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<div class="subTitle">org.apache.sysds.runtime.controlprogram.parfor</div>
<h2 title="Class ResultMerge" class="title">Class ResultMerge</h2>
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<dt>All Implemented Interfaces:</dt>
<dd><a href="https://docs.oracle.com/javase/8/docs/api/java/io/Serializable.html?is-external=true" title="class or interface in java.io">Serializable</a></dd>
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<dl>
<dt>Direct Known Subclasses:</dt>
<dd><a href="../../../../../../org/apache/sysds/runtime/controlprogram/parfor/ResultMergeLocalAutomatic.html" title="class in org.apache.sysds.runtime.controlprogram.parfor">ResultMergeLocalAutomatic</a>, <a href="../../../../../../org/apache/sysds/runtime/controlprogram/parfor/ResultMergeLocalFile.html" title="class in org.apache.sysds.runtime.controlprogram.parfor">ResultMergeLocalFile</a>, <a href="../../../../../../org/apache/sysds/runtime/controlprogram/parfor/ResultMergeLocalMemory.html" title="class in org.apache.sysds.runtime.controlprogram.parfor">ResultMergeLocalMemory</a>, <a href="../../../../../../org/apache/sysds/runtime/controlprogram/parfor/ResultMergeRemoteSpark.html" title="class in org.apache.sysds.runtime.controlprogram.parfor">ResultMergeRemoteSpark</a>, <a href="../../../../../../org/apache/sysds/runtime/controlprogram/parfor/ResultMergeRemoteSparkWCompare.html" title="class in org.apache.sysds.runtime.controlprogram.parfor">ResultMergeRemoteSparkWCompare</a></dd>
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<pre>public abstract class <span class="typeNameLabel">ResultMerge</span>
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="https://docs.oracle.com/javase/8/docs/api/java/io/Serializable.html?is-external=true" title="class or interface in java.io">Serializable</a></pre>
<div class="block">Due to independence of all iterations, any result has the following properties:
(1) non local var, (2) matrix object, and (3) completely independent.
These properties allow us to realize result merging in parallel without any synchronization.</div>
<dl>
<dt><span class="seeLabel">See Also:</span></dt>
<dd><a href="../../../../../../serialized-form.html#org.apache.sysds.runtime.controlprogram.parfor.ResultMerge">Serialized Form</a></dd>
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<!-- =========== FIELD SUMMARY =========== -->
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<h3>Field Summary</h3>
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<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>protected <a href="../../../../../../org/apache/sysds/runtime/controlprogram/caching/MatrixObject.html" title="class in org.apache.sysds.runtime.controlprogram.caching">MatrixObject</a>[]</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/sysds/runtime/controlprogram/parfor/ResultMerge.html#Z:Z_inputs">_inputs</a></span></code>&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>protected boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/sysds/runtime/controlprogram/parfor/ResultMerge.html#Z:Z_isAccum">_isAccum</a></span></code>&nbsp;</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>protected <a href="../../../../../../org/apache/sysds/runtime/controlprogram/caching/MatrixObject.html" title="class in org.apache.sysds.runtime.controlprogram.caching">MatrixObject</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/sysds/runtime/controlprogram/parfor/ResultMerge.html#Z:Z_output">_output</a></span></code>&nbsp;</td>
</tr>
<tr 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/sysds/runtime/controlprogram/parfor/ResultMerge.html#Z:Z_outputFName">_outputFName</a></span></code>&nbsp;</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>protected static org.apache.commons.logging.Log</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/sysds/runtime/controlprogram/parfor/ResultMerge.html#LOG">LOG</a></span></code>&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>protected 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/sysds/runtime/controlprogram/parfor/ResultMerge.html#NAME_SUFFIX">NAME_SUFFIX</a></span></code>&nbsp;</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>protected static <a href="../../../../../../org/apache/sysds/runtime/matrix/operators/BinaryOperator.html" title="class in org.apache.sysds.runtime.matrix.operators">BinaryOperator</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/sysds/runtime/controlprogram/parfor/ResultMerge.html#PLUS">PLUS</a></span></code>&nbsp;</td>
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<td class="colFirst"><code>protected </code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/sysds/runtime/controlprogram/parfor/ResultMerge.html#ResultMerge--">ResultMerge</a></span>()</code>&nbsp;</td>
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<tr class="rowColor">
<td class="colFirst"><code>&nbsp;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/sysds/runtime/controlprogram/parfor/ResultMerge.html#ResultMerge-org.apache.sysds.runtime.controlprogram.caching.MatrixObject-org.apache.sysds.runtime.controlprogram.caching.MatrixObject:A-java.lang.String-boolean-">ResultMerge</a></span>(<a href="../../../../../../org/apache/sysds/runtime/controlprogram/caching/MatrixObject.html" title="class in org.apache.sysds.runtime.controlprogram.caching">MatrixObject</a>&nbsp;out,
<a href="../../../../../../org/apache/sysds/runtime/controlprogram/caching/MatrixObject.html" title="class in org.apache.sysds.runtime.controlprogram.caching">MatrixObject</a>[]&nbsp;in,
<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;outputFilename,
boolean&nbsp;accum)</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="t3" class="tableTab"><span><a href="javascript:show(4);">Abstract 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>
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<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Method and Description</th>
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<tr id="i0" class="altColor">
<td class="colFirst"><code>protected long</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/sysds/runtime/controlprogram/parfor/ResultMerge.html#computeNonZeros-org.apache.sysds.runtime.controlprogram.caching.MatrixObject-java.util.List-">computeNonZeros</a></span>(<a href="../../../../../../org/apache/sysds/runtime/controlprogram/caching/MatrixObject.html" title="class in org.apache.sysds.runtime.controlprogram.caching">MatrixObject</a>&nbsp;out,
<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/sysds/runtime/controlprogram/caching/MatrixObject.html" title="class in org.apache.sysds.runtime.controlprogram.caching">MatrixObject</a>&gt;&nbsp;in)</code>&nbsp;</td>
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<tr id="i1" class="rowColor">
<td class="colFirst"><code>abstract <a href="../../../../../../org/apache/sysds/runtime/controlprogram/caching/MatrixObject.html" title="class in org.apache.sysds.runtime.controlprogram.caching">MatrixObject</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/sysds/runtime/controlprogram/parfor/ResultMerge.html#executeParallelMerge-int-">executeParallelMerge</a></span>(int&nbsp;par)</code>
<div class="block">Merge all given input matrices in parallel into the given output matrix.</div>
</td>
</tr>
<tr id="i2" class="altColor">
<td class="colFirst"><code>abstract <a href="../../../../../../org/apache/sysds/runtime/controlprogram/caching/MatrixObject.html" title="class in org.apache.sysds.runtime.controlprogram.caching">MatrixObject</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/sysds/runtime/controlprogram/parfor/ResultMerge.html#executeSerialMerge--">executeSerialMerge</a></span>()</code>
<div class="block">Merge all given input matrices sequentially into the given output matrix.</div>
</td>
</tr>
<tr id="i3" class="rowColor">
<td class="colFirst"><code>protected void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/sysds/runtime/controlprogram/parfor/ResultMerge.html#mergeWithComp-org.apache.sysds.runtime.matrix.data.MatrixBlock-org.apache.sysds.runtime.matrix.data.MatrixBlock-org.apache.sysds.runtime.data.DenseBlock-">mergeWithComp</a></span>(<a href="../../../../../../org/apache/sysds/runtime/matrix/data/MatrixBlock.html" title="class in org.apache.sysds.runtime.matrix.data">MatrixBlock</a>&nbsp;out,
<a href="../../../../../../org/apache/sysds/runtime/matrix/data/MatrixBlock.html" title="class in org.apache.sysds.runtime.matrix.data">MatrixBlock</a>&nbsp;in,
<a href="../../../../../../org/apache/sysds/runtime/data/DenseBlock.html" title="class in org.apache.sysds.runtime.data">DenseBlock</a>&nbsp;compare)</code>
<div class="block">NOTE: append only not applicable for wiht compare because output must be populated with
initial state of matrix - with append, this would result in duplicates.</div>
</td>
</tr>
<tr id="i4" class="altColor">
<td class="colFirst"><code>protected void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/sysds/runtime/controlprogram/parfor/ResultMerge.html#mergeWithoutComp-org.apache.sysds.runtime.matrix.data.MatrixBlock-org.apache.sysds.runtime.matrix.data.MatrixBlock-boolean-">mergeWithoutComp</a></span>(<a href="../../../../../../org/apache/sysds/runtime/matrix/data/MatrixBlock.html" title="class in org.apache.sysds.runtime.matrix.data">MatrixBlock</a>&nbsp;out,
<a href="../../../../../../org/apache/sysds/runtime/matrix/data/MatrixBlock.html" title="class in org.apache.sysds.runtime.matrix.data">MatrixBlock</a>&nbsp;in,
boolean&nbsp;appendOnly)</code>&nbsp;</td>
</tr>
<tr id="i5" class="rowColor">
<td class="colFirst"><code>protected void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/sysds/runtime/controlprogram/parfor/ResultMerge.html#mergeWithoutComp-org.apache.sysds.runtime.matrix.data.MatrixBlock-org.apache.sysds.runtime.matrix.data.MatrixBlock-boolean-boolean-">mergeWithoutComp</a></span>(<a href="../../../../../../org/apache/sysds/runtime/matrix/data/MatrixBlock.html" title="class in org.apache.sysds.runtime.matrix.data">MatrixBlock</a>&nbsp;out,
<a href="../../../../../../org/apache/sysds/runtime/matrix/data/MatrixBlock.html" title="class in org.apache.sysds.runtime.matrix.data">MatrixBlock</a>&nbsp;in,
boolean&nbsp;appendOnly,
boolean&nbsp;par)</code>&nbsp;</td>
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<h3>Methods inherited from class&nbsp;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>
<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#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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<a name="LOG">
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<h4>LOG</h4>
<pre>protected static final&nbsp;org.apache.commons.logging.Log LOG</pre>
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<pre>protected 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> NAME_SUFFIX</pre>
<dl>
<dt><span class="seeLabel">See Also:</span></dt>
<dd><a href="../../../../../../constant-values.html#org.apache.sysds.runtime.controlprogram.parfor.ResultMerge.NAME_SUFFIX">Constant Field Values</a></dd>
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<pre>protected static final&nbsp;<a href="../../../../../../org/apache/sysds/runtime/matrix/operators/BinaryOperator.html" title="class in org.apache.sysds.runtime.matrix.operators">BinaryOperator</a> PLUS</pre>
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<pre>protected&nbsp;<a href="../../../../../../org/apache/sysds/runtime/controlprogram/caching/MatrixObject.html" title="class in org.apache.sysds.runtime.controlprogram.caching">MatrixObject</a> _output</pre>
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<h4>_inputs</h4>
<pre>protected&nbsp;<a href="../../../../../../org/apache/sysds/runtime/controlprogram/caching/MatrixObject.html" title="class in org.apache.sysds.runtime.controlprogram.caching">MatrixObject</a>[] _inputs</pre>
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<pre>protected&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> _outputFName</pre>
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<h3>Constructor Detail</h3>
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<h4>ResultMerge</h4>
<pre>protected&nbsp;ResultMerge()</pre>
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<h4>ResultMerge</h4>
<pre>public&nbsp;ResultMerge(<a href="../../../../../../org/apache/sysds/runtime/controlprogram/caching/MatrixObject.html" title="class in org.apache.sysds.runtime.controlprogram.caching">MatrixObject</a>&nbsp;out,
<a href="../../../../../../org/apache/sysds/runtime/controlprogram/caching/MatrixObject.html" title="class in org.apache.sysds.runtime.controlprogram.caching">MatrixObject</a>[]&nbsp;in,
<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;outputFilename,
boolean&nbsp;accum)</pre>
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<a name="executeSerialMerge--">
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<h4>executeSerialMerge</h4>
<pre>public abstract&nbsp;<a href="../../../../../../org/apache/sysds/runtime/controlprogram/caching/MatrixObject.html" title="class in org.apache.sysds.runtime.controlprogram.caching">MatrixObject</a>&nbsp;executeSerialMerge()</pre>
<div class="block">Merge all given input matrices sequentially into the given output matrix.
The required space in-memory is the size of the output matrix plus the size
of one input matrix at a time.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>output (merged) matrix</dd>
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<h4>executeParallelMerge</h4>
<pre>public abstract&nbsp;<a href="../../../../../../org/apache/sysds/runtime/controlprogram/caching/MatrixObject.html" title="class in org.apache.sysds.runtime.controlprogram.caching">MatrixObject</a>&nbsp;executeParallelMerge(int&nbsp;par)</pre>
<div class="block">Merge all given input matrices in parallel into the given output matrix.
The required space in-memory is the size of the output matrix plus the size
of all input matrices.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>par</code> - degree of parallelism</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>output (merged) matrix</dd>
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<pre>protected&nbsp;void&nbsp;mergeWithoutComp(<a href="../../../../../../org/apache/sysds/runtime/matrix/data/MatrixBlock.html" title="class in org.apache.sysds.runtime.matrix.data">MatrixBlock</a>&nbsp;out,
<a href="../../../../../../org/apache/sysds/runtime/matrix/data/MatrixBlock.html" title="class in org.apache.sysds.runtime.matrix.data">MatrixBlock</a>&nbsp;in,
boolean&nbsp;appendOnly)</pre>
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<h4>mergeWithoutComp</h4>
<pre>protected&nbsp;void&nbsp;mergeWithoutComp(<a href="../../../../../../org/apache/sysds/runtime/matrix/data/MatrixBlock.html" title="class in org.apache.sysds.runtime.matrix.data">MatrixBlock</a>&nbsp;out,
<a href="../../../../../../org/apache/sysds/runtime/matrix/data/MatrixBlock.html" title="class in org.apache.sysds.runtime.matrix.data">MatrixBlock</a>&nbsp;in,
boolean&nbsp;appendOnly,
boolean&nbsp;par)</pre>
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<pre>protected&nbsp;void&nbsp;mergeWithComp(<a href="../../../../../../org/apache/sysds/runtime/matrix/data/MatrixBlock.html" title="class in org.apache.sysds.runtime.matrix.data">MatrixBlock</a>&nbsp;out,
<a href="../../../../../../org/apache/sysds/runtime/matrix/data/MatrixBlock.html" title="class in org.apache.sysds.runtime.matrix.data">MatrixBlock</a>&nbsp;in,
<a href="../../../../../../org/apache/sysds/runtime/data/DenseBlock.html" title="class in org.apache.sysds.runtime.data">DenseBlock</a>&nbsp;compare)</pre>
<div class="block">NOTE: append only not applicable for wiht compare because output must be populated with
initial state of matrix - with append, this would result in duplicates.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>out</code> - output matrix block</dd>
<dd><code>in</code> - input matrix block</dd>
<dd><code>compare</code> - ?</dd>
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<pre>protected&nbsp;long&nbsp;computeNonZeros(<a href="../../../../../../org/apache/sysds/runtime/controlprogram/caching/MatrixObject.html" title="class in org.apache.sysds.runtime.controlprogram.caching">MatrixObject</a>&nbsp;out,
<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/sysds/runtime/controlprogram/caching/MatrixObject.html" title="class in org.apache.sysds.runtime.controlprogram.caching">MatrixObject</a>&gt;&nbsp;in)</pre>
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