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| <div class="subTitle">org.apache.hadoop.hbase.io.hfile</div> |
| <h2 title="Class MemcachedBlockCache" class="title">Class MemcachedBlockCache</h2> |
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| <li>org.apache.hadoop.hbase.io.hfile.MemcachedBlockCache</li> |
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| <pre>@InterfaceAudience.Private |
| public class <a href="../../../../../../src-html/org/apache/hadoop/hbase/io/hfile/MemcachedBlockCache.html#line.55">MemcachedBlockCache</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></pre> |
| <div class="block">Class to store blocks into memcached. |
| This should only be used on a cluster of Memcached daemons that are tuned well and have a |
| good network connection to the HBase regionservers. Any other use will likely slow down HBase |
| greatly.</div> |
| </li> |
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| <td class="colFirst"><code>private static class </code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/io/hfile/MemcachedBlockCache.HFileBlockTranscoder.html" title="class in org.apache.hadoop.hbase.io.hfile">MemcachedBlockCache.HFileBlockTranscoder</a></span></code> |
| <div class="block">Class to encode and decode an HFileBlock to and from memecached's resulting byte arrays.</div> |
| </td> |
| </tr> |
| </table> |
| </li> |
| </ul> |
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| <caption><span>Fields</span><span class="tabEnd"> </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>private <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/MemcachedBlockCache.html#cacheStats">cacheStats</a></span></code> </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>private net.spy.memcached.MemcachedClient</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/io/hfile/MemcachedBlockCache.html#client">client</a></span></code> </td> |
| </tr> |
| <tr class="altColor"> |
| <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/MemcachedBlockCache.html#LOG">LOG</a></span></code> </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/MemcachedBlockCache.html#MAX_SIZE">MAX_SIZE</a></span></code> </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>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/MemcachedBlockCache.html#MEMCACHED_CONFIG_KEY">MEMCACHED_CONFIG_KEY</a></span></code> </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>static long</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/io/hfile/MemcachedBlockCache.html#MEMCACHED_DEFAULT_TIMEOUT">MEMCACHED_DEFAULT_TIMEOUT</a></span></code> </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>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/MemcachedBlockCache.html#MEMCACHED_OPTIMEOUT_KEY">MEMCACHED_OPTIMEOUT_KEY</a></span></code> </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>static boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/io/hfile/MemcachedBlockCache.html#MEMCACHED_OPTIMIZE_DEFAULT">MEMCACHED_OPTIMIZE_DEFAULT</a></span></code> </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>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/MemcachedBlockCache.html#MEMCACHED_OPTIMIZE_KEY">MEMCACHED_OPTIMIZE_KEY</a></span></code> </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>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/MemcachedBlockCache.html#MEMCACHED_TIMEOUT_KEY">MEMCACHED_TIMEOUT_KEY</a></span></code> </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>private <a href="../../../../../../org/apache/hadoop/hbase/io/hfile/MemcachedBlockCache.HFileBlockTranscoder.html" title="class in org.apache.hadoop.hbase.io.hfile">MemcachedBlockCache.HFileBlockTranscoder</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/io/hfile/MemcachedBlockCache.html#tc">tc</a></span></code> </td> |
| </tr> |
| </table> |
| </li> |
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| <caption><span>Constructors</span><span class="tabEnd"> </span></caption> |
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| <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/MemcachedBlockCache.html#MemcachedBlockCache-org.apache.hadoop.conf.Configuration-">MemcachedBlockCache</a></span>(org.apache.hadoop.conf.Configuration c)</code> </td> |
| </tr> |
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| <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"> </span></span><span id="t2" class="tableTab"><span><a href="javascript:show(2);">Instance Methods</a></span><span class="tabEnd"> </span></span><span id="t4" class="tableTab"><span><a href="javascript:show(8);">Concrete Methods</a></span><span class="tabEnd"> </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>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/io/hfile/MemcachedBlockCache.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> cacheKey, |
| <a href="../../../../../../org/apache/hadoop/hbase/io/hfile/Cacheable.html" title="interface in org.apache.hadoop.hbase.io.hfile">Cacheable</a> buf)</code> |
| <div class="block">Add block to cache (defaults to not in-memory).</div> |
| </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/io/hfile/MemcachedBlockCache.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> cacheKey, |
| <a href="../../../../../../org/apache/hadoop/hbase/io/hfile/Cacheable.html" title="interface in org.apache.hadoop.hbase.io.hfile">Cacheable</a> buf, |
| boolean inMemory)</code> |
| <div class="block">Add block to cache.</div> |
| </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code>boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/io/hfile/MemcachedBlockCache.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> cacheKey)</code> |
| <div class="block">Evict block from cache.</div> |
| </td> |
| </tr> |
| <tr id="i3" class="rowColor"> |
| <td class="colFirst"><code>int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/io/hfile/MemcachedBlockCache.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> hfileName)</code> |
| <div class="block">This method does nothing so that memcached can handle all evictions.</div> |
| </td> |
| </tr> |
| <tr id="i4" class="altColor"> |
| <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/MemcachedBlockCache.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> cacheKey, |
| boolean caching, |
| boolean repeat, |
| boolean updateCacheMetrics)</code> |
| <div class="block">Fetch block from cache.</div> |
| </td> |
| </tr> |
| <tr id="i5" class="rowColor"> |
| <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/MemcachedBlockCache.html#getBlockCaches--">getBlockCaches</a></span>()</code> </td> |
| </tr> |
| <tr id="i6" class="altColor"> |
| <td class="colFirst"><code>long</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/io/hfile/MemcachedBlockCache.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="i7" class="rowColor"> |
| <td class="colFirst"><code>long</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/io/hfile/MemcachedBlockCache.html#getCurrentDataSize--">getCurrentDataSize</a></span>()</code> |
| <div class="block">Returns the occupied size of data blocks, in bytes.</div> |
| </td> |
| </tr> |
| <tr id="i8" class="altColor"> |
| <td class="colFirst"><code>long</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/io/hfile/MemcachedBlockCache.html#getCurrentSize--">getCurrentSize</a></span>()</code> |
| <div class="block">Returns the occupied size of the block cache, in bytes.</div> |
| </td> |
| </tr> |
| <tr id="i9" class="rowColor"> |
| <td class="colFirst"><code>long</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/io/hfile/MemcachedBlockCache.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="i10" class="altColor"> |
| <td class="colFirst"><code>long</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/io/hfile/MemcachedBlockCache.html#getFreeSize--">getFreeSize</a></span>()</code> |
| <div class="block">Returns the free size of the block cache, in bytes.</div> |
| </td> |
| </tr> |
| <tr id="i11" class="rowColor"> |
| <td class="colFirst"><code>long</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/io/hfile/MemcachedBlockCache.html#getMaxSize--">getMaxSize</a></span>()</code> |
| <div class="block">Returns the Max size of the block cache, in bytes.</div> |
| </td> |
| </tr> |
| <tr id="i12" class="altColor"> |
| <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/MemcachedBlockCache.html#getStats--">getStats</a></span>()</code> |
| <div class="block">Get the statistics for this block cache.</div> |
| </td> |
| </tr> |
| <tr id="i13" class="rowColor"> |
| <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><<a href="../../../../../../org/apache/hadoop/hbase/io/hfile/CachedBlock.html" title="interface in org.apache.hadoop.hbase.io.hfile">CachedBlock</a>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/io/hfile/MemcachedBlockCache.html#iterator--">iterator</a></span>()</code> </td> |
| </tr> |
| <tr id="i14" class="altColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/io/hfile/MemcachedBlockCache.html#shutdown--">shutdown</a></span>()</code> |
| <div class="block">Shutdown the cache.</div> |
| </td> |
| </tr> |
| <tr id="i15" class="rowColor"> |
| <td class="colFirst"><code>long</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/io/hfile/MemcachedBlockCache.html#size--">size</a></span>()</code> |
| <div class="block">Returns the total size of the block cache, in bytes.</div> |
| </td> |
| </tr> |
| </table> |
| <ul class="blockList"> |
| <li class="blockList"><a name="methods.inherited.from.class.java.lang.Object"> |
| <!-- --> |
| </a> |
| <h3>Methods inherited from class java.lang.<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></h3> |
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| <h3>Methods inherited from interface java.lang.<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></h3> |
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| <h4>MEMCACHED_OPTIMIZE_KEY</h4> |
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| <h4>MEMCACHED_DEFAULT_TIMEOUT</h4> |
| <pre>public static final long <a href="../../../../../../src-html/org/apache/hadoop/hbase/io/hfile/MemcachedBlockCache.html#line.71">MEMCACHED_DEFAULT_TIMEOUT</a></pre> |
| <dl> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../../../constant-values.html#org.apache.hadoop.hbase.io.hfile.MemcachedBlockCache.MEMCACHED_DEFAULT_TIMEOUT">Constant Field Values</a></dd> |
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| <h4>MEMCACHED_OPTIMIZE_DEFAULT</h4> |
| <pre>public static final boolean <a href="../../../../../../src-html/org/apache/hadoop/hbase/io/hfile/MemcachedBlockCache.html#line.72">MEMCACHED_OPTIMIZE_DEFAULT</a></pre> |
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| <h4>client</h4> |
| <pre>private final net.spy.memcached.MemcachedClient <a href="../../../../../../src-html/org/apache/hadoop/hbase/io/hfile/MemcachedBlockCache.html#line.74">client</a></pre> |
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| <pre>private final <a href="../../../../../../org/apache/hadoop/hbase/io/hfile/MemcachedBlockCache.HFileBlockTranscoder.html" title="class in org.apache.hadoop.hbase.io.hfile">MemcachedBlockCache.HFileBlockTranscoder</a> <a href="../../../../../../src-html/org/apache/hadoop/hbase/io/hfile/MemcachedBlockCache.html#line.75">tc</a></pre> |
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| <h4>cacheStats</h4> |
| <pre>private final <a href="../../../../../../org/apache/hadoop/hbase/io/hfile/CacheStats.html" title="class in org.apache.hadoop.hbase.io.hfile">CacheStats</a> <a href="../../../../../../src-html/org/apache/hadoop/hbase/io/hfile/MemcachedBlockCache.html#line.76">cacheStats</a></pre> |
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| <h3>Constructor Detail</h3> |
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| <h4>MemcachedBlockCache</h4> |
| <pre>public <a href="../../../../../../src-html/org/apache/hadoop/hbase/io/hfile/MemcachedBlockCache.html#line.78">MemcachedBlockCache</a>(org.apache.hadoop.conf.Configuration c) |
| 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> |
| <dl> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
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| <h3>Method Detail</h3> |
| <a name="cacheBlock-org.apache.hadoop.hbase.io.hfile.BlockCacheKey-org.apache.hadoop.hbase.io.hfile.Cacheable-boolean-"> |
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| <h4>cacheBlock</h4> |
| <pre>public void <a href="../../../../../../src-html/org/apache/hadoop/hbase/io/hfile/MemcachedBlockCache.html#line.114">cacheBlock</a>(<a href="../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCacheKey.html" title="class in org.apache.hadoop.hbase.io.hfile">BlockCacheKey</a> cacheKey, |
| <a href="../../../../../../org/apache/hadoop/hbase/io/hfile/Cacheable.html" title="interface in org.apache.hadoop.hbase.io.hfile">Cacheable</a> buf, |
| boolean inMemory)</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCache.html#cacheBlock-org.apache.hadoop.hbase.io.hfile.BlockCacheKey-org.apache.hadoop.hbase.io.hfile.Cacheable-boolean-">BlockCache</a></code></span></div> |
| <div class="block">Add block to cache.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCache.html#cacheBlock-org.apache.hadoop.hbase.io.hfile.BlockCacheKey-org.apache.hadoop.hbase.io.hfile.Cacheable-boolean-">cacheBlock</a></code> in interface <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> - The block's cache key.</dd> |
| <dd><code>buf</code> - The block contents wrapped in a ByteBuffer.</dd> |
| <dd><code>inMemory</code> - Whether block should be treated as in-memory</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="cacheBlock-org.apache.hadoop.hbase.io.hfile.BlockCacheKey-org.apache.hadoop.hbase.io.hfile.Cacheable-"> |
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| <ul class="blockList"> |
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| <h4>cacheBlock</h4> |
| <pre>public void <a href="../../../../../../src-html/org/apache/hadoop/hbase/io/hfile/MemcachedBlockCache.html#line.119">cacheBlock</a>(<a href="../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCacheKey.html" title="class in org.apache.hadoop.hbase.io.hfile">BlockCacheKey</a> cacheKey, |
| <a href="../../../../../../org/apache/hadoop/hbase/io/hfile/Cacheable.html" title="interface in org.apache.hadoop.hbase.io.hfile">Cacheable</a> buf)</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCache.html#cacheBlock-org.apache.hadoop.hbase.io.hfile.BlockCacheKey-org.apache.hadoop.hbase.io.hfile.Cacheable-">BlockCache</a></code></span></div> |
| <div class="block">Add block to cache (defaults to not in-memory).</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCache.html#cacheBlock-org.apache.hadoop.hbase.io.hfile.BlockCacheKey-org.apache.hadoop.hbase.io.hfile.Cacheable-">cacheBlock</a></code> in interface <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> - The block's cache key.</dd> |
| <dd><code>buf</code> - The object to cache.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="getBlock-org.apache.hadoop.hbase.io.hfile.BlockCacheKey-boolean-boolean-boolean-"> |
| <!-- --> |
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| <h4>getBlock</h4> |
| <pre>public <a href="../../../../../../org/apache/hadoop/hbase/io/hfile/Cacheable.html" title="interface in org.apache.hadoop.hbase.io.hfile">Cacheable</a> <a href="../../../../../../src-html/org/apache/hadoop/hbase/io/hfile/MemcachedBlockCache.html#line.131">getBlock</a>(<a href="../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCacheKey.html" title="class in org.apache.hadoop.hbase.io.hfile">BlockCacheKey</a> cacheKey, |
| boolean caching, |
| boolean repeat, |
| boolean updateCacheMetrics)</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCache.html#getBlock-org.apache.hadoop.hbase.io.hfile.BlockCacheKey-boolean-boolean-boolean-">BlockCache</a></code></span></div> |
| <div class="block">Fetch block from cache.</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> in interface <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 fetch.</dd> |
| <dd><code>caching</code> - Whether this request has caching enabled (used for stats)</dd> |
| <dd><code>repeat</code> - Whether this is a repeat lookup for the same block |
| (used to avoid double counting cache misses when doing double-check locking)</dd> |
| <dd><code>updateCacheMetrics</code> - Whether to update cache metrics or not</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>Block or null if block is not in 2 cache.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="evictBlock-org.apache.hadoop.hbase.io.hfile.BlockCacheKey-"> |
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| </a> |
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| <li class="blockList"> |
| <h4>evictBlock</h4> |
| <pre>public boolean <a href="../../../../../../src-html/org/apache/hadoop/hbase/io/hfile/MemcachedBlockCache.html#line.163">evictBlock</a>(<a href="../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCacheKey.html" title="class in org.apache.hadoop.hbase.io.hfile">BlockCacheKey</a> cacheKey)</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCache.html#evictBlock-org.apache.hadoop.hbase.io.hfile.BlockCacheKey-">BlockCache</a></code></span></div> |
| <div class="block">Evict block from cache.</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> in interface <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 if block existed and was evicted, false if not</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="evictBlocksByHfileName-java.lang.String-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>evictBlocksByHfileName</h4> |
| <pre>public int <a href="../../../../../../src-html/org/apache/hadoop/hbase/io/hfile/MemcachedBlockCache.html#line.182">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> hfileName)</pre> |
| <div class="block">This method does nothing so that memcached can handle all evictions.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCache.html#evictBlocksByHfileName-java.lang.String-">evictBlocksByHfileName</a></code> in interface <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>the number of blocks evicted</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="getStats--"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>getStats</h4> |
| <pre>public <a href="../../../../../../org/apache/hadoop/hbase/io/hfile/CacheStats.html" title="class in org.apache.hadoop.hbase.io.hfile">CacheStats</a> <a href="../../../../../../src-html/org/apache/hadoop/hbase/io/hfile/MemcachedBlockCache.html#line.187">getStats</a>()</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from interface: <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> in interface <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>Stats</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="shutdown--"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>shutdown</h4> |
| <pre>public void <a href="../../../../../../src-html/org/apache/hadoop/hbase/io/hfile/MemcachedBlockCache.html#line.192">shutdown</a>()</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCache.html#shutdown--">BlockCache</a></code></span></div> |
| <div class="block">Shutdown the cache.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCache.html#shutdown--">shutdown</a></code> in interface <code><a href="../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCache.html" title="interface in org.apache.hadoop.hbase.io.hfile">BlockCache</a></code></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="size--"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>size</h4> |
| <pre>public long <a href="../../../../../../src-html/org/apache/hadoop/hbase/io/hfile/MemcachedBlockCache.html#line.197">size</a>()</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from interface: <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> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCache.html#size--">size</a></code> in interface <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> |
| </dl> |
| </li> |
| </ul> |
| <a name="getMaxSize--"> |
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| </a> |
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| <h4>getMaxSize</h4> |
| <pre>public long <a href="../../../../../../src-html/org/apache/hadoop/hbase/io/hfile/MemcachedBlockCache.html#line.202">getMaxSize</a>()</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCache.html#getMaxSize--">BlockCache</a></code></span></div> |
| <div class="block">Returns the Max size of the block cache, in bytes.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCache.html#getMaxSize--">getMaxSize</a></code> in interface <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> |
| </dl> |
| </li> |
| </ul> |
| <a name="getFreeSize--"> |
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| <h4>getFreeSize</h4> |
| <pre>public long <a href="../../../../../../src-html/org/apache/hadoop/hbase/io/hfile/MemcachedBlockCache.html#line.207">getFreeSize</a>()</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCache.html#getFreeSize--">BlockCache</a></code></span></div> |
| <div class="block">Returns the free size of the block cache, in bytes.</div> |
| <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> in interface <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>free space in cache, in bytes</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="getCurrentSize--"> |
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| <h4>getCurrentSize</h4> |
| <pre>public long <a href="../../../../../../src-html/org/apache/hadoop/hbase/io/hfile/MemcachedBlockCache.html#line.212">getCurrentSize</a>()</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCache.html#getCurrentSize--">BlockCache</a></code></span></div> |
| <div class="block">Returns the occupied size of the block cache, in bytes.</div> |
| <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> in interface <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>occupied space in cache, in bytes</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="getCurrentDataSize--"> |
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| <h4>getCurrentDataSize</h4> |
| <pre>public long <a href="../../../../../../src-html/org/apache/hadoop/hbase/io/hfile/MemcachedBlockCache.html#line.217">getCurrentDataSize</a>()</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCache.html#getCurrentDataSize--">BlockCache</a></code></span></div> |
| <div class="block">Returns the occupied size of data blocks, in bytes.</div> |
| <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> in interface <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>occupied space in cache, in bytes</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="getBlockCount--"> |
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| <h4>getBlockCount</h4> |
| <pre>public long <a href="../../../../../../src-html/org/apache/hadoop/hbase/io/hfile/MemcachedBlockCache.html#line.222">getBlockCount</a>()</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCache.html#getBlockCount--">BlockCache</a></code></span></div> |
| <div class="block">Returns the number of blocks currently cached in the block cache.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCache.html#getBlockCount--">getBlockCount</a></code> in interface <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>number of blocks in the cache</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="getDataBlockCount--"> |
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| <h4>getDataBlockCount</h4> |
| <pre>public long <a href="../../../../../../src-html/org/apache/hadoop/hbase/io/hfile/MemcachedBlockCache.html#line.227">getDataBlockCount</a>()</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCache.html#getDataBlockCount--">BlockCache</a></code></span></div> |
| <div class="block">Returns the number of data blocks currently cached in the block cache.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCache.html#getDataBlockCount--">getDataBlockCount</a></code> in interface <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>number of blocks in the cache</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="iterator--"> |
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| <h4>iterator</h4> |
| <pre>public <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><<a href="../../../../../../org/apache/hadoop/hbase/io/hfile/CachedBlock.html" title="interface in org.apache.hadoop.hbase.io.hfile">CachedBlock</a>> <a href="../../../../../../src-html/org/apache/hadoop/hbase/io/hfile/MemcachedBlockCache.html#line.232">iterator</a>()</pre> |
| <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> in interface <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><<a href="../../../../../../org/apache/hadoop/hbase/io/hfile/CachedBlock.html" title="interface in org.apache.hadoop.hbase.io.hfile">CachedBlock</a>></code></dd> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCache.html#iterator--">iterator</a></code> in interface <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>Iterator over the blocks in the cache.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="getBlockCaches--"> |
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| <h4>getBlockCaches</h4> |
| <pre>public <a href="../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCache.html" title="interface in org.apache.hadoop.hbase.io.hfile">BlockCache</a>[] <a href="../../../../../../src-html/org/apache/hadoop/hbase/io/hfile/MemcachedBlockCache.html#line.252">getBlockCaches</a>()</pre> |
| <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> in interface <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>The list of sub blockcaches that make up this one; returns null if no sub caches.</dd> |
| </dl> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| </li> |
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