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<div class="subTitle">org.apache.spark</div>
<h2 title="Class ShuffleDependency" class="title">Class ShuffleDependency&lt;K,V,C&gt;</h2>
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<ul class="inheritance">
<li>Object</li>
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<ul class="inheritance">
<li><a href="../../../org/apache/spark/Dependency.html" title="class in org.apache.spark">org.apache.spark.Dependency</a>&lt;scala.Product2&lt;K,V&gt;&gt;</li>
<li>
<ul class="inheritance">
<li>org.apache.spark.ShuffleDependency&lt;K,V,C&gt;</li>
</ul>
</li>
</ul>
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<dt>All Implemented Interfaces:</dt>
<dd>java.io.Serializable, org.apache.spark.internal.Logging</dd>
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<pre>public class <span class="typeNameLabel">ShuffleDependency&lt;K,V,C&gt;</span>
extends <a href="../../../org/apache/spark/Dependency.html" title="class in org.apache.spark">Dependency</a>&lt;scala.Product2&lt;K,V&gt;&gt;
implements org.apache.spark.internal.Logging</pre>
<div class="block">:: DeveloperApi ::
Represents a dependency on the output of a shuffle stage. Note that in the case of shuffle,
the RDD is transient since we don't need it on the executor side.
<p>
param: _rdd the parent RDD
param: partitioner partitioner used to partition the shuffle output
param: serializer <a href="../../../org/apache/spark/serializer/Serializer.html" title="class in org.apache.spark.serializer"><code>Serializer</code></a> to use. If not set
explicitly then the default serializer, as specified by <code>spark.serializer</code>
config option, will be used.
param: keyOrdering key ordering for RDD's shuffles
param: aggregator map/reduce-side aggregator for RDD's shuffle
param: mapSideCombine whether to perform partial aggregation (also known as map-side combine)
param: shuffleWriterProcessor the processor to control the write behavior in ShuffleMapTask</div>
<dl>
<dt><span class="seeLabel">See Also:</span></dt>
<dd><a href="../../../serialized-form.html#org.apache.spark.ShuffleDependency">Serialized Form</a></dd>
</dl>
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<code>org.apache.spark.internal.Logging.SparkShellLoggingFilter</code></li>
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<caption><span>Constructors</span><span class="tabEnd">&nbsp;</span></caption>
<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/spark/ShuffleDependency.html#ShuffleDependency-org.apache.spark.rdd.RDD-org.apache.spark.Partitioner-org.apache.spark.serializer.Serializer-scala.Option-scala.Option-boolean-org.apache.spark.shuffle.ShuffleWriteProcessor-scala.reflect.ClassTag-scala.reflect.ClassTag-scala.reflect.ClassTag-">ShuffleDependency</a></span>(<a href="../../../org/apache/spark/rdd/RDD.html" title="class in org.apache.spark.rdd">RDD</a>&lt;? extends scala.Product2&lt;<a href="../../../org/apache/spark/ShuffleDependency.html" title="type parameter in ShuffleDependency">K</a>,<a href="../../../org/apache/spark/ShuffleDependency.html" title="type parameter in ShuffleDependency">V</a>&gt;&gt;&nbsp;_rdd,
<a href="../../../org/apache/spark/Partitioner.html" title="class in org.apache.spark">Partitioner</a>&nbsp;partitioner,
<a href="../../../org/apache/spark/serializer/Serializer.html" title="class in org.apache.spark.serializer">Serializer</a>&nbsp;serializer,
scala.Option&lt;scala.math.Ordering&lt;<a href="../../../org/apache/spark/ShuffleDependency.html" title="type parameter in ShuffleDependency">K</a>&gt;&gt;&nbsp;keyOrdering,
scala.Option&lt;<a href="../../../org/apache/spark/Aggregator.html" title="class in org.apache.spark">Aggregator</a>&lt;<a href="../../../org/apache/spark/ShuffleDependency.html" title="type parameter in ShuffleDependency">K</a>,<a href="../../../org/apache/spark/ShuffleDependency.html" title="type parameter in ShuffleDependency">V</a>,<a href="../../../org/apache/spark/ShuffleDependency.html" title="type parameter in ShuffleDependency">C</a>&gt;&gt;&nbsp;aggregator,
boolean&nbsp;mapSideCombine,
org.apache.spark.shuffle.ShuffleWriteProcessor&nbsp;shuffleWriterProcessor,
scala.reflect.ClassTag&lt;<a href="../../../org/apache/spark/ShuffleDependency.html" title="type parameter in ShuffleDependency">K</a>&gt;&nbsp;evidence$1,
scala.reflect.ClassTag&lt;<a href="../../../org/apache/spark/ShuffleDependency.html" title="type parameter in ShuffleDependency">V</a>&gt;&nbsp;evidence$2,
scala.reflect.ClassTag&lt;<a href="../../../org/apache/spark/ShuffleDependency.html" title="type parameter in ShuffleDependency">C</a>&gt;&nbsp;evidence$3)</code>&nbsp;</td>
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<caption><span id="t0" class="activeTableTab"><span>All Methods</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>scala.Option&lt;<a href="../../../org/apache/spark/Aggregator.html" title="class in org.apache.spark">Aggregator</a>&lt;<a href="../../../org/apache/spark/ShuffleDependency.html" title="type parameter in ShuffleDependency">K</a>,<a href="../../../org/apache/spark/ShuffleDependency.html" title="type parameter in ShuffleDependency">V</a>,<a href="../../../org/apache/spark/ShuffleDependency.html" title="type parameter in ShuffleDependency">C</a>&gt;&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/apache/spark/ShuffleDependency.html#aggregator--">aggregator</a></span>()</code>&nbsp;</td>
</tr>
<tr id="i1" class="rowColor">
<td class="colFirst"><code>scala.collection.Seq&lt;<a href="../../../org/apache/spark/storage/BlockManagerId.html" title="class in org.apache.spark.storage">BlockManagerId</a>&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/apache/spark/ShuffleDependency.html#getMergerLocs--">getMergerLocs</a></span>()</code>&nbsp;</td>
</tr>
<tr id="i2" class="altColor">
<td class="colFirst"><code>scala.Option&lt;scala.math.Ordering&lt;<a href="../../../org/apache/spark/ShuffleDependency.html" title="type parameter in ShuffleDependency">K</a>&gt;&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/apache/spark/ShuffleDependency.html#keyOrdering--">keyOrdering</a></span>()</code>&nbsp;</td>
</tr>
<tr id="i3" class="rowColor">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/apache/spark/ShuffleDependency.html#mapSideCombine--">mapSideCombine</a></span>()</code>&nbsp;</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/spark/ShuffleDependency.html#newShuffleMergeState--">newShuffleMergeState</a></span>()</code>&nbsp;</td>
</tr>
<tr id="i5" class="rowColor">
<td class="colFirst"><code><a href="../../../org/apache/spark/Partitioner.html" title="class in org.apache.spark">Partitioner</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/apache/spark/ShuffleDependency.html#partitioner--">partitioner</a></span>()</code>&nbsp;</td>
</tr>
<tr id="i6" class="altColor">
<td class="colFirst"><code><a href="../../../org/apache/spark/rdd/RDD.html" title="class in org.apache.spark.rdd">RDD</a>&lt;scala.Product2&lt;<a href="../../../org/apache/spark/ShuffleDependency.html" title="type parameter in ShuffleDependency">K</a>,<a href="../../../org/apache/spark/ShuffleDependency.html" title="type parameter in ShuffleDependency">V</a>&gt;&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/apache/spark/ShuffleDependency.html#rdd--">rdd</a></span>()</code>&nbsp;</td>
</tr>
<tr id="i7" class="rowColor">
<td class="colFirst"><code><a href="../../../org/apache/spark/serializer/Serializer.html" title="class in org.apache.spark.serializer">Serializer</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/apache/spark/ShuffleDependency.html#serializer--">serializer</a></span>()</code>&nbsp;</td>
</tr>
<tr id="i8" class="altColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/apache/spark/ShuffleDependency.html#setMergerLocs-scala.collection.Seq-">setMergerLocs</a></span>(scala.collection.Seq&lt;<a href="../../../org/apache/spark/storage/BlockManagerId.html" title="class in org.apache.spark.storage">BlockManagerId</a>&gt;&nbsp;mergerLocs)</code>&nbsp;</td>
</tr>
<tr id="i9" class="rowColor">
<td class="colFirst"><code>org.apache.spark.shuffle.ShuffleHandle</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/apache/spark/ShuffleDependency.html#shuffleHandle--">shuffleHandle</a></span>()</code>&nbsp;</td>
</tr>
<tr id="i10" class="altColor">
<td class="colFirst"><code>int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/apache/spark/ShuffleDependency.html#shuffleId--">shuffleId</a></span>()</code>&nbsp;</td>
</tr>
<tr id="i11" class="rowColor">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/apache/spark/ShuffleDependency.html#shuffleMergeAllowed--">shuffleMergeAllowed</a></span>()</code>&nbsp;</td>
</tr>
<tr id="i12" class="altColor">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/apache/spark/ShuffleDependency.html#shuffleMergeEnabled--">shuffleMergeEnabled</a></span>()</code>&nbsp;</td>
</tr>
<tr id="i13" class="rowColor">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/apache/spark/ShuffleDependency.html#shuffleMergeFinalized--">shuffleMergeFinalized</a></span>()</code>
<div class="block">Returns true if push-based shuffle is disabled or if the shuffle merge for
this shuffle is finalized.</div>
</td>
</tr>
<tr id="i14" class="altColor">
<td class="colFirst"><code>int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/apache/spark/ShuffleDependency.html#shuffleMergeId--">shuffleMergeId</a></span>()</code>
<div class="block">shuffleMergeId is used to uniquely identify merging process of shuffle
by an indeterminate stage attempt.</div>
</td>
</tr>
<tr id="i15" class="rowColor">
<td class="colFirst"><code>org.apache.spark.shuffle.ShuffleWriteProcessor</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/apache/spark/ShuffleDependency.html#shuffleWriterProcessor--">shuffleWriterProcessor</a></span>()</code>&nbsp;</td>
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<h3>Methods inherited from class&nbsp;Object</h3>
<code>equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait</code></li>
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<h3>Methods inherited from interface&nbsp;org.apache.spark.internal.Logging</h3>
<code>$init$, initializeForcefully, initializeLogIfNecessary, initializeLogIfNecessary, initializeLogIfNecessary$default$2, initLock, isTraceEnabled, log, logDebug, logDebug, logError, logError, logInfo, logInfo, logName, logTrace, logTrace, logWarning, logWarning, org$apache$spark$internal$Logging$$log__$eq, org$apache$spark$internal$Logging$$log_, uninitialize</code></li>
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<h3>Constructor Detail</h3>
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<h4>ShuffleDependency</h4>
<pre>public&nbsp;ShuffleDependency(<a href="../../../org/apache/spark/rdd/RDD.html" title="class in org.apache.spark.rdd">RDD</a>&lt;? extends scala.Product2&lt;<a href="../../../org/apache/spark/ShuffleDependency.html" title="type parameter in ShuffleDependency">K</a>,<a href="../../../org/apache/spark/ShuffleDependency.html" title="type parameter in ShuffleDependency">V</a>&gt;&gt;&nbsp;_rdd,
<a href="../../../org/apache/spark/Partitioner.html" title="class in org.apache.spark">Partitioner</a>&nbsp;partitioner,
<a href="../../../org/apache/spark/serializer/Serializer.html" title="class in org.apache.spark.serializer">Serializer</a>&nbsp;serializer,
scala.Option&lt;scala.math.Ordering&lt;<a href="../../../org/apache/spark/ShuffleDependency.html" title="type parameter in ShuffleDependency">K</a>&gt;&gt;&nbsp;keyOrdering,
scala.Option&lt;<a href="../../../org/apache/spark/Aggregator.html" title="class in org.apache.spark">Aggregator</a>&lt;<a href="../../../org/apache/spark/ShuffleDependency.html" title="type parameter in ShuffleDependency">K</a>,<a href="../../../org/apache/spark/ShuffleDependency.html" title="type parameter in ShuffleDependency">V</a>,<a href="../../../org/apache/spark/ShuffleDependency.html" title="type parameter in ShuffleDependency">C</a>&gt;&gt;&nbsp;aggregator,
boolean&nbsp;mapSideCombine,
org.apache.spark.shuffle.ShuffleWriteProcessor&nbsp;shuffleWriterProcessor,
scala.reflect.ClassTag&lt;<a href="../../../org/apache/spark/ShuffleDependency.html" title="type parameter in ShuffleDependency">K</a>&gt;&nbsp;evidence$1,
scala.reflect.ClassTag&lt;<a href="../../../org/apache/spark/ShuffleDependency.html" title="type parameter in ShuffleDependency">V</a>&gt;&nbsp;evidence$2,
scala.reflect.ClassTag&lt;<a href="../../../org/apache/spark/ShuffleDependency.html" title="type parameter in ShuffleDependency">C</a>&gt;&nbsp;evidence$3)</pre>
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<h4>partitioner</h4>
<pre>public&nbsp;<a href="../../../org/apache/spark/Partitioner.html" title="class in org.apache.spark">Partitioner</a>&nbsp;partitioner()</pre>
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<h4>serializer</h4>
<pre>public&nbsp;<a href="../../../org/apache/spark/serializer/Serializer.html" title="class in org.apache.spark.serializer">Serializer</a>&nbsp;serializer()</pre>
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<pre>public&nbsp;scala.Option&lt;scala.math.Ordering&lt;<a href="../../../org/apache/spark/ShuffleDependency.html" title="type parameter in ShuffleDependency">K</a>&gt;&gt;&nbsp;keyOrdering()</pre>
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<h4>aggregator</h4>
<pre>public&nbsp;scala.Option&lt;<a href="../../../org/apache/spark/Aggregator.html" title="class in org.apache.spark">Aggregator</a>&lt;<a href="../../../org/apache/spark/ShuffleDependency.html" title="type parameter in ShuffleDependency">K</a>,<a href="../../../org/apache/spark/ShuffleDependency.html" title="type parameter in ShuffleDependency">V</a>,<a href="../../../org/apache/spark/ShuffleDependency.html" title="type parameter in ShuffleDependency">C</a>&gt;&gt;&nbsp;aggregator()</pre>
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<pre>public&nbsp;boolean&nbsp;mapSideCombine()</pre>
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<h4>shuffleWriterProcessor</h4>
<pre>public&nbsp;org.apache.spark.shuffle.ShuffleWriteProcessor&nbsp;shuffleWriterProcessor()</pre>
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<a name="rdd--">
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<h4>rdd</h4>
<pre>public&nbsp;<a href="../../../org/apache/spark/rdd/RDD.html" title="class in org.apache.spark.rdd">RDD</a>&lt;scala.Product2&lt;<a href="../../../org/apache/spark/ShuffleDependency.html" title="type parameter in ShuffleDependency">K</a>,<a href="../../../org/apache/spark/ShuffleDependency.html" title="type parameter in ShuffleDependency">V</a>&gt;&gt;&nbsp;rdd()</pre>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../org/apache/spark/Dependency.html#rdd--">rdd</a></code>&nbsp;in class&nbsp;<code><a href="../../../org/apache/spark/Dependency.html" title="class in org.apache.spark">Dependency</a>&lt;scala.Product2&lt;<a href="../../../org/apache/spark/ShuffleDependency.html" title="type parameter in ShuffleDependency">K</a>,<a href="../../../org/apache/spark/ShuffleDependency.html" title="type parameter in ShuffleDependency">V</a>&gt;&gt;</code></dd>
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<pre>public&nbsp;int&nbsp;shuffleId()</pre>
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<h4>shuffleHandle</h4>
<pre>public&nbsp;org.apache.spark.shuffle.ShuffleHandle&nbsp;shuffleHandle()</pre>
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<pre>public&nbsp;boolean&nbsp;shuffleMergeEnabled()</pre>
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<pre>public&nbsp;boolean&nbsp;shuffleMergeAllowed()</pre>
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<h4>shuffleMergeId</h4>
<pre>public&nbsp;int&nbsp;shuffleMergeId()</pre>
<div class="block">shuffleMergeId is used to uniquely identify merging process of shuffle
by an indeterminate stage attempt.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>(undocumented)</dd>
</dl>
</li>
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<pre>public&nbsp;void&nbsp;setMergerLocs(scala.collection.Seq&lt;<a href="../../../org/apache/spark/storage/BlockManagerId.html" title="class in org.apache.spark.storage">BlockManagerId</a>&gt;&nbsp;mergerLocs)</pre>
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<pre>public&nbsp;scala.collection.Seq&lt;<a href="../../../org/apache/spark/storage/BlockManagerId.html" title="class in org.apache.spark.storage">BlockManagerId</a>&gt;&nbsp;getMergerLocs()</pre>
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<pre>public&nbsp;boolean&nbsp;shuffleMergeFinalized()</pre>
<div class="block">Returns true if push-based shuffle is disabled or if the shuffle merge for
this shuffle is finalized.</div>
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<pre>public&nbsp;void&nbsp;newShuffleMergeState()</pre>
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