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| <div class="subTitle">org.apache.hadoop.hbase.regionserver</div> |
| <h2 title="Class MemStoreCompactor" class="title">Class MemStoreCompactor</h2> |
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| <ul class="inheritance"> |
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| <li>org.apache.hadoop.hbase.regionserver.MemStoreCompactor</li> |
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| <pre>@InterfaceAudience.Private |
| public class <a href="../../../../../src-html/org/apache/hadoop/hbase/regionserver/MemStoreCompactor.html#line.47">MemStoreCompactor</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></pre> |
| <div class="block">The ongoing MemStore Compaction manager, dispatches a solo running compaction and interrupts |
| the compaction if requested. The compaction is interrupted and stopped by CompactingMemStore, |
| for example when another compaction needs to be started. |
| Prior to compaction the MemStoreCompactor evaluates |
| the compacting ratio and aborts the compaction if it is not worthy. |
| The MemStoreScanner is used to traverse the compaction pipeline. The MemStoreScanner |
| is included in internal store scanner, where all compaction logic is implemented. |
| Threads safety: It is assumed that the compaction pipeline is immutable, |
| therefore no special synchronization is required.</div> |
| </li> |
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| <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/regionserver/CompactingMemStore.html" title="class in org.apache.hadoop.hbase.regionserver">CompactingMemStore</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/regionserver/MemStoreCompactor.html#compactingMemStore">compactingMemStore</a></span></code> </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/regionserver/MemStoreCompactor.html#compactionKVMax">compactionKVMax</a></span></code> </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>static long</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/regionserver/MemStoreCompactor.html#DEEP_OVERHEAD">DEEP_OVERHEAD</a></span></code> </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/regionserver/MemStoreCompactor.html#isInterrupted">isInterrupted</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/regionserver/MemStoreCompactor.html#LOG">LOG</a></span></code> </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>private <a href="../../../../../org/apache/hadoop/hbase/regionserver/MemStoreCompactionStrategy.html" title="class in org.apache.hadoop.hbase.regionserver">MemStoreCompactionStrategy</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/regionserver/MemStoreCompactor.html#strategy">strategy</a></span></code> </td> |
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| <tr class="altColor"> |
| <td class="colFirst"><code>private <a href="../../../../../org/apache/hadoop/hbase/regionserver/VersionedSegmentsList.html" title="class in org.apache.hadoop.hbase.regionserver">VersionedSegmentsList</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/regionserver/MemStoreCompactor.html#versionedList">versionedList</a></span></code> </td> |
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| <tr> |
| <th class="colOne" scope="col">Constructor and Description</th> |
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| <tr class="altColor"> |
| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/regionserver/MemStoreCompactor.html#MemStoreCompactor-org.apache.hadoop.hbase.regionserver.CompactingMemStore-org.apache.hadoop.hbase.MemoryCompactionPolicy-">MemStoreCompactor</a></span>(<a href="../../../../../org/apache/hadoop/hbase/regionserver/CompactingMemStore.html" title="class in org.apache.hadoop.hbase.regionserver">CompactingMemStore</a> compactingMemStore, |
| <a href="../../../../../org/apache/hadoop/hbase/MemoryCompactionPolicy.html" title="enum in org.apache.hadoop.hbase">MemoryCompactionPolicy</a> compactionPolicy)</code> </td> |
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| <tr> |
| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colLast" scope="col">Method and Description</th> |
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| <td class="colFirst"><code>private <a href="../../../../../org/apache/hadoop/hbase/regionserver/ImmutableSegment.html" title="class in org.apache.hadoop.hbase.regionserver">ImmutableSegment</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/regionserver/MemStoreCompactor.html#createSubstitution-org.apache.hadoop.hbase.regionserver.MemStoreCompactionStrategy.Action-">createSubstitution</a></span>(<a href="../../../../../org/apache/hadoop/hbase/regionserver/MemStoreCompactionStrategy.Action.html" title="enum in org.apache.hadoop.hbase.regionserver">MemStoreCompactionStrategy.Action</a> action)</code> |
| <div class="block">---------------------------------------------------------------------- |
| Creation of the ImmutableSegment either by merge or copy-compact of the segments of the |
| pipeline, based on the Compactor Iterator.</div> |
| </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code>private void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/regionserver/MemStoreCompactor.html#doCompaction--">doCompaction</a></span>()</code> |
| <div class="block">---------------------------------------------------------------------- |
| The worker thread performs the compaction asynchronously.</div> |
| </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code>(package private) void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/regionserver/MemStoreCompactor.html#initiateCompactionStrategy-org.apache.hadoop.hbase.MemoryCompactionPolicy-org.apache.hadoop.conf.Configuration-java.lang.String-">initiateCompactionStrategy</a></span>(<a href="../../../../../org/apache/hadoop/hbase/MemoryCompactionPolicy.html" title="enum in org.apache.hadoop.hbase">MemoryCompactionPolicy</a> compType, |
| org.apache.hadoop.conf.Configuration configuration, |
| <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> cfName)</code> </td> |
| </tr> |
| <tr id="i3" class="rowColor"> |
| <td class="colFirst"><code>private void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/regionserver/MemStoreCompactor.html#releaseResources--">releaseResources</a></span>()</code> |
| <div class="block">---------------------------------------------------------------------- |
| Reset the interruption indicator and clear the pointers in order to allow good |
| garbage collection</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/regionserver/MemStoreCompactor.html#resetStats--">resetStats</a></span>()</code> </td> |
| </tr> |
| <tr id="i5" class="rowColor"> |
| <td class="colFirst"><code>boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/regionserver/MemStoreCompactor.html#start--">start</a></span>()</code> |
| <div class="block">---------------------------------------------------------------------- |
| The request to dispatch the compaction asynchronous task.</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/regionserver/MemStoreCompactor.html#stop--">stop</a></span>()</code> |
| <div class="block">---------------------------------------------------------------------- |
| The request to cancel the compaction asynchronous task |
| The compaction may still happen if the request was sent too late |
| Non-blocking request</div> |
| </td> |
| </tr> |
| <tr id="i7" 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/regionserver/MemStoreCompactor.html#toString--">toString</a></span>()</code> </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#finalize--" title="class or interface in java.lang">finalize</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#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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| <h4>DEEP_OVERHEAD</h4> |
| <pre>public static final long <a href="../../../../../src-html/org/apache/hadoop/hbase/regionserver/MemStoreCompactor.html#line.49">DEEP_OVERHEAD</a></pre> |
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| <pre>private static final org.slf4j.Logger <a href="../../../../../src-html/org/apache/hadoop/hbase/regionserver/MemStoreCompactor.html#line.58">LOG</a></pre> |
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| <pre>private <a href="../../../../../org/apache/hadoop/hbase/regionserver/CompactingMemStore.html" title="class in org.apache.hadoop.hbase.regionserver">CompactingMemStore</a> <a href="../../../../../src-html/org/apache/hadoop/hbase/regionserver/MemStoreCompactor.html#line.59">compactingMemStore</a></pre> |
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| <h3>Constructor Detail</h3> |
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| <h4>MemStoreCompactor</h4> |
| <pre>public <a href="../../../../../src-html/org/apache/hadoop/hbase/regionserver/MemStoreCompactor.html#line.72">MemStoreCompactor</a>(<a href="../../../../../org/apache/hadoop/hbase/regionserver/CompactingMemStore.html" title="class in org.apache.hadoop.hbase.regionserver">CompactingMemStore</a> compactingMemStore, |
| <a href="../../../../../org/apache/hadoop/hbase/MemoryCompactionPolicy.html" title="enum in org.apache.hadoop.hbase">MemoryCompactionPolicy</a> compactionPolicy) |
| throws <a href="../../../../../org/apache/hadoop/hbase/exceptions/IllegalArgumentIOException.html" title="class in org.apache.hadoop.hbase.exceptions">IllegalArgumentIOException</a></pre> |
| <dl> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="../../../../../org/apache/hadoop/hbase/exceptions/IllegalArgumentIOException.html" title="class in org.apache.hadoop.hbase.exceptions">IllegalArgumentIOException</a></code></dd> |
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| <pre>public boolean <a href="../../../../../src-html/org/apache/hadoop/hbase/regionserver/MemStoreCompactor.html#line.91">start</a>() |
| 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">---------------------------------------------------------------------- |
| The request to dispatch the compaction asynchronous task. |
| The method returns true if compaction was successfully dispatched, or false if there |
| is already an ongoing compaction or no segments to compact.</div> |
| <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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| <pre>public void <a href="../../../../../src-html/org/apache/hadoop/hbase/regionserver/MemStoreCompactor.html#line.122">stop</a>()</pre> |
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| The request to cancel the compaction asynchronous task |
| The compaction may still happen if the request was sent too late |
| Non-blocking request</div> |
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| Reset the interruption indicator and clear the pointers in order to allow good |
| garbage collection</div> |
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| <pre>private void <a href="../../../../../src-html/org/apache/hadoop/hbase/regionserver/MemStoreCompactor.html#line.145">doCompaction</a>()</pre> |
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| The worker thread performs the compaction asynchronously. |
| The solo (per compactor) thread only reads the compaction pipeline. |
| There is at most one thread per memstore instance.</div> |
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| <pre>private <a href="../../../../../org/apache/hadoop/hbase/regionserver/ImmutableSegment.html" title="class in org.apache.hadoop.hbase.regionserver">ImmutableSegment</a> <a href="../../../../../src-html/org/apache/hadoop/hbase/regionserver/MemStoreCompactor.html#line.204">createSubstitution</a>(<a href="../../../../../org/apache/hadoop/hbase/regionserver/MemStoreCompactionStrategy.Action.html" title="enum in org.apache.hadoop.hbase.regionserver">MemStoreCompactionStrategy.Action</a> action) |
| 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> |
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| Creation of the ImmutableSegment either by merge or copy-compact of the segments of the |
| pipeline, based on the Compactor Iterator. The new ImmutableSegment is returned.</div> |
| <dl> |
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| <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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| org.apache.hadoop.conf.Configuration configuration, |
| <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> cfName) |
| throws <a href="../../../../../org/apache/hadoop/hbase/exceptions/IllegalArgumentIOException.html" title="class in org.apache.hadoop.hbase.exceptions">IllegalArgumentIOException</a></pre> |
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| <dd><code><a href="../../../../../org/apache/hadoop/hbase/exceptions/IllegalArgumentIOException.html" title="class in org.apache.hadoop.hbase.exceptions">IllegalArgumentIOException</a></code></dd> |
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