FACTOR_CONFIG_NAME);<a name="line.332"></a>
-<span class="sourceLineNo">333</span> Preconditions.checkArgument(extraFreeFactor >= 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 <= 1 && singleFactor >= 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 <= 1 && multiFactor >= 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 <= 1 && memoryFactor >= 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() && 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 < 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 <= 1 && acceptableFactor >= 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 <= 1 && minFactor >= 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 <= acceptableFactor, MIN_FACTOR_CONFIG_NAME + " must be <= " + ACCEPT_FACTOR_CONFIG_NAME);<a name="line.327"></a>
+<span class="sourceLineNo">328</span> Preconditions.checkArgument(extraFreeFactor >= 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 <= 1 && singleFactor >= 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 <= 1 && multiFactor >= 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 <= 1 && memoryFactor >= 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() & 0x7FFFFFFF) % writerQueues.size();<a name="line.453"></a>
-<span class="sourceLineNo">454</span> BlockingQueue<RAMQueueEntry> 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 > 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 && 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() & 0x7FFFFFFF) % writerQueues.size();<a name="line.448"></a>
+<span class="sourceLineNo">449</span> BlockingQueue<RAMQueueEntry> 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 > 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 class="sourceLineNo">523</span> }<a name="line.523"></a>
+<span class="sourceLi
<TRUNCATED>