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 <div class="subTitle">org.apache.hadoop.hbase.io.hfile.bucket</div>
 <h2 title="Class BucketCache" class="title">Class BucketCache</h2>
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 <li>org.apache.hadoop.hbase.io.hfile.bucket.BucketCache</li>
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 <dt>All Implemented Interfaces:</dt>
 <dd><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Iterable.html?is-external=true" title="class or interface in java.lang">Iterable</a>&lt;<a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/CachedBlock.html" title="interface in org.apache.hadoop.hbase.io.hfile">CachedBlock</a>&gt;, <a href="../../../../../../../org/apache/hadoop/hbase/io/HeapSize.html" title="interface in org.apache.hadoop.hbase.io">HeapSize</a>, <a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCache.html" title="interface in org.apache.hadoop.hbase.io.hfile">BlockCache</a></dd>
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 <pre>@InterfaceAudience.Private
 public class <a href="../../../../../../../src-html/org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#line.114">BucketCache</a>
 extends <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a>
 implements <a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCache.html" title="interface in org.apache.hadoop.hbase.io.hfile">BlockCache</a>, <a href="../../../../../../../org/apache/hadoop/hbase/io/HeapSize.html" title="interface in org.apache.hadoop.hbase.io">HeapSize</a></pre>
 <div class="block">BucketCache uses <a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketAllocator.html" title="class in org.apache.hadoop.hbase.io.hfile.bucket"><code>BucketAllocator</code></a> to allocate/free blocks, and uses BucketCache#ramCache
  and BucketCache#backingMap in order to determine if a given element is in the cache. The bucket
  cache can use off-heap memory <a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/ByteBufferIOEngine.html" title="class in org.apache.hadoop.hbase.io.hfile.bucket"><code>ByteBufferIOEngine</code></a> or mmap
  <a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/ExclusiveMemoryMmapIOEngine.html" title="class in org.apache.hadoop.hbase.io.hfile.bucket"><code>ExclusiveMemoryMmapIOEngine</code></a> or pmem <a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/SharedMemoryMmapIOEngine.html" title="class in org.apache.hadoop.hbase.io.hfile.bucket"><code>SharedMemoryMmapIOEngine</code></a> or local files
  <a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/FileIOEngine.html" title="class in org.apache.hadoop.hbase.io.hfile.bucket"><code>FileIOEngine</code></a> to store/read the block data.
  <p>
  Eviction is via a similar algorithm as used in
  <a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/LruBlockCache.html" title="class in org.apache.hadoop.hbase.io.hfile"><code>LruBlockCache</code></a>
  <p>
  BucketCache can be used as mainly a block cache (see
  <a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/CombinedBlockCache.html" title="class in org.apache.hadoop.hbase.io.hfile"><code>CombinedBlockCache</code></a>), combined with a BlockCache to
  decrease CMS GC and heap fragmentation.
  <p>
  It also can be used as a secondary cache (e.g. using a file on ssd/fusionio to store blocks) to
  enlarge cache space via a victim cache.</div>
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 <tr>
 <th class="colFirst" scope="col">Modifier and Type</th>
 <th class="colLast" scope="col">Class and Description</th>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><code>private class&nbsp;</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.BucketEntryGroup.html" title="class in org.apache.hadoop.hbase.io.hfile.bucket">BucketCache.BucketEntryGroup</a></span></code>
 <div class="block">Used to group bucket entries into priority buckets.</div>
 </td>
 </tr>
 <tr class="rowColor">
 <td class="colFirst"><code>(package private) static class&nbsp;</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.RAMCache.html" title="class in org.apache.hadoop.hbase.io.hfile.bucket">BucketCache.RAMCache</a></span></code>
 <div class="block">Wrapped the delegate ConcurrentMap with maintaining its block's reference count.</div>
 </td>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><code>(package private) static class&nbsp;</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.RAMQueueEntry.html" title="class in org.apache.hadoop.hbase.io.hfile.bucket">BucketCache.RAMQueueEntry</a></span></code>
 <div class="block">Block Entry stored in the memory with key,data and so on</div>
 </td>
 </tr>
 <tr class="rowColor">
 <td class="colFirst"><code>private static class&nbsp;</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.StatisticsThread.html" title="class in org.apache.hadoop.hbase.io.hfile.bucket">BucketCache.StatisticsThread</a></span></code>&nbsp;</td>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><code>(package private) class&nbsp;</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.WriterThread.html" title="class in org.apache.hadoop.hbase.io.hfile.bucket">BucketCache.WriterThread</a></span></code>&nbsp;</td>
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 <h3>Field Summary</h3>
 <table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="Field Summary table, listing fields, and an explanation">
 <caption><span>Fields</span><span class="tabEnd">&nbsp;</span></caption>
 <tr>
 <th class="colFirst" scope="col">Modifier and Type</th>
 <th class="colLast" scope="col">Field and Description</th>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><code>(package private) static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#ACCEPT_FACTOR_CONFIG_NAME">ACCEPT_FACTOR_CONFIG_NAME</a></span></code>&nbsp;</td>
 </tr>
 <tr class="rowColor">
 <td class="colFirst"><code>private float</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#acceptableFactor">acceptableFactor</a></span></code>
 <div class="block">Acceptable size of cache (no evictions if size < acceptable)</div>
 </td>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><code>private <a href="https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/atomic/AtomicLong.html?is-external=true" title="class or interface in java.util.concurrent.atomic">AtomicLong</a></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#accessCount">accessCount</a></span></code>
 <div class="block">Cache access count (sequential ID)</div>
 </td>
 </tr>
 <tr class="rowColor">
 <td class="colFirst"><code>private <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#algorithm">algorithm</a></span></code>
 <div class="block">Use <a href="https://docs.oracle.com/javase/8/docs/api/java/security/MessageDigest.html?is-external=true" title="class or interface in java.security"><code>MessageDigest</code></a> class's encryption algorithms to check persistent file
  integrity, default algorithm is MD5</div>
 </td>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><code>private static int</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#ALLOCATION_FAIL_LOG_TIME_PERIOD">ALLOCATION_FAIL_LOG_TIME_PERIOD</a></span></code>&nbsp;</td>
 </tr>
 <tr class="rowColor">
 <td class="colFirst"><code>private long</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#allocFailLogPrevTs">allocFailLogPrevTs</a></span></code>&nbsp;</td>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><code>(package private) <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</a>&lt;<a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCacheKey.html" title="class in org.apache.hadoop.hbase.io.hfile">BlockCacheKey</a>,<a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketEntry.html" title="class in org.apache.hadoop.hbase.io.hfile.bucket">BucketEntry</a>&gt;</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#backingMap">backingMap</a></span></code>&nbsp;</td>
 </tr>
 <tr class="rowColor">
 <td class="colFirst"><code>private <a href="https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/atomic/AtomicBoolean.html?is-external=true" title="class or interface in java.util.concurrent.atomic">AtomicBoolean</a></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#backingMapValidated">backingMapValidated</a></span></code>&nbsp;</td>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><code>private <a href="https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/atomic/LongAdder.html?is-external=true" title="class or interface in java.util.concurrent.atomic">LongAdder</a></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#blockNumber">blockNumber</a></span></code>
 <div class="block">Current number of cached elements</div>
 </td>
 </tr>
 <tr class="rowColor">
 <td class="colFirst"><code>(package private) <a href="https://docs.oracle.com/javase/8/docs/api/java/util/NavigableSet.html?is-external=true" title="class or interface in java.util">NavigableSet</a>&lt;<a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCacheKey.html" title="class in org.apache.hadoop.hbase.io.hfile">BlockCacheKey</a>&gt;</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#blocksByHFile">blocksByHFile</a></span></code>&nbsp;</td>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><code>private long</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#blockSize">blockSize</a></span></code>
 <div class="block">Approximate block size</div>
 </td>
 </tr>
 <tr class="rowColor">
 <td class="colFirst"><code>private <a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketAllocator.html" title="class in org.apache.hadoop.hbase.io.hfile.bucket">BucketAllocator</a></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#bucketAllocator">bucketAllocator</a></span></code>&nbsp;</td>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><code>private long</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#bucketcachePersistInterval">bucketcachePersistInterval</a></span></code>&nbsp;</td>
 </tr>
 <tr class="rowColor">
 <td class="colFirst"><code>private long</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#cacheCapacity">cacheCapacity</a></span></code>&nbsp;</td>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><code>private boolean</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#cacheEnabled">cacheEnabled</a></span></code>
 <div class="block">Flag if the cache is enabled or not...</div>
 </td>
 </tr>
 <tr class="rowColor">
 <td class="colFirst"><code>private <a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCachePersister.html" title="class in org.apache.hadoop.hbase.io.hfile.bucket">BucketCachePersister</a></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#cachePersister">cachePersister</a></span></code>&nbsp;</td>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><code>private <a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCacheStats.html" title="class in org.apache.hadoop.hbase.io.hfile.bucket">BucketCacheStats</a></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#cacheStats">cacheStats</a></span></code>&nbsp;</td>
 </tr>
 <tr class="rowColor">
 <td class="colFirst"><code>private static float</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#DEFAULT_ACCEPT_FACTOR">DEFAULT_ACCEPT_FACTOR</a></span></code>&nbsp;</td>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><code>private static int</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#DEFAULT_CACHE_WAIT_TIME">DEFAULT_CACHE_WAIT_TIME</a></span></code>&nbsp;</td>
 </tr>
 <tr class="rowColor">
 <td class="colFirst"><code>static int</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#DEFAULT_ERROR_TOLERATION_DURATION">DEFAULT_ERROR_TOLERATION_DURATION</a></span></code>&nbsp;</td>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><code>private static float</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#DEFAULT_EXTRA_FREE_FACTOR">DEFAULT_EXTRA_FREE_FACTOR</a></span></code>&nbsp;</td>
 </tr>
 <tr class="rowColor">
 <td class="colFirst"><code>private static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#DEFAULT_FILE_VERIFY_ALGORITHM">DEFAULT_FILE_VERIFY_ALGORITHM</a></span></code>&nbsp;</td>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><code>private static int</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#DEFAULT_FREE_ENTIRE_BLOCK_FACTOR">DEFAULT_FREE_ENTIRE_BLOCK_FACTOR</a></span></code>&nbsp;</td>
 </tr>
 <tr class="rowColor">
 <td class="colFirst"><code>(package private) static float</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#DEFAULT_MEMORY_FACTOR">DEFAULT_MEMORY_FACTOR</a></span></code>&nbsp;</td>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><code>(package private) static float</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#DEFAULT_MIN_FACTOR">DEFAULT_MIN_FACTOR</a></span></code>&nbsp;</td>
 </tr>
 <tr class="rowColor">
 <td class="colFirst"><code>(package private) static float</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#DEFAULT_MULTI_FACTOR">DEFAULT_MULTI_FACTOR</a></span></code>&nbsp;</td>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><code>private static long</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#DEFAULT_QUEUE_ADDITION_WAIT_TIME">DEFAULT_QUEUE_ADDITION_WAIT_TIME</a></span></code>&nbsp;</td>
 </tr>
 <tr class="rowColor">
 <td class="colFirst"><code>(package private) static float</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#DEFAULT_SINGLE_FACTOR">DEFAULT_SINGLE_FACTOR</a></span></code>
 <div class="block">Priority buckets</div>
 </td>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><code>(package private) static int</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#DEFAULT_WRITER_QUEUE_ITEMS">DEFAULT_WRITER_QUEUE_ITEMS</a></span></code>&nbsp;</td>
 </tr>
 <tr class="rowColor">
 <td class="colFirst"><code>(package private) static int</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#DEFAULT_WRITER_THREADS">DEFAULT_WRITER_THREADS</a></span></code>&nbsp;</td>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><code>(package private) static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#EXTRA_FREE_FACTOR_CONFIG_NAME">EXTRA_FREE_FACTOR_CONFIG_NAME</a></span></code>&nbsp;</td>
 </tr>
 <tr class="rowColor">
 <td class="colFirst"><code>private float</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#extraFreeFactor">extraFreeFactor</a></span></code>
 <div class="block">Free this floating point factor of extra blocks when evicting.</div>
 </td>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><code>private static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#FILE_VERIFY_ALGORITHM">FILE_VERIFY_ALGORITHM</a></span></code>&nbsp;</td>
 </tr>
 <tr class="rowColor">
 <td class="colFirst"><code>private boolean</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#freeInProgress">freeInProgress</a></span></code>
 <div class="block">Volatile boolean to track if free space is in process or not</div>
 </td>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><code>private <a href="https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/locks/Lock.html?is-external=true" title="class or interface in java.util.concurrent.locks">Lock</a></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#freeSpaceLock">freeSpaceLock</a></span></code>&nbsp;</td>
 </tr>
 <tr class="rowColor">
 <td class="colFirst"><code>(package private) <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>,<a href="../../../../../../../org/apache/hadoop/hbase/util/Pair.html" title="class in org.apache.hadoop.hbase.util">Pair</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>,<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Long.html?is-external=true" title="class or interface in java.lang">Long</a>&gt;&gt;</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#fullyCachedFiles">fullyCachedFiles</a></span></code>
 <div class="block">Map of hFile -> Region -> File size.</div>
 </td>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><code>private <a href="https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/atomic/LongAdder.html?is-external=true" title="class or interface in java.util.concurrent.atomic">LongAdder</a></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#heapSize">heapSize</a></span></code>&nbsp;</td>
 </tr>
 <tr class="rowColor">
 <td class="colFirst"><code>(package private) <a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/IOEngine.html" title="interface in org.apache.hadoop.hbase.io.hfile.bucket">IOEngine</a></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#ioEngine">ioEngine</a></span></code>&nbsp;</td>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><code>private long</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#ioErrorStartTime">ioErrorStartTime</a></span></code>&nbsp;</td>
 </tr>
 <tr class="rowColor">
 <td class="colFirst"><code>private int</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#ioErrorsTolerationDuration">ioErrorsTolerationDuration</a></span></code>
 <div class="block">Duration of IO errors tolerated before we disable cache, 1 min as default</div>
 </td>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><code>(package private) static <a href="https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/atomic/AtomicBoolean.html?is-external=true" title="class or interface in java.util.concurrent.atomic">AtomicBoolean</a></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#isCacheInconsistent">isCacheInconsistent</a></span></code>&nbsp;</td>
 </tr>
 <tr class="rowColor">
 <td class="colFirst"><code>private static org.slf4j.Logger</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#LOG">LOG</a></span></code>&nbsp;</td>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><code>(package private) static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#MEMORY_FACTOR_CONFIG_NAME">MEMORY_FACTOR_CONFIG_NAME</a></span></code>&nbsp;</td>
 </tr>
 <tr class="rowColor">
 <td class="colFirst"><code>private float</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#memoryFactor">memoryFactor</a></span></code>
 <div class="block">In-memory bucket size</div>
 </td>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><code>(package private) static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#MIN_FACTOR_CONFIG_NAME">MIN_FACTOR_CONFIG_NAME</a></span></code>&nbsp;</td>
 </tr>
 <tr class="rowColor">
 <td class="colFirst"><code>private float</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#minFactor">minFactor</a></span></code>
 <div class="block">Minimum threshold of cache (when evicting, evict until size < min)</div>
 </td>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><code>(package private) static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#MULTI_FACTOR_CONFIG_NAME">MULTI_FACTOR_CONFIG_NAME</a></span></code>&nbsp;</td>
 </tr>
 <tr class="rowColor">
 <td class="colFirst"><code>private float</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#multiFactor">multiFactor</a></span></code>
 <div class="block">Multiple access bucket size</div>
 </td>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><code>(package private) <a href="../../../../../../../org/apache/hadoop/hbase/util/IdReadWriteLock.html" title="class in org.apache.hadoop.hbase.util">IdReadWriteLock</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Long.html?is-external=true" title="class or interface in java.lang">Long</a>&gt;</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#offsetLock">offsetLock</a></span></code>
 <div class="block">A ReentrantReadWriteLock to lock on a particular block identified by offset.</div>
 </td>
 </tr>
 <tr class="rowColor">
 <td class="colFirst"><code>private <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#persistencePath">persistencePath</a></span></code>&nbsp;</td>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><code>private static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#QUEUE_ADDITION_WAIT_TIME">QUEUE_ADDITION_WAIT_TIME</a></span></code>&nbsp;</td>
 </tr>
 <tr class="rowColor">
 <td class="colFirst"><code>private long</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#queueAdditionWaitTime">queueAdditionWaitTime</a></span></code>&nbsp;</td>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><code>(package private) <a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.RAMCache.html" title="class in org.apache.hadoop.hbase.io.hfile.bucket">BucketCache.RAMCache</a></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#ramCache">ramCache</a></span></code>&nbsp;</td>
 </tr>
 <tr class="rowColor">
 <td class="colFirst"><code>private <a href="https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/atomic/LongAdder.html?is-external=true" title="class or interface in java.util.concurrent.atomic">LongAdder</a></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#realCacheSize">realCacheSize</a></span></code>&nbsp;</td>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><code>(package private) <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>,<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Long.html?is-external=true" title="class or interface in java.lang">Long</a>&gt;</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#regionCachedSize">regionCachedSize</a></span></code>
 <div class="block">Map of region -> total size of the region prefetched on this region server.</div>
 </td>
 </tr>
 <tr class="rowColor">
 <td class="colFirst"><code>private <a href="https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/ScheduledExecutorService.html?is-external=true" title="class or interface in java.util.concurrent">ScheduledExecutorService</a></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#scheduleThreadPool">scheduleThreadPool</a></span></code>
 <div class="block">Statistics thread schedule pool (for heavy debugging, could remove)</div>
 </td>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><code>(package private) static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#SINGLE_FACTOR_CONFIG_NAME">SINGLE_FACTOR_CONFIG_NAME</a></span></code>
 <div class="block">Priority buckets config</div>
 </td>
 </tr>
 <tr class="rowColor">
 <td class="colFirst"><code>private float</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#singleFactor">singleFactor</a></span></code>
 <div class="block">Single access bucket size</div>
 </td>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><code>private static int</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#statThreadPeriod">statThreadPeriod</a></span></code>
 <div class="block">Statistics thread</div>
 </td>
 </tr>
 <tr class="rowColor">
 <td class="colFirst"><code>private static boolean</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#STRONG_REF_DEFAULT">STRONG_REF_DEFAULT</a></span></code>&nbsp;</td>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><code>private static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#STRONG_REF_KEY">STRONG_REF_KEY</a></span></code>
 <div class="block">Use strong reference for offsetLock or not</div>
 </td>
 </tr>
 <tr class="rowColor">
 <td class="colFirst"><code>(package private) <a href="https://docs.oracle.com/javase/8/docs/api/java/util/ArrayList.html?is-external=true" title="class or interface in java.util">ArrayList</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/BlockingQueue.html?is-external=true" title="class or interface in java.util.concurrent">BlockingQueue</a>&lt;<a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.RAMQueueEntry.html" title="class in org.apache.hadoop.hbase.io.hfile.bucket">BucketCache.RAMQueueEntry</a>&gt;&gt;</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#writerQueues">writerQueues</a></span></code>
 <div class="block">A list of writer queues.</div>
 </td>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><code>(package private) <a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.WriterThread.html" title="class in org.apache.hadoop.hbase.io.hfile.bucket">BucketCache.WriterThread</a>[]</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#writerThreads">writerThreads</a></span></code>&nbsp;</td>
 </tr>
 </table>
 </li>
 </ul>
 <!-- ======== CONSTRUCTOR SUMMARY ======== -->
 <ul class="blockList">
 <li class="blockList"><a name="constructor.summary">
 <!--   -->
 </a>
 <h3>Constructor Summary</h3>
 <table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="Constructor Summary table, listing constructors, and an explanation">
 <caption><span>Constructors</span><span class="tabEnd">&nbsp;</span></caption>
 <tr>
 <th class="colOne" scope="col">Constructor and Description</th>
 </tr>
 <tr class="altColor">
 <td class="colOne"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#BucketCache-java.lang.String-long-int-int:A-int-int-java.lang.String-">BucketCache</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;ioEngineName,
            long&nbsp;capacity,
            int&nbsp;blockSize,
            int[]&nbsp;bucketSizes,
            int&nbsp;writerThreadNum,
            int&nbsp;writerQLen,
            <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;persistencePath)</code>&nbsp;</td>
 </tr>
 <tr class="rowColor">
 <td class="colOne"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#BucketCache-java.lang.String-long-int-int:A-int-int-java.lang.String-int-org.apache.hadoop.conf.Configuration-">BucketCache</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;ioEngineName,
            long&nbsp;capacity,
            int&nbsp;blockSize,
            int[]&nbsp;bucketSizes,
            int&nbsp;writerThreadNum,
            int&nbsp;writerQLen,
            <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;persistencePath,
            int&nbsp;ioErrorsTolerationDuration,
            org.apache.hadoop.conf.Configuration&nbsp;conf)</code>&nbsp;</td>
 </tr>
 </table>
 </li>
 </ul>
 <!-- ========== METHOD SUMMARY =========== -->
 <ul class="blockList">
 <li class="blockList"><a name="method.summary">
 <!--   -->
 </a>
 <h3>Method Summary</h3>
 <table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="Method Summary table, listing methods, and an explanation">
 <caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd">&nbsp;</span></span><span id="t1" class="tableTab"><span><a href="javascript:show(1);">Static Methods</a></span><span class="tabEnd">&nbsp;</span></span><span id="t2" class="tableTab"><span><a href="javascript:show(2);">Instance Methods</a></span><span class="tabEnd">&nbsp;</span></span><span id="t4" class="tableTab"><span><a href="javascript:show(8);">Concrete Methods</a></span><span class="tabEnd">&nbsp;</span></span></caption>
 <tr>
 <th class="colFirst" scope="col">Modifier and Type</th>
 <th class="colLast" scope="col">Method and Description</th>
 </tr>
 <tr id="i0" class="altColor">
 <td class="colFirst"><code>long</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#acceptableSize--">acceptableSize</a></span>()</code>&nbsp;</td>
 </tr>
 <tr id="i1" class="rowColor">
 <td class="colFirst"><code>(package private) void</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#blockEvicted-org.apache.hadoop.hbase.io.hfile.BlockCacheKey-org.apache.hadoop.hbase.io.hfile.bucket.BucketEntry-boolean-boolean-">blockEvicted</a></span>(<a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCacheKey.html" title="class in org.apache.hadoop.hbase.io.hfile">BlockCacheKey</a>&nbsp;cacheKey,
             <a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketEntry.html" title="class in org.apache.hadoop.hbase.io.hfile.bucket">BucketEntry</a>&nbsp;bucketEntry,
             boolean&nbsp;decrementBlockNumber,
             boolean&nbsp;evictedByEvictionProcess)</code>
 <div class="block">This method is invoked after the bucketEntry is removed from <a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#backingMap"><code>backingMap</code></a></div>
 </td>
 </tr>
 <tr id="i2" class="altColor">
 <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/Optional.html?is-external=true" title="class or interface in java.util">Optional</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Boolean.html?is-external=true" title="class or interface in java.lang">Boolean</a>&gt;</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#blockFitsIntoTheCache-org.apache.hadoop.hbase.io.hfile.HFileBlock-">blockFitsIntoTheCache</a></span>(<a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/HFileBlock.html" title="class in org.apache.hadoop.hbase.io.hfile">HFileBlock</a>&nbsp;block)</code>
 <div class="block">Checks whether there's enough space left in the cache to accommodate the passed block.</div>
 </td>
 </tr>
 <tr id="i3" class="rowColor">
 <td class="colFirst"><code>private int</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#bucketSizesAboveThresholdCount-float-">bucketSizesAboveThresholdCount</a></span>(float&nbsp;minFactor)</code>
 <div class="block">Return the count of bucketSizeinfos still need free space</div>
 </td>
 </tr>
 <tr id="i4" class="altColor">
 <td class="colFirst"><code>void</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#cacheBlock-org.apache.hadoop.hbase.io.hfile.BlockCacheKey-org.apache.hadoop.hbase.io.hfile.Cacheable-">cacheBlock</a></span>(<a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCacheKey.html" title="class in org.apache.hadoop.hbase.io.hfile">BlockCacheKey</a>&nbsp;cacheKey,
           <a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/Cacheable.html" title="interface in org.apache.hadoop.hbase.io.hfile">Cacheable</a>&nbsp;buf)</code>
 <div class="block">Cache the block with the specified name and buffer.</div>
 </td>
 </tr>
 <tr id="i5" class="rowColor">
 <td class="colFirst"><code>void</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#cacheBlock-org.apache.hadoop.hbase.io.hfile.BlockCacheKey-org.apache.hadoop.hbase.io.hfile.Cacheable-boolean-">cacheBlock</a></span>(<a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCacheKey.html" title="class in org.apache.hadoop.hbase.io.hfile">BlockCacheKey</a>&nbsp;cacheKey,
           <a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/Cacheable.html" title="interface in org.apache.hadoop.hbase.io.hfile">Cacheable</a>&nbsp;cachedItem,
           boolean&nbsp;inMemory)</code>
 <div class="block">Cache the block with the specified name and buffer.</div>
 </td>
 </tr>
 <tr id="i6" class="altColor">
 <td class="colFirst"><code>void</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#cacheBlock-org.apache.hadoop.hbase.io.hfile.BlockCacheKey-org.apache.hadoop.hbase.io.hfile.Cacheable-boolean-boolean-">cacheBlock</a></span>(<a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCacheKey.html" title="class in org.apache.hadoop.hbase.io.hfile">BlockCacheKey</a>&nbsp;cacheKey,
           <a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/Cacheable.html" title="interface in org.apache.hadoop.hbase.io.hfile">Cacheable</a>&nbsp;cachedItem,
           boolean&nbsp;inMemory,
           boolean&nbsp;waitWhenCache)</code>
 <div class="block">Cache the block with the specified name and buffer.</div>
 </td>
 </tr>
 <tr id="i7" class="rowColor">
 <td class="colFirst"><code>void</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#cacheBlockWithWait-org.apache.hadoop.hbase.io.hfile.BlockCacheKey-org.apache.hadoop.hbase.io.hfile.Cacheable-boolean-boolean-">cacheBlockWithWait</a></span>(<a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCacheKey.html" title="class in org.apache.hadoop.hbase.io.hfile">BlockCacheKey</a>&nbsp;cacheKey,
                   <a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/Cacheable.html" title="interface in org.apache.hadoop.hbase.io.hfile">Cacheable</a>&nbsp;cachedItem,
                   boolean&nbsp;inMemory,
                   boolean&nbsp;wait)</code>
 <div class="block">Cache the block to ramCache</div>
 </td>
 </tr>
 <tr id="i8" class="altColor">
 <td class="colFirst"><code>protected void</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#cacheBlockWithWaitInternal-org.apache.hadoop.hbase.io.hfile.BlockCacheKey-org.apache.hadoop.hbase.io.hfile.Cacheable-boolean-boolean-">cacheBlockWithWaitInternal</a></span>(<a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCacheKey.html" title="class in org.apache.hadoop.hbase.io.hfile">BlockCacheKey</a>&nbsp;cacheKey,
                           <a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/Cacheable.html" title="interface in org.apache.hadoop.hbase.io.hfile">Cacheable</a>&nbsp;cachedItem,
                           boolean&nbsp;inMemory,
                           boolean&nbsp;wait)</code>&nbsp;</td>
 </tr>
 <tr id="i9" class="rowColor">
 <td class="colFirst"><code>private void</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#checkIOErrorIsTolerated--">checkIOErrorIsTolerated</a></span>()</code>
 <div class="block">Check whether we tolerate IO error this time.</div>
 </td>
 </tr>
 <tr id="i10" class="altColor">
 <td class="colFirst"><code>private <a href="../../../../../../../org/apache/hadoop/hbase/io/ByteBuffAllocator.Recycler.html" title="interface in org.apache.hadoop.hbase.io">ByteBuffAllocator.Recycler</a></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#createRecycler-org.apache.hadoop.hbase.io.hfile.bucket.BucketEntry-">createRecycler</a></span>(<a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketEntry.html" title="class in org.apache.hadoop.hbase.io.hfile.bucket">BucketEntry</a>&nbsp;bucketEntry)</code>
 <div class="block">
  Create the <a href="../../../../../../../org/apache/hadoop/hbase/io/ByteBuffAllocator.Recycler.html" title="interface in org.apache.hadoop.hbase.io"><code>ByteBuffAllocator.Recycler</code></a> for <a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketEntry.html#refCnt"><code>BucketEntry.refCnt</code></a>,which would be used as
  <a href="../../../../../../../org/apache/hadoop/hbase/nio/RefCnt.html#recycler"><code>RefCnt.recycler</code></a> of <code>HFileBlock#buf</code> returned from <a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#getBlock-org.apache.hadoop.hbase.io.hfile.BlockCacheKey-boolean-boolean-boolean-"><code>getBlock(org.apache.hadoop.hbase.io.hfile.BlockCacheKey, boolean, boolean, boolean)</code></a>.</div>
 </td>
 </tr>
 <tr id="i11" class="rowColor">
 <td class="colFirst"><code>private <a href="https://docs.oracle.com/javase/8/docs/api/java/io/FileInputStream.html?is-external=true" title="class or interface in java.io">FileInputStream</a></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#deleteFileOnClose-java.io.File-">deleteFileOnClose</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/io/File.html?is-external=true" title="class or interface in java.io">File</a>&nbsp;file)</code>
 <div class="block">Create an input stream that deletes the file after reading it.</div>
 </td>
 </tr>
 <tr id="i12" class="altColor">
 <td class="colFirst"><code>private void</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#disableCache--">disableCache</a></span>()</code>
 <div class="block">Used to shut down the cache -or- turn it off in the case of something broken.</div>
 </td>
 </tr>
 <tr id="i13" class="rowColor">
 <td class="colFirst"><code>(package private) void</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#doDrain-java.util.List-java.nio.ByteBuffer-">doDrain</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.RAMQueueEntry.html" title="class in org.apache.hadoop.hbase.io.hfile.bucket">BucketCache.RAMQueueEntry</a>&gt;&nbsp;entries,
        <a href="https://docs.oracle.com/javase/8/docs/api/java/nio/ByteBuffer.html?is-external=true" title="class or interface in java.nio">ByteBuffer</a>&nbsp;metaBuff)</code>
 <div class="block">Flush the entries in ramCache to IOEngine and add bucket entry to backingMap.</div>
 </td>
 </tr>
 <tr id="i14" class="altColor">
 <td class="colFirst"><code>private boolean</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#doEvictBlock-org.apache.hadoop.hbase.io.hfile.BlockCacheKey-org.apache.hadoop.hbase.io.hfile.bucket.BucketEntry-boolean-">doEvictBlock</a></span>(<a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCacheKey.html" title="class in org.apache.hadoop.hbase.io.hfile">BlockCacheKey</a>&nbsp;cacheKey,
             <a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketEntry.html" title="class in org.apache.hadoop.hbase.io.hfile.bucket">BucketEntry</a>&nbsp;bucketEntry,
             boolean&nbsp;evictedByEvictionProcess)</code>
 <div class="block">Evict the <a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCacheKey.html" title="class in org.apache.hadoop.hbase.io.hfile"><code>BlockCacheKey</code></a> and <a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketEntry.html" title="class in org.apache.hadoop.hbase.io.hfile.bucket"><code>BucketEntry</code></a> from <a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#backingMap"><code>backingMap</code></a> and
  <a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#ramCache"><code>ramCache</code></a>.</div>
 </td>
 </tr>
 <tr id="i15" class="rowColor">
 <td class="colFirst"><code>private void</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#dumpPrefetchList--">dumpPrefetchList</a></span>()</code>&nbsp;</td>
 </tr>
 <tr id="i16" class="altColor">
 <td class="colFirst"><code>boolean</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#evictBlock-org.apache.hadoop.hbase.io.hfile.BlockCacheKey-">evictBlock</a></span>(<a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCacheKey.html" title="class in org.apache.hadoop.hbase.io.hfile">BlockCacheKey</a>&nbsp;cacheKey)</code>
 <div class="block">Try to evict the block from <a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCache.html" title="interface in org.apache.hadoop.hbase.io.hfile"><code>BlockCache</code></a> by force.</div>
 </td>
 </tr>
 <tr id="i17" class="rowColor">
 <td class="colFirst"><code>boolean</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#evictBlockIfNoRpcReferenced-org.apache.hadoop.hbase.io.hfile.BlockCacheKey-">evictBlockIfNoRpcReferenced</a></span>(<a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCacheKey.html" title="class in org.apache.hadoop.hbase.io.hfile">BlockCacheKey</a>&nbsp;blockCacheKey)</code>
 <div class="block">NOTE: This method is only for test.</div>
 </td>
 </tr>
 <tr id="i18" class="altColor">
 <td class="colFirst"><code>int</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#evictBlocksByHfileName-java.lang.String-">evictBlocksByHfileName</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;hfileName)</code>
 <div class="block">Evicts all blocks for a specific HFile.</div>
 </td>
 </tr>
 <tr id="i19" class="rowColor">
 <td class="colFirst"><code>(package private) boolean</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#evictBucketEntryIfNoRpcReferenced-org.apache.hadoop.hbase.io.hfile.BlockCacheKey-org.apache.hadoop.hbase.io.hfile.bucket.BucketEntry-">evictBucketEntryIfNoRpcReferenced</a></span>(<a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCacheKey.html" title="class in org.apache.hadoop.hbase.io.hfile">BlockCacheKey</a>&nbsp;blockCacheKey,
                                  <a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketEntry.html" title="class in org.apache.hadoop.hbase.io.hfile.bucket">BucketEntry</a>&nbsp;bucketEntry)</code>
 <div class="block">Evict <a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCacheKey.html" title="class in org.apache.hadoop.hbase.io.hfile"><code>BlockCacheKey</code></a> and its corresponding <a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketEntry.html" title="class in org.apache.hadoop.hbase.io.hfile.bucket"><code>BucketEntry</code></a> only if
  <a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketEntry.html#isRpcRef--"><code>BucketEntry.isRpcRef()</code></a> is false.</div>
 </td>
 </tr>
 <tr id="i20" class="altColor">
 <td class="colFirst"><code>void</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#fileCacheCompleted-org.apache.hadoop.fs.Path-long-">fileCacheCompleted</a></span>(org.apache.hadoop.fs.Path&nbsp;filePath,
                   long&nbsp;size)</code>&nbsp;</td>
 </tr>
 <tr id="i21" class="rowColor">
 <td class="colFirst"><code>private void</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#fileNotFullyCached-java.lang.String-">fileNotFullyCached</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;hfileName)</code>&nbsp;</td>
 </tr>
 <tr id="i22" class="altColor">
 <td class="colFirst"><code>protected void</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#finalize--">finalize</a></span>()</code>
 <div class="block">Needed mostly for UTs that might run in the same VM and create different BucketCache instances
  on different UT methods.</div>
 </td>
 </tr>
 <tr id="i23" class="rowColor">
 <td class="colFirst"><code>(package private) void</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#freeBucketEntry-org.apache.hadoop.hbase.io.hfile.bucket.BucketEntry-">freeBucketEntry</a></span>(<a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketEntry.html" title="class in org.apache.hadoop.hbase.io.hfile.bucket">BucketEntry</a>&nbsp;bucketEntry)</code>
 <div class="block">Free the {<a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketEntry.html" title="class in org.apache.hadoop.hbase.io.hfile.bucket"><code>BucketEntry</code></a> actually,which could only be invoked when the
  <a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketEntry.html#refCnt"><code>BucketEntry.refCnt</code></a> becoming 0.</div>
 </td>
 </tr>
 <tr id="i24" class="altColor">
 <td class="colFirst"><code>private void</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#freeEntireBuckets-int-">freeEntireBuckets</a></span>(int&nbsp;completelyFreeBucketsNeeded)</code>
 <div class="block">This method will find the buckets that are minimally occupied and are not reference counted and
  will free them completely without any constraint on the access times of the elements, and as a
  process will completely free at most the number of buckets passed, sometimes it might not due
  to changing refCounts</div>
 </td>
 </tr>
 <tr id="i25" class="rowColor">
 <td class="colFirst"><code>(package private) void</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#freeSpace-java.lang.String-">freeSpace</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;why)</code>
 <div class="block">Free the space if the used size reaches acceptableSize() or one size block couldn't be
  allocated.</div>
 </td>
 </tr>
 <tr id="i26" class="altColor">
 <td class="colFirst"><code>(package private) float</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#getAcceptableFactor--">getAcceptableFactor</a></span>()</code>&nbsp;</td>
 </tr>
 <tr id="i27" class="rowColor">
 <td class="colFirst"><code>protected <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#getAlgorithm--">getAlgorithm</a></span>()</code>&nbsp;</td>
 </tr>
 <tr id="i28" class="altColor">
 <td class="colFirst"><code>private <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Set.html?is-external=true" title="class or interface in java.util">Set</a>&lt;<a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCacheKey.html" title="class in org.apache.hadoop.hbase.io.hfile">BlockCacheKey</a>&gt;</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#getAllCacheKeysForFile-java.lang.String-">getAllCacheKeysForFile</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;hfileName)</code>&nbsp;</td>
 </tr>
 <tr id="i29" class="rowColor">
 <td class="colFirst"><code>private static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#getAllocationFailWarningMessage-org.apache.hadoop.hbase.io.hfile.bucket.BucketAllocatorException-org.apache.hadoop.hbase.io.hfile.bucket.BucketCache.RAMQueueEntry-">getAllocationFailWarningMessage</a></span>(<a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketAllocatorException.html" title="class in org.apache.hadoop.hbase.io.hfile.bucket">BucketAllocatorException</a>&nbsp;fle,
                                <a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.RAMQueueEntry.html" title="class in org.apache.hadoop.hbase.io.hfile.bucket">BucketCache.RAMQueueEntry</a>&nbsp;re)</code>
 <div class="block">Prepare and return a warning message for Bucket Allocator Exception</div>
 </td>
 </tr>
 <tr id="i30" class="altColor">
 <td class="colFirst"><code><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketAllocator.html" title="class in org.apache.hadoop.hbase.io.hfile.bucket">BucketAllocator</a></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#getAllocator--">getAllocator</a></span>()</code>&nbsp;</td>
 </tr>
 <tr id="i31" class="rowColor">
 <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</a>&lt;<a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCacheKey.html" title="class in org.apache.hadoop.hbase.io.hfile">BlockCacheKey</a>,<a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketEntry.html" title="class in org.apache.hadoop.hbase.io.hfile.bucket">BucketEntry</a>&gt;</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#getBackingMap--">getBackingMap</a></span>()</code>&nbsp;</td>
 </tr>
 <tr id="i32" class="altColor">
 <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/atomic/AtomicBoolean.html?is-external=true" title="class or interface in java.util.concurrent.atomic">AtomicBoolean</a></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#getBackingMapValidated--">getBackingMapValidated</a></span>()</code>&nbsp;</td>
 </tr>
 <tr id="i33" class="rowColor">
 <td class="colFirst"><code><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/Cacheable.html" title="interface in org.apache.hadoop.hbase.io.hfile">Cacheable</a></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#getBlock-org.apache.hadoop.hbase.io.hfile.BlockCacheKey-boolean-boolean-boolean-">getBlock</a></span>(<a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCacheKey.html" title="class in org.apache.hadoop.hbase.io.hfile">BlockCacheKey</a>&nbsp;key,
         boolean&nbsp;caching,
         boolean&nbsp;repeat,
         boolean&nbsp;updateCacheMetrics)</code>
 <div class="block">Get the buffer of the block with the specified key.</div>
 </td>
 </tr>
 <tr id="i34" class="altColor">
 <td class="colFirst"><code><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCache.html" title="interface in org.apache.hadoop.hbase.io.hfile">BlockCache</a>[]</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#getBlockCaches--">getBlockCaches</a></span>()</code>
 <div class="block">Returns The list of sub blockcaches that make up this one; returns null if no sub caches.</div>
 </td>
 </tr>
 <tr id="i35" class="rowColor">
 <td class="colFirst"><code>long</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#getBlockCount--">getBlockCount</a></span>()</code>
 <div class="block">Returns the number of blocks currently cached in the block cache.</div>
 </td>
 </tr>
 <tr id="i36" class="altColor">
 <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/Optional.html?is-external=true" title="class or interface in java.util">Optional</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Integer.html?is-external=true" title="class or interface in java.lang">Integer</a>&gt;</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#getBlockSize-org.apache.hadoop.hbase.io.hfile.BlockCacheKey-">getBlockSize</a></span>(<a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCacheKey.html" title="class in org.apache.hadoop.hbase.io.hfile">BlockCacheKey</a>&nbsp;key)</code>
 <div class="block">Returns an Optional containing the size of the block related to the passed key.</div>
 </td>
 </tr>
 <tr id="i37" class="rowColor">
 <td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Optional.html?is-external=true" title="class or interface in java.util">Optional</a>&lt;<a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html" title="class in org.apache.hadoop.hbase.io.hfile.bucket">BucketCache</a>&gt;</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#getBucketCacheFromCacheConfig-org.apache.hadoop.hbase.io.hfile.CacheConfig-">getBucketCacheFromCacheConfig</a></span>(<a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/CacheConfig.html" title="class in org.apache.hadoop.hbase.io.hfile">CacheConfig</a>&nbsp;cacheConf)</code>&nbsp;</td>
 </tr>
 <tr id="i38" class="altColor">
 <td class="colFirst"><code>long</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#getCurrentDataSize--">getCurrentDataSize</a></span>()</code>
 <div class="block">Returns the occupied size of data blocks, in bytes.</div>
 </td>
 </tr>
 <tr id="i39" class="rowColor">
 <td class="colFirst"><code>long</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#getCurrentSize--">getCurrentSize</a></span>()</code>
 <div class="block">Returns the occupied size of the block cache, in bytes.</div>
 </td>
 </tr>
 <tr id="i40" class="altColor">
 <td class="colFirst"><code>long</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#getDataBlockCount--">getDataBlockCount</a></span>()</code>
 <div class="block">Returns the number of data blocks currently cached in the block cache.</div>
 </td>
 </tr>
 <tr id="i41" class="rowColor">
 <td class="colFirst"><code>(package private) float</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#getExtraFreeFactor--">getExtraFreeFactor</a></span>()</code>&nbsp;</td>
 </tr>
 <tr id="i42" class="altColor">
 <td class="colFirst"><code>long</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#getFreeSize--">getFreeSize</a></span>()</code>
 <div class="block">Returns the free size of the block cache, in bytes.</div>
 </td>
 </tr>
 <tr id="i43" class="rowColor">
 <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/Optional.html?is-external=true" title="class or interface in java.util">Optional</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>,<a href="../../../../../../../org/apache/hadoop/hbase/util/Pair.html" title="class in org.apache.hadoop.hbase.util">Pair</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>,<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Long.html?is-external=true" title="class or interface in java.lang">Long</a>&gt;&gt;&gt;</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#getFullyCachedFiles--">getFullyCachedFiles</a></span>()</code>
 <div class="block">Returns an Optional containing the map of files that have been fully cached (all its blocks are
  present in the cache.</div>
 </td>
 </tr>
 <tr id="i44" class="altColor">
 <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#getIoEngine--">getIoEngine</a></span>()</code>&nbsp;</td>
 </tr>
 <tr id="i45" class="rowColor">
 <td class="colFirst"><code>private <a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/IOEngine.html" title="interface in org.apache.hadoop.hbase.io.hfile.bucket">IOEngine</a></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#getIOEngineFromName-java.lang.String-long-java.lang.String-">getIOEngineFromName</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;ioEngineName,
                    long&nbsp;capacity,
                    <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;persistencePath)</code>
 <div class="block">Get the IOEngine from the IO engine name</div>
 </td>
 </tr>
 <tr id="i46" class="altColor">
 <td class="colFirst"><code>long</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#getMaxSize--">getMaxSize</a></span>()</code>
 <div class="block">Returns the Max size of the block cache, in bytes.</div>
 </td>
 </tr>
 <tr id="i47" class="rowColor">
 <td class="colFirst"><code>(package private) float</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#getMemoryFactor--">getMemoryFactor</a></span>()</code>&nbsp;</td>
 </tr>
 <tr id="i48" class="altColor">
 <td class="colFirst"><code>(package private) float</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#getMinFactor--">getMinFactor</a></span>()</code>&nbsp;</td>
 </tr>
 <tr id="i49" class="rowColor">
 <td class="colFirst"><code>(package private) float</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#getMultiFactor--">getMultiFactor</a></span>()</code>&nbsp;</td>
 </tr>
 <tr id="i50" class="altColor">
 <td class="colFirst"><code>(package private) long</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#getPartitionSize-float-">getPartitionSize</a></span>(float&nbsp;partitionFactor)</code>&nbsp;</td>
 </tr>
 <tr id="i51" class="rowColor">
 <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#getPersistencePath--">getPersistencePath</a></span>()</code>&nbsp;</td>
 </tr>
 <tr id="i52" class="altColor">
 <td class="colFirst"><code>(package private) static <a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.RAMQueueEntry.html" title="class in org.apache.hadoop.hbase.io.hfile.bucket">BucketCache.RAMQueueEntry</a>&gt;</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#getRAMQueueEntries-java.util.concurrent.BlockingQueue-java.util.List-">getRAMQueueEntries</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/BlockingQueue.html?is-external=true" title="class or interface in java.util.concurrent">BlockingQueue</a>&lt;<a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.RAMQueueEntry.html" title="class in org.apache.hadoop.hbase.io.hfile.bucket">BucketCache.RAMQueueEntry</a>&gt;&nbsp;q,
                   <a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.RAMQueueEntry.html" title="class in org.apache.hadoop.hbase.io.hfile.bucket">BucketCache.RAMQueueEntry</a>&gt;&nbsp;receptacle)</code>
 <div class="block">Blocks until elements available in <code>q</code> then tries to grab as many as possible before
  returning.</div>
 </td>
 </tr>
 <tr id="i53" class="rowColor">
 <td class="colFirst"><code>long</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#getRealCacheSize--">getRealCacheSize</a></span>()</code>&nbsp;</td>
 </tr>
 <tr id="i54" class="altColor">
 <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/Optional.html?is-external=true" title="class or interface in java.util">Optional</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>,<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Long.html?is-external=true" title="class or interface in java.lang">Long</a>&gt;&gt;</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#getRegionCachedInfo--">getRegionCachedInfo</a></span>()</code>
 <div class="block">Returns an Optional containing a map of regions and the percentage of how much of it has been
  cached so far.</div>
 </td>
 </tr>
 <tr id="i55" class="rowColor">
 <td class="colFirst"><code>int</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#getRpcRefCount-org.apache.hadoop.hbase.io.hfile.BlockCacheKey-">getRpcRefCount</a></span>(<a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCacheKey.html" title="class in org.apache.hadoop.hbase.io.hfile">BlockCacheKey</a>&nbsp;cacheKey)</code>&nbsp;</td>
 </tr>
 <tr id="i56" class="altColor">
 <td class="colFirst"><code>(package private) float</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#getSingleFactor--">getSingleFactor</a></span>()</code>&nbsp;</td>
 </tr>
 <tr id="i57" class="rowColor">
 <td class="colFirst"><code><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/CacheStats.html" title="class in org.apache.hadoop.hbase.io.hfile">CacheStats</a></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#getStats--">getStats</a></span>()</code>
 <div class="block">Get the statistics for this block cache.</div>
 </td>
 </tr>
 <tr id="i58" class="altColor">
 <td class="colFirst"><code>long</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#heapSize--">heapSize</a></span>()</code>
 <div class="block">Return the approximate 'exclusive deep size' of implementing object.</div>
 </td>
 </tr>
 <tr id="i59" class="rowColor">
 <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/Optional.html?is-external=true" title="class or interface in java.util">Optional</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Boolean.html?is-external=true" title="class or interface in java.lang">Boolean</a>&gt;</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#isAlreadyCached-org.apache.hadoop.hbase.io.hfile.BlockCacheKey-">isAlreadyCached</a></span>(<a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCacheKey.html" title="class in org.apache.hadoop.hbase.io.hfile">BlockCacheKey</a>&nbsp;key)</code>
 <div class="block">Checks whether the block for the passed key is already cached.</div>
 </td>
 </tr>
 <tr id="i60" class="altColor">
 <td class="colFirst"><code>(package private) boolean</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#isCacheEnabled--">isCacheEnabled</a></span>()</code>&nbsp;</td>
 </tr>
 <tr id="i61" class="rowColor">
 <td class="colFirst"><code>boolean</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#isCacheInconsistent--">isCacheInconsistent</a></span>()</code>&nbsp;</td>
 </tr>
 <tr id="i62" class="altColor">
 <td class="colFirst"><code>boolean</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#isCachePersistenceEnabled--">isCachePersistenceEnabled</a></span>()</code>&nbsp;</td>
 </tr>
 <tr id="i63" class="rowColor">
 <td class="colFirst"><code>boolean</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#isCachePersistent--">isCachePersistent</a></span>()</code>&nbsp;</td>
 </tr>
 <tr id="i64" class="altColor">
 <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/Iterator.html?is-external=true" title="class or interface in java.util">Iterator</a>&lt;<a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/CachedBlock.html" title="interface in org.apache.hadoop.hbase.io.hfile">CachedBlock</a>&gt;</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#iterator--">iterator</a></span>()</code>
 <div class="block">Returns Iterator over the blocks in the cache.</div>
 </td>
 </tr>
 <tr id="i65" class="rowColor">
 <td class="colFirst"><code>private void</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#join--">join</a></span>()</code>&nbsp;</td>
 </tr>
 <tr id="i66" class="altColor">
 <td class="colFirst"><code>void</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#logStats--">logStats</a></span>()</code>&nbsp;</td>
 </tr>
 <tr id="i67" class="rowColor">
 <td class="colFirst"><code>void</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#notifyFileCachingCompleted-org.apache.hadoop.fs.Path-int-int-long-">notifyFileCachingCompleted</a></span>(org.apache.hadoop.fs.Path&nbsp;fileName,
                           int&nbsp;totalBlockCount,
                           int&nbsp;dataBlockCount,
                           long&nbsp;size)</code>
 <div class="block">Notifies the cache implementation that the given file has been fully cached (all its blocks
  made into the cache).</div>
 </td>
 </tr>
 <tr id="i68" class="altColor">
 <td class="colFirst"><code>private void</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#parsePB-org.apache.hadoop.hbase.shaded.protobuf.generated.BucketCacheProtos.BucketCacheEntry-">parsePB</a></span>(org.apache.hadoop.hbase.shaded.protobuf.generated.BucketCacheProtos.BucketCacheEntry&nbsp;proto)</code>&nbsp;</td>
 </tr>
 <tr id="i69" class="rowColor">
 <td class="colFirst"><code>(package private) void</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#persistToFile--">persistToFile</a></span>()</code>&nbsp;</td>
 </tr>
 <tr id="i70" class="altColor">
 <td class="colFirst"><code>protected void</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#putIntoBackingMap-org.apache.hadoop.hbase.io.hfile.BlockCacheKey-org.apache.hadoop.hbase.io.hfile.bucket.BucketEntry-">putIntoBackingMap</a></span>(<a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCacheKey.html" title="class in org.apache.hadoop.hbase.io.hfile">BlockCacheKey</a>&nbsp;key,
                  <a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketEntry.html" title="class in org.apache.hadoop.hbase.io.hfile.bucket">BucketEntry</a>&nbsp;bucketEntry)</code>
 <div class="block">Put the new bucket entry into backingMap.</div>
 </td>
 </tr>
 <tr id="i71" class="rowColor">
 <td class="colFirst"><code>protected boolean</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#removeFromRamCache-org.apache.hadoop.hbase.io.hfile.BlockCacheKey-">removeFromRamCache</a></span>(<a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCacheKey.html" title="class in org.apache.hadoop.hbase.io.hfile">BlockCacheKey</a>&nbsp;cacheKey)</code>&nbsp;</td>
 </tr>
 <tr id="i72" class="altColor">
 <td class="colFirst"><code>private void</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#retrieveFromFile-int:A-">retrieveFromFile</a></span>(int[]&nbsp;bucketSizes)</code>&nbsp;</td>
 </tr>
 <tr id="i73" class="rowColor">
 <td class="colFirst"><code>private void</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#sanityCheckConfigs--">sanityCheckConfigs</a></span>()</code>&nbsp;</td>
 </tr>
 <tr id="i74" class="altColor">
 <td class="colFirst"><code>void</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#setCacheInconsistent-boolean-">setCacheInconsistent</a></span>(boolean&nbsp;setCacheInconsistent)</code>&nbsp;</td>
 </tr>
 <tr id="i75" class="rowColor">
 <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/Optional.html?is-external=true" title="class or interface in java.util">Optional</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Boolean.html?is-external=true" title="class or interface in java.lang">Boolean</a>&gt;</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#shouldCacheFile-java.lang.String-">shouldCacheFile</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;fileName)</code>
 <div class="block">Checks whether blocks for the passed file should be cached or not.</div>
 </td>
 </tr>
 <tr id="i76" class="altColor">
 <td class="colFirst"><code>protected boolean</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#shouldReplaceExistingCacheBlock-org.apache.hadoop.hbase.io.hfile.BlockCacheKey-org.apache.hadoop.hbase.io.hfile.Cacheable-">shouldReplaceExistingCacheBlock</a></span>(<a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCacheKey.html" title="class in org.apache.hadoop.hbase.io.hfile">BlockCacheKey</a>&nbsp;cacheKey,
                                <a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/Cacheable.html" title="interface in org.apache.hadoop.hbase.io.hfile">Cacheable</a>&nbsp;newBlock)</code>&nbsp;</td>
 </tr>
 <tr id="i77" class="rowColor">
 <td class="colFirst"><code>void</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#shutdown--">shutdown</a></span>()</code>
 <div class="block">Shutdown the cache.</div>
 </td>
 </tr>
 <tr id="i78" class="altColor">
 <td class="colFirst"><code>long</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#size--">size</a></span>()</code>
 <div class="block">Returns the total size of the block cache, in bytes.</div>
 </td>
 </tr>
 <tr id="i79" class="rowColor">
 <td class="colFirst"><code>(package private) void</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#startBucketCachePersisterThread--">startBucketCachePersisterThread</a></span>()</code>&nbsp;</td>
 </tr>
 <tr id="i80" class="altColor">
 <td class="colFirst"><code>protected void</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#startWriterThreads--">startWriterThreads</a></span>()</code>
 <div class="block">Called by the constructor to start the writer threads.</div>
 </td>
 </tr>
 <tr id="i81" class="rowColor">
 <td class="colFirst"><code>(package private) void</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#stopWriterThreads--">stopWriterThreads</a></span>()</code>
 <div class="block">Only used in test</div>
 </td>
 </tr>
 <tr id="i82" class="altColor">
 <td class="colFirst"><code>private void</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#updateRegionCachedSize-org.apache.hadoop.fs.Path-long-">updateRegionCachedSize</a></span>(org.apache.hadoop.fs.Path&nbsp;filePath,
                       long&nbsp;cachedSize)</code>&nbsp;</td>
 </tr>
 <tr id="i83" class="rowColor">
 <td class="colFirst"><code>private void</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#updateRegionSizeMapWhileRetrievingFromFile--">updateRegionSizeMapWhileRetrievingFromFile</a></span>()</code>&nbsp;</td>
 </tr>
 <tr id="i84" class="altColor">
 <td class="colFirst"><code>private void</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#verifyCapacityAndClasses-long-java.lang.String-java.lang.String-">verifyCapacityAndClasses</a></span>(long&nbsp;capacitySize,
                         <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;ioclass,
                         <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;mapclass)</code>&nbsp;</td>
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 <code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#clone--" title="class or interface in java.lang">clone</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#equals-java.lang.Object-" title="class or interface in java.lang">equals</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#getClass--" title="class or interface in java.lang">getClass</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#hashCode--" title="class or interface in java.lang">hashCode</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notify--" title="class or interface in java.lang">notify</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notifyAll--" title="class or interface in java.lang">notifyAll</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#toString--" title="class or interface in java.lang">toString</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait--" title="class or interface in java.lang">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-" title="class or interface in java.lang">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-int-" title="class or interface in java.lang">wait</a></code></li>
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 <code><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCache.html#getBlock-org.apache.hadoop.hbase.io.hfile.BlockCacheKey-boolean-boolean-boolean-org.apache.hadoop.hbase.io.hfile.BlockType-">getBlock</a>, <a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCache.html#isMetaBlock-org.apache.hadoop.hbase.io.hfile.BlockType-">isMetaBlock</a></code></li>
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 <code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Iterable.html?is-external=true#forEach-java.util.function.Consumer-" title="class or interface in java.lang">forEach</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Iterable.html?is-external=true#spliterator--" title="class or interface in java.lang">spliterator</a></code></li>
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 <h4>LOG</h4>
 <pre>private static final&nbsp;org.slf4j.Logger <a href="../../../../../../../src-html/org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#line.115">LOG</a></pre>
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 <pre>static final&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> <a href="../../../../../../../src-html/org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#line.118">SINGLE_FACTOR_CONFIG_NAME</a></pre>
 <div class="block">Priority buckets config</div>
 <dl>
 <dt><span class="seeLabel">See Also:</span></dt>
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 <h4>cacheBlockWithWait</h4>
 <pre>public&nbsp;void&nbsp;<a href="../../../../../../../src-html/org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#line.498">cacheBlockWithWait</a>(<a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCacheKey.html" title="class in org.apache.hadoop.hbase.io.hfile">BlockCacheKey</a>&nbsp;cacheKey,
                                <a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/Cacheable.html" title="interface in org.apache.hadoop.hbase.io.hfile">Cacheable</a>&nbsp;cachedItem,
                                boolean&nbsp;inMemory,
                                boolean&nbsp;wait)</pre>
 <div class="block">Cache the block to ramCache</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>cacheKey</code> - block's cache key</dd>
 <dd><code>cachedItem</code> - block buffer</dd>
 <dd><code>inMemory</code> - if block is in-memory</dd>
 <dd><code>wait</code> - if true, blocking wait when queue is full</dd>
 </dl>
 </li>
 </ul>
 <a name="shouldReplaceExistingCacheBlock-org.apache.hadoop.hbase.io.hfile.BlockCacheKey-org.apache.hadoop.hbase.io.hfile.Cacheable-">
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 <h4>shouldReplaceExistingCacheBlock</h4>
 <pre>protected&nbsp;boolean&nbsp;<a href="../../../../../../../src-html/org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#line.516">shouldReplaceExistingCacheBlock</a>(<a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCacheKey.html" title="class in org.apache.hadoop.hbase.io.hfile">BlockCacheKey</a>&nbsp;cacheKey,
                                                   <a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/Cacheable.html" title="interface in org.apache.hadoop.hbase.io.hfile">Cacheable</a>&nbsp;newBlock)</pre>
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 <h4>cacheBlockWithWaitInternal</h4>
 <pre>protected&nbsp;void&nbsp;<a href="../../../../../../../src-html/org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#line.520">cacheBlockWithWaitInternal</a>(<a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCacheKey.html" title="class in org.apache.hadoop.hbase.io.hfile">BlockCacheKey</a>&nbsp;cacheKey,
                                           <a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/Cacheable.html" title="interface in org.apache.hadoop.hbase.io.hfile">Cacheable</a>&nbsp;cachedItem,
                                           boolean&nbsp;inMemory,
                                           boolean&nbsp;wait)</pre>
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 <a name="getBlock-org.apache.hadoop.hbase.io.hfile.BlockCacheKey-boolean-boolean-boolean-">
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 <h4>getBlock</h4>
 <pre>public&nbsp;<a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/Cacheable.html" title="interface in org.apache.hadoop.hbase.io.hfile">Cacheable</a>&nbsp;<a href="../../../../../../../src-html/org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#line.572">getBlock</a>(<a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCacheKey.html" title="class in org.apache.hadoop.hbase.io.hfile">BlockCacheKey</a>&nbsp;key,
                           boolean&nbsp;caching,
                           boolean&nbsp;repeat,
                           boolean&nbsp;updateCacheMetrics)</pre>
 <div class="block">Get the buffer of the block with the specified key.</div>
 <dl>
 <dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
 <dd><code><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCache.html#getBlock-org.apache.hadoop.hbase.io.hfile.BlockCacheKey-boolean-boolean-boolean-">getBlock</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCache.html" title="interface in org.apache.hadoop.hbase.io.hfile">BlockCache</a></code></dd>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>key</code> - block's cache key</dd>
 <dd><code>caching</code> - true if the caller caches blocks on cache misses</dd>
 <dd><code>repeat</code> - Whether this is a repeat lookup for the same block</dd>
 <dd><code>updateCacheMetrics</code> - Whether we should update cache metrics or not</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>buffer of specified cache key, or null if not in cache</dd>
 </dl>
 </li>
 </ul>
 <a name="blockEvicted-org.apache.hadoop.hbase.io.hfile.BlockCacheKey-org.apache.hadoop.hbase.io.hfile.bucket.BucketEntry-boolean-boolean-">
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 <h4>blockEvicted</h4>
 <pre>void&nbsp;<a href="../../../../../../../src-html/org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#line.638">blockEvicted</a>(<a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCacheKey.html" title="class in org.apache.hadoop.hbase.io.hfile">BlockCacheKey</a>&nbsp;cacheKey,
                   <a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketEntry.html" title="class in org.apache.hadoop.hbase.io.hfile.bucket">BucketEntry</a>&nbsp;bucketEntry,
                   boolean&nbsp;decrementBlockNumber,
                   boolean&nbsp;evictedByEvictionProcess)</pre>
 <div class="block">This method is invoked after the bucketEntry is removed from <a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#backingMap"><code>backingMap</code></a></div>
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 </a>
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 <h4>fileNotFullyCached</h4>
 <pre>private&nbsp;void&nbsp;<a href="../../../../../../../src-html/org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#line.656">fileNotFullyCached</a>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;hfileName)</pre>
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 <ul class="blockList">
 <li class="blockList">
 <h4>fileCacheCompleted</h4>
 <pre>public&nbsp;void&nbsp;<a href="../../../../../../../src-html/org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#line.675">fileCacheCompleted</a>(org.apache.hadoop.fs.Path&nbsp;filePath,
                                long&nbsp;size)</pre>
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 <h4>updateRegionCachedSize</h4>
 <pre>private&nbsp;void&nbsp;<a href="../../../../../../../src-html/org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#line.684">updateRegionCachedSize</a>(org.apache.hadoop.fs.Path&nbsp;filePath,
                                     long&nbsp;cachedSize)</pre>
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 <a name="freeBucketEntry-org.apache.hadoop.hbase.io.hfile.bucket.BucketEntry-">
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 <h4>freeBucketEntry</h4>
 <pre>void&nbsp;<a href="../../../../../../../src-html/org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#line.696">freeBucketEntry</a>(<a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketEntry.html" title="class in org.apache.hadoop.hbase.io.hfile.bucket">BucketEntry</a>&nbsp;bucketEntry)</pre>
 <div class="block">Free the {<a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketEntry.html" title="class in org.apache.hadoop.hbase.io.hfile.bucket"><code>BucketEntry</code></a> actually,which could only be invoked when the
  <a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketEntry.html#refCnt"><code>BucketEntry.refCnt</code></a> becoming 0.</div>
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 <a name="evictBlock-org.apache.hadoop.hbase.io.hfile.BlockCacheKey-">
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 <h4>evictBlock</h4>
 <pre>public&nbsp;boolean&nbsp;<a href="../../../../../../../src-html/org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#line.718">evictBlock</a>(<a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCacheKey.html" title="class in org.apache.hadoop.hbase.io.hfile">BlockCacheKey</a>&nbsp;cacheKey)</pre>
 <div class="block">Try to evict the block from <a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCache.html" title="interface in org.apache.hadoop.hbase.io.hfile"><code>BlockCache</code></a> by force. We'll call this in few cases:<br>
  1. Close an HFile, and clear all cached blocks. <br>
  2. Call <a href="../../../../../../../org/apache/hadoop/hbase/client/Admin.html#clearBlockCache-org.apache.hadoop.hbase.TableName-"><code>Admin.clearBlockCache(TableName)</code></a> to clear all blocks for a given table.<br>
  <p>
  Firstly, we'll try to remove the block from RAMCache,and then try to evict from backingMap.
  Here we evict the block from backingMap immediately, but only free the reference from bucket
  cache by calling <a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketEntry.html#markedAsEvicted"><code>BucketEntry.markedAsEvicted</code></a>. If there're still some RPC referring this
  block, block can only be de-allocated when all of them release the block.
  <p>
  NOTICE: we need to grab the write offset lock firstly before releasing the reference from
  bucket cache. if we don't, we may read an <a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketEntry.html" title="class in org.apache.hadoop.hbase.io.hfile.bucket"><code>BucketEntry</code></a> with refCnt = 0 when
  <a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#getBlock-org.apache.hadoop.hbase.io.hfile.BlockCacheKey-boolean-boolean-boolean-"><code>getBlock(BlockCacheKey, boolean, boolean, boolean)</code></a>, it's a memory leak.</div>
 <dl>
 <dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
 <dd><code><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCache.html#evictBlock-org.apache.hadoop.hbase.io.hfile.BlockCacheKey-">evictBlock</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCache.html" title="interface in org.apache.hadoop.hbase.io.hfile">BlockCache</a></code></dd>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>cacheKey</code> - Block to evict</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>true to indicate whether we've evicted successfully or not.</dd>
 </dl>
 </li>
 </ul>
 <a name="doEvictBlock-org.apache.hadoop.hbase.io.hfile.BlockCacheKey-org.apache.hadoop.hbase.io.hfile.bucket.BucketEntry-boolean-">
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 <li class="blockList">
 <h4>doEvictBlock</h4>
 <pre>private&nbsp;boolean&nbsp;<a href="../../../../../../../src-html/org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#line.731">doEvictBlock</a>(<a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCacheKey.html" title="class in org.apache.hadoop.hbase.io.hfile">BlockCacheKey</a>&nbsp;cacheKey,
                              <a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketEntry.html" title="class in org.apache.hadoop.hbase.io.hfile.bucket">BucketEntry</a>&nbsp;bucketEntry,
                              boolean&nbsp;evictedByEvictionProcess)</pre>
 <div class="block">Evict the <a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCacheKey.html" title="class in org.apache.hadoop.hbase.io.hfile"><code>BlockCacheKey</code></a> and <a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketEntry.html" title="class in org.apache.hadoop.hbase.io.hfile.bucket"><code>BucketEntry</code></a> from <a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#backingMap"><code>backingMap</code></a> and
  <a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#ramCache"><code>ramCache</code></a>. <br/>
  NOTE:When Evict from <a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#backingMap"><code>backingMap</code></a>,only the matched <a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCacheKey.html" title="class in org.apache.hadoop.hbase.io.hfile"><code>BlockCacheKey</code></a> and
  <a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketEntry.html" title="class in org.apache.hadoop.hbase.io.hfile.bucket"><code>BucketEntry</code></a> could be removed.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>cacheKey</code> - <a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCacheKey.html" title="class in org.apache.hadoop.hbase.io.hfile"><code>BlockCacheKey</code></a> to evict.</dd>
 <dd><code>bucketEntry</code> - <a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketEntry.html" title="class in org.apache.hadoop.hbase.io.hfile.bucket"><code>BucketEntry</code></a> matched <a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCacheKey.html" title="class in org.apache.hadoop.hbase.io.hfile"><code>BlockCacheKey</code></a> to evict.</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>true to indicate whether we've evicted successfully or not.</dd>
 </dl>
 </li>
 </ul>
 <a name="createRecycler-org.apache.hadoop.hbase.io.hfile.bucket.BucketEntry-">
 <!--   -->
 </a>
 <ul class="blockList">
 <li class="blockList">
 <h4>createRecycler</h4>
 <pre>private&nbsp;<a href="../../../../../../../org/apache/hadoop/hbase/io/ByteBuffAllocator.Recycler.html" title="interface in org.apache.hadoop.hbase.io">ByteBuffAllocator.Recycler</a>&nbsp;<a href="../../../../../../../src-html/org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#line.773">createRecycler</a>(<a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketEntry.html" title="class in org.apache.hadoop.hbase.io.hfile.bucket">BucketEntry</a>&nbsp;bucketEntry)</pre>
 <div class="block"><pre>
  Create the <a href="../../../../../../../org/apache/hadoop/hbase/io/ByteBuffAllocator.Recycler.html" title="interface in org.apache.hadoop.hbase.io"><code>ByteBuffAllocator.Recycler</code></a> for <a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketEntry.html#refCnt"><code>BucketEntry.refCnt</code></a>,which would be used as
  <a href="../../../../../../../org/apache/hadoop/hbase/nio/RefCnt.html#recycler"><code>RefCnt.recycler</code></a> of <code>HFileBlock#buf</code> returned from <a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#getBlock-org.apache.hadoop.hbase.io.hfile.BlockCacheKey-boolean-boolean-boolean-"><code>getBlock(org.apache.hadoop.hbase.io.hfile.BlockCacheKey, boolean, boolean, boolean)</code></a>.
  NOTE: for <a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#getBlock-org.apache.hadoop.hbase.io.hfile.BlockCacheKey-boolean-boolean-boolean-"><code>getBlock(org.apache.hadoop.hbase.io.hfile.BlockCacheKey, boolean, boolean, boolean)</code></a>,the <a href="../../../../../../../org/apache/hadoop/hbase/nio/RefCnt.html#recycler"><code>RefCnt.recycler</code></a> of <code>HFileBlock#buf</code>
  from <a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#backingMap"><code>backingMap</code></a> and <a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#ramCache"><code>ramCache</code></a> are different:
  1.For <a href="../../../../../../../org/apache/hadoop/hbase/nio/RefCnt.html#recycler"><code>RefCnt.recycler</code></a> of <code>HFileBlock#buf</code> from <a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#backingMap"><code>backingMap</code></a>,
    it is the return value of current <a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#createRecycler-org.apache.hadoop.hbase.io.hfile.bucket.BucketEntry-"><code>createRecycler(org.apache.hadoop.hbase.io.hfile.bucket.BucketEntry)</code></a> method.

  2.For <a href="../../../../../../../org/apache/hadoop/hbase/nio/RefCnt.html#recycler"><code>RefCnt.recycler</code></a> of <code>HFileBlock#buf</code> from <a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#ramCache"><code>ramCache</code></a>,
    it is <a href="../../../../../../../org/apache/hadoop/hbase/io/ByteBuffAllocator.html#putbackBuffer-java.nio.ByteBuffer-"><code>ByteBuffAllocator.putbackBuffer(java.nio.ByteBuffer)</code></a>.
  </pre></div>
 </li>
 </ul>
 <a name="evictBlockIfNoRpcReferenced-org.apache.hadoop.hbase.io.hfile.BlockCacheKey-">
 <!--   -->
 </a>
 <ul class="blockList">
 <li class="blockList">
 <h4>evictBlockIfNoRpcReferenced</h4>
 <pre>public&nbsp;boolean&nbsp;<a href="../../../../../../../src-html/org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#line.783">evictBlockIfNoRpcReferenced</a>(<a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCacheKey.html" title="class in org.apache.hadoop.hbase.io.hfile">BlockCacheKey</a>&nbsp;blockCacheKey)</pre>
 <div class="block">NOTE: This method is only for test.</div>
 </li>
 </ul>
 <a name="evictBucketEntryIfNoRpcReferenced-org.apache.hadoop.hbase.io.hfile.BlockCacheKey-org.apache.hadoop.hbase.io.hfile.bucket.BucketEntry-">
 <!--   -->
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 <ul class="blockList">
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 <h4>evictBucketEntryIfNoRpcReferenced</h4>
 <pre>boolean&nbsp;<a href="../../../../../../../src-html/org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#line.800">evictBucketEntryIfNoRpcReferenced</a>(<a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCacheKey.html" title="class in org.apache.hadoop.hbase.io.hfile">BlockCacheKey</a>&nbsp;blockCacheKey,
                                           <a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketEntry.html" title="class in org.apache.hadoop.hbase.io.hfile.bucket">BucketEntry</a>&nbsp;bucketEntry)</pre>
 <div class="block">Evict <a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCacheKey.html" title="class in org.apache.hadoop.hbase.io.hfile"><code>BlockCacheKey</code></a> and its corresponding <a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketEntry.html" title="class in org.apache.hadoop.hbase.io.hfile.bucket"><code>BucketEntry</code></a> only if
  <a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketEntry.html#isRpcRef--"><code>BucketEntry.isRpcRef()</code></a> is false. <br/>
  NOTE:When evict from <a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#backingMap"><code>backingMap</code></a>,only the matched <a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCacheKey.html" title="class in org.apache.hadoop.hbase.io.hfile"><code>BlockCacheKey</code></a> and
  <a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketEntry.html" title="class in org.apache.hadoop.hbase.io.hfile.bucket"><code>BucketEntry</code></a> could be removed.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>blockCacheKey</code> - <a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCacheKey.html" title="class in org.apache.hadoop.hbase.io.hfile"><code>BlockCacheKey</code></a> to evict.</dd>
 <dd><code>bucketEntry</code> - <a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketEntry.html" title="class in org.apache.hadoop.hbase.io.hfile.bucket"><code>BucketEntry</code></a> matched <a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCacheKey.html" title="class in org.apache.hadoop.hbase.io.hfile"><code>BlockCacheKey</code></a> to evict.</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>true to indicate whether we've evicted successfully or not.</dd>
 </dl>
 </li>
 </ul>
 <a name="removeFromRamCache-org.apache.hadoop.hbase.io.hfile.BlockCacheKey-">
 <!--   -->
 </a>
 <ul class="blockList">
 <li class="blockList">
 <h4>removeFromRamCache</h4>
 <pre>protected&nbsp;boolean&nbsp;<a href="../../../../../../../src-html/org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#line.807">removeFromRamCache</a>(<a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCacheKey.html" title="class in org.apache.hadoop.hbase.io.hfile">BlockCacheKey</a>&nbsp;cacheKey)</pre>
 </li>
 </ul>
 <a name="isCacheInconsistent--">
 <!--   -->
 </a>
 <ul class="blockList">
 <li class="blockList">
 <h4>isCacheInconsistent</h4>
 <pre>public&nbsp;boolean&nbsp;<a href="../../../../../../../src-html/org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#line.816">isCacheInconsistent</a>()</pre>
 </li>
 </ul>
 <a name="setCacheInconsistent-boolean-">
 <!--   -->
 </a>
 <ul class="blockList">
 <li class="blockList">
 <h4>setCacheInconsistent</h4>
 <pre>public&nbsp;void&nbsp;<a href="../../../../../../../src-html/org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#line.820">setCacheInconsistent</a>(boolean&nbsp;setCacheInconsistent)</pre>
 </li>
 </ul>
 <a name="logStats--">
 <!--   -->
 </a>
 <ul class="blockList">
 <li class="blockList">
 <h4>logStats</h4>
 <pre>public&nbsp;void&nbsp;<a href="../../../../../../../src-html/org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#line.842">logStats</a>()</pre>
 </li>
 </ul>
 <a name="getRealCacheSize--">
 <!--   -->
 </a>
 <ul class="blockList">
 <li class="blockList">
 <h4>getRealCacheSize</h4>
 <pre>public&nbsp;long&nbsp;<a href="../../../../../../../src-html/org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#line.870">getRealCacheSize</a>()</pre>
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 <h4>acceptableSize</h4>
 <pre>public&nbsp;long&nbsp;<a href="../../../../../../../src-html/org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#line.874">acceptableSize</a>()</pre>
 </li>
 </ul>
 <a name="getPartitionSize-float-">
 <!--   -->
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 <h4>getPartitionSize</h4>
 <pre>long&nbsp;<a href="../../../../../../../src-html/org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#line.878">getPartitionSize</a>(float&nbsp;partitionFactor)</pre>
 </li>
 </ul>
 <a name="bucketSizesAboveThresholdCount-float-">
 <!--   -->
 </a>
 <ul class="blockList">
 <li class="blockList">
 <h4>bucketSizesAboveThresholdCount</h4>
 <pre>private&nbsp;int&nbsp;<a href="../../../../../../../src-html/org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#line.885">bucketSizesAboveThresholdCount</a>(float&nbsp;minFactor)</pre>
 <div class="block">Return the count of bucketSizeinfos still need free space</div>
 </li>
 </ul>
 <a name="freeEntireBuckets-int-">
 <!--   -->
 </a>
 <ul class="blockList">
 <li class="blockList">
 <h4>freeEntireBuckets</h4>
 <pre>private&nbsp;void&nbsp;<a href="../../../../../../../src-html/org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#line.905">freeEntireBuckets</a>(int&nbsp;completelyFreeBucketsNeeded)</pre>
 <div class="block">This method will find the buckets that are minimally occupied and are not reference counted and
  will free them completely without any constraint on the access times of the elements, and as a
  process will completely free at most the number of buckets passed, sometimes it might not due
  to changing refCounts</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>completelyFreeBucketsNeeded</code> - number of buckets to free</dd>
 </dl>
 </li>
 </ul>
 <a name="freeSpace-java.lang.String-">
 <!--   -->
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 <h4>freeSpace</h4>
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 <div class="block">Free the space if the used size reaches acceptableSize() or one size block couldn't be
  allocated. When freeing the space, we use the LRU algorithm and ensure there must be some
  blocks evicted</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>why</code> - Why we are being called</dd>
 </dl>
 </li>
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 <pre>protected&nbsp;void&nbsp;<a href="../../../../../../../src-html/org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#line.1121">putIntoBackingMap</a>(<a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCacheKey.html" title="class in org.apache.hadoop.hbase.io.hfile">BlockCacheKey</a>&nbsp;key,
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 <div class="block">Put the new bucket entry into backingMap. Notice that we are allowed to replace the existing
  cache with a new block for the same cache key. there's a corner case: one thread cache a block
  in ramCache, copy to io-engine and add a bucket entry to backingMap. Caching another new block
  with the same cache key do the same thing for the same cache key, so if not evict the previous
  bucket entry, then memory leak happen because the previous bucketEntry is gone but the
  bucketAllocator do not free its memory.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>key</code> - Block cache key</dd>
 <dd><code>bucketEntry</code> - Bucket entry to put into backingMap.</dd>
 <dt><span class="seeLabel">See Also:</span></dt>
 <dd><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCacheUtil.html#shouldReplaceExistingCacheBlock-org.apache.hadoop.hbase.io.hfile.BlockCache-org.apache.hadoop.hbase.io.hfile.BlockCacheKey-org.apache.hadoop.hbase.io.hfile.Cacheable-"><code>BlockCacheUtil.shouldReplaceExistingCacheBlock(BlockCache blockCache,BlockCacheKey
       cacheKey, Cacheable newBlock)</code></a></dd>
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 <a name="getAllocationFailWarningMessage-org.apache.hadoop.hbase.io.hfile.bucket.BucketAllocatorException-org.apache.hadoop.hbase.io.hfile.bucket.BucketCache.RAMQueueEntry-">
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 <div class="block">Prepare and return a warning message for Bucket Allocator Exception</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>fle</code> - The exception</dd>
 <dd><code>re</code> - The RAMQueueEntry for which the exception was thrown.</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>A warning message created from the input RAMQueueEntry object.</dd>
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 <div class="block">Flush the entries in ramCache to IOEngine and add bucket entry to backingMap. Process all that
  are passed in even if failure being sure to remove from ramCache else we'll never undo the
  references and we'll OOME.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>entries</code> - Presumes list passed in here will be processed by this invocation only. No
                 interference expected.</dd>
 <dt><span class="throwsLabel">Throws:</span></dt>
 <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/InterruptedException.html?is-external=true" title="class or interface in java.lang">InterruptedException</a></code></dd>
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 <div class="block">Blocks until elements available in <code>q</code> then tries to grab as many as possible before
  returning.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>receptacle</code> - Where to stash the elements taken from queue. We clear before we use it just
                    in case.</dd>
 <dd><code>q</code> - The queue to take from.</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd><code>receptacle</code> laden with elements taken from the queue or empty if none found.</dd>
 <dt><span class="throwsLabel">Throws:</span></dt>
 <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/InterruptedException.html?is-external=true" title="class or interface in java.lang">InterruptedException</a></code></dd>
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 <dl>
 <dt><span class="throwsLabel">Throws:</span></dt>
 <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code></dd>
 <dt><span class="seeLabel">See Also:</span></dt>
 <dd><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#retrieveFromFile-int:A-"><code>retrieveFromFile(int[])</code></a></dd>
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 <pre>public&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Optional.html?is-external=true" title="class or interface in java.util">Optional</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>,<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Long.html?is-external=true" title="class or interface in java.lang">Long</a>&gt;&gt;&nbsp;<a href="../../../../../../../src-html/org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#line.1347">getRegionCachedInfo</a>()</pre>
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 <div class="block">Returns an Optional containing a map of regions and the percentage of how much of it has been
  cached so far.</div>
 <dl>
 <dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
 <dd><code><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCache.html#getRegionCachedInfo--">getRegionCachedInfo</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCache.html" title="interface in org.apache.hadoop.hbase.io.hfile">BlockCache</a></code></dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>empty optional if this method is not supported, otherwise the returned optional
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 <dl>
 <dt><span class="throwsLabel">Throws:</span></dt>
 <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code></dd>
 <dt><span class="seeLabel">See Also:</span></dt>
 <dd><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#persistToFile--"><code>persistToFile()</code></a></dd>
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 <pre>private&nbsp;void&nbsp;<a href="../../../../../../../src-html/org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#line.1388">updateRegionSizeMapWhileRetrievingFromFile</a>()</pre>
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 <h4>dumpPrefetchList</h4>
 <pre>private&nbsp;void&nbsp;<a href="../../../../../../../src-html/org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#line.1404">dumpPrefetchList</a>()</pre>
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 <h4>deleteFileOnClose</h4>
 <pre>private&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/io/FileInputStream.html?is-external=true" title="class or interface in java.io">FileInputStream</a>&nbsp;<a href="../../../../../../../src-html/org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#line.1428">deleteFileOnClose</a>(<a href="https://docs.oracle.com/javase/8/docs/api/java/io/File.html?is-external=true" title="class or interface in java.io">File</a>&nbsp;file)
                                    throws <a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre>
 <div class="block">Create an input stream that deletes the file after reading it. Use in try-with-resources to
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  <pre>
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 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>file</code> - the file to read and delete</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>a FileInputStream for the given file</dd>
 <dt><span class="throwsLabel">Throws:</span></dt>
 <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code> - if there is a problem creating the stream</dd>
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 <pre>private&nbsp;void&nbsp;<a href="../../../../../../../src-html/org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#line.1455">verifyCapacityAndClasses</a>(long&nbsp;capacitySize,
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 <dl>
 <dt><span class="throwsLabel">Throws:</span></dt>
 <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code></dd>
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 <dl>
 <dt><span class="throwsLabel">Throws:</span></dt>
 <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code></dd>
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 <div class="block">Check whether we tolerate IO error this time. If the duration of IOEngine throwing errors
  exceeds ioErrorsDurationTimeTolerated, we will disable the cache</div>
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 <h4>join</h4>
 <pre>private&nbsp;void&nbsp;<a href="../../../../../../../src-html/org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#line.1565">join</a>()
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 <dt><span class="throwsLabel">Throws:</span></dt>
 <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/InterruptedException.html?is-external=true" title="class or interface in java.lang">InterruptedException</a></code></dd>
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 <dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
 <dd><code><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCache.html#shutdown--">shutdown</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCache.html" title="interface in org.apache.hadoop.hbase.io.hfile">BlockCache</a></code></dd>
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 <dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
 <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#finalize--" title="class or interface in java.lang">finalize</a></code>&nbsp;in class&nbsp;<code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></code></dd>
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 <div class="block"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCache.html#getStats--">BlockCache</a></code></span></div>
 <div class="block">Get the statistics for this block cache.</div>
 <dl>
 <dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
 <dd><code><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCache.html#getStats--">getStats</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCache.html" title="interface in org.apache.hadoop.hbase.io.hfile">BlockCache</a></code></dd>
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 <pre>public&nbsp;<a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketAllocator.html" title="class in org.apache.hadoop.hbase.io.hfile.bucket">BucketAllocator</a>&nbsp;<a href="../../../../../../../src-html/org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#line.1610">getAllocator</a>()</pre>
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 <div class="block">Return the approximate 'exclusive deep size' of implementing object. Includes count of payload
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 <dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
 <dd><code><a href="../../../../../../../org/apache/hadoop/hbase/io/HeapSize.html#heapSize--">heapSize</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../../../org/apache/hadoop/hbase/io/HeapSize.html" title="interface in org.apache.hadoop.hbase.io">HeapSize</a></code></dd>
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 <div class="block"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCache.html#size--">BlockCache</a></code></span></div>
 <div class="block">Returns the total size of the block cache, in bytes.</div>
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 <dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
 <dd><code><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCache.html#size--">size</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCache.html" title="interface in org.apache.hadoop.hbase.io.hfile">BlockCache</a></code></dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>size of cache, in bytes</dd>
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 <dl>
 <dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
 <dd><code><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCache.html#getCurrentDataSize--">getCurrentDataSize</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCache.html" title="interface in org.apache.hadoop.hbase.io.hfile">BlockCache</a></code></dd>
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 <div class="block"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCache.html#getFreeSize--">BlockCache</a></code></span></div>
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 <dl>
 <dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
 <dd><code><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCache.html#getFreeSize--">getFreeSize</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCache.html" title="interface in org.apache.hadoop.hbase.io.hfile">BlockCache</a></code></dd>
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 <dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
 <dd><code><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCache.html#getBlockCount--">getBlockCount</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCache.html" title="interface in org.apache.hadoop.hbase.io.hfile">BlockCache</a></code></dd>
 <dt><span class="returnLabel">Returns:</span></dt>
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 <div class="block"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCache.html#getDataBlockCount--">BlockCache</a></code></span></div>
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 <dl>
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 <dd><code><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCache.html#getDataBlockCount--">getDataBlockCount</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCache.html" title="interface in org.apache.hadoop.hbase.io.hfile">BlockCache</a></code></dd>
 <dt><span class="returnLabel">Returns:</span></dt>
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 <a name="getCurrentSize--">
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 <pre>public&nbsp;long&nbsp;<a href="../../../../../../../src-html/org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#line.1645">getCurrentSize</a>()</pre>
 <div class="block"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCache.html#getCurrentSize--">BlockCache</a></code></span></div>
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 <dl>
 <dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
 <dd><code><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCache.html#getCurrentSize--">getCurrentSize</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCache.html" title="interface in org.apache.hadoop.hbase.io.hfile">BlockCache</a></code></dd>
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 <h4>getAlgorithm</h4>
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 <h4>evictBlocksByHfileName</h4>
 <pre>public&nbsp;int&nbsp;<a href="../../../../../../../src-html/org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#line.1660">evictBlocksByHfileName</a>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;hfileName)</pre>
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 <dd><code><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCache.html#evictBlocksByHfileName-java.lang.String-">evictBlocksByHfileName</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCache.html" title="interface in org.apache.hadoop.hbase.io.hfile">BlockCache</a></code></dd>
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 <div class="block">Only used in test</div>
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 <div class="block"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCache.html#iterator--">BlockCache</a></code></span></div>
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 <dl>
 <dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
 <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Iterable.html?is-external=true#iterator--" title="class or interface in java.lang">iterator</a></code>&nbsp;in interface&nbsp;<code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Iterable.html?is-external=true" title="class or interface in java.lang">Iterable</a>&lt;<a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/CachedBlock.html" title="interface in org.apache.hadoop.hbase.io.hfile">CachedBlock</a>&gt;</code></dd>
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 <dd><code><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCache.html#iterator--">iterator</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCache.html" title="interface in org.apache.hadoop.hbase.io.hfile">BlockCache</a></code></dd>
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 <div class="block"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCache.html#getBlockCaches--">BlockCache</a></code></span></div>
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 <dl>
 <dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
 <dd><code><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCache.html#getBlockCaches--">getBlockCaches</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCache.html" title="interface in org.apache.hadoop.hbase.io.hfile">BlockCache</a></code></dd>
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 <h4>getAcceptableFactor</h4>
 <pre>float&nbsp;<a href="../../../../../../../src-html/org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#line.1933">getAcceptableFactor</a>()</pre>
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 <h4>getMinFactor</h4>
 <pre>float&nbsp;<a href="../../../../../../../src-html/org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#line.1937">getMinFactor</a>()</pre>
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 <pre>float&nbsp;<a href="../../../../../../../src-html/org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#line.1941">getExtraFreeFactor</a>()</pre>
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 <h4>getSingleFactor</h4>
 <pre>float&nbsp;<a href="../../../../../../../src-html/org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#line.1945">getSingleFactor</a>()</pre>
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 <pre>float&nbsp;<a href="../../../../../../../src-html/org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#line.1949">getMultiFactor</a>()</pre>
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 <pre>float&nbsp;<a href="../../../../../../../src-html/org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#line.1953">getMemoryFactor</a>()</pre>
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 <div class="block"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCache.html#getFullyCachedFiles--">BlockCache</a></code></span></div>
 <div class="block">Returns an Optional containing the map of files that have been fully cached (all its blocks are
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 <dd><code><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCache.html#getFullyCachedFiles--">getFullyCachedFiles</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCache.html" title="interface in org.apache.hadoop.hbase.io.hfile">BlockCache</a></code></dd>
 <dt><span class="returnLabel">Returns:</span></dt>
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 <div class="block"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCache.html#notifyFileCachingCompleted-org.apache.hadoop.fs.Path-int-int-long-">BlockCache</a></code></span></div>
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 <dl>
 <dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
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 <dt><span class="paramLabel">Parameters:</span></dt>
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 <dd><code>dataBlockCount</code> - number of DATA block type cached.</dd>
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 <div class="block"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCache.html#blockFitsIntoTheCache-org.apache.hadoop.hbase.io.hfile.HFileBlock-">BlockCache</a></code></span></div>
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 <div class="block">Checks whether blocks for the passed file should be cached or not. This method may not be
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 <dd><code><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCache.html#shouldCacheFile-java.lang.String-">shouldCacheFile</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCache.html" title="interface in org.apache.hadoop.hbase.io.hfile">BlockCache</a></code></dd>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>fileName</code> - to check if it should be cached.</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>empty optional if this method is not supported, otherwise the returned optional
          contains the boolean value informing if the file should be cached.</dd>
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 <h4>isAlreadyCached</h4>
 <pre>public&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Optional.html?is-external=true" title="class or interface in java.util">Optional</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Boolean.html?is-external=true" title="class or interface in java.lang">Boolean</a>&gt;&nbsp;<a href="../../../../../../../src-html/org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#line.2159">isAlreadyCached</a>(<a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCacheKey.html" title="class in org.apache.hadoop.hbase.io.hfile">BlockCacheKey</a>&nbsp;key)</pre>
 <div class="block"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCache.html#isAlreadyCached-org.apache.hadoop.hbase.io.hfile.BlockCacheKey-">BlockCache</a></code></span></div>
 <div class="block">Checks whether the block for the passed key is already cached. This method may not be
  overridden by all implementing classes. In such cases, the returned Optional will be empty. For
  subclasses implementing this logic, the returned Optional would contain the boolean value
  reflecting if the block for the passed key is already cached or not.</div>
 <dl>
 <dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
 <dd><code><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCache.html#isAlreadyCached-org.apache.hadoop.hbase.io.hfile.BlockCacheKey-">isAlreadyCached</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCache.html" title="interface in org.apache.hadoop.hbase.io.hfile">BlockCache</a></code></dd>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>key</code> - for the block we want to check if it's already in the cache.</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>empty optional if this method is not supported, otherwise the returned optional
          contains the boolean value informing if the block is already cached.</dd>
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 <h4>getBlockSize</h4>
 <pre>public&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Optional.html?is-external=true" title="class or interface in java.util">Optional</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Integer.html?is-external=true" title="class or interface in java.lang">Integer</a>&gt;&nbsp;<a href="../../../../../../../src-html/org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#line.2164">getBlockSize</a>(<a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCacheKey.html" title="class in org.apache.hadoop.hbase.io.hfile">BlockCacheKey</a>&nbsp;key)</pre>
 <div class="block"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCache.html#getBlockSize-org.apache.hadoop.hbase.io.hfile.BlockCacheKey-">BlockCache</a></code></span></div>
 <div class="block">Returns an Optional containing the size of the block related to the passed key. If the block is
  not in the cache, returned optional will be empty. Also, this method may not be overridden by
  all implementing classes. In such cases, the returned Optional will be empty.</div>
 <dl>
 <dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
 <dd><code><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCache.html#getBlockSize-org.apache.hadoop.hbase.io.hfile.BlockCacheKey-">getBlockSize</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCache.html" title="interface in org.apache.hadoop.hbase.io.hfile">BlockCache</a></code></dd>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>key</code> - for the block we want to check if it's already in the cache.</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>empty optional if this method is not supported, otherwise the returned optional
          contains the boolean value informing if the block is already cached.</dd>
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