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| <h2 title="Interface HadoopFormatIO.Write.PartitionedWriterBuilder" class="title">Interface HadoopFormatIO.Write.PartitionedWriterBuilder<KeyT,ValueT></h2> |
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| <dt><span class="paramLabel">Type Parameters:</span></dt> |
| <dd><code>KeyT</code> - Key type to write</dd> |
| <dd><code>ValueT</code> - Value type to write</dd> |
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| <dt>Enclosing class:</dt> |
| <dd><a href="../../../../../../../org/apache/beam/sdk/io/hadoop/format/HadoopFormatIO.Write.html" title="class in org.apache.beam.sdk.io.hadoop.format">HadoopFormatIO.Write</a><<a href="../../../../../../../org/apache/beam/sdk/io/hadoop/format/HadoopFormatIO.Write.html" title="type parameter in HadoopFormatIO.Write">KeyT</a>,<a href="../../../../../../../org/apache/beam/sdk/io/hadoop/format/HadoopFormatIO.Write.html" title="type parameter in HadoopFormatIO.Write">ValueT</a>></dd> |
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| <pre>public static interface <span class="typeNameLabel">HadoopFormatIO.Write.PartitionedWriterBuilder<KeyT,ValueT></span></pre> |
| <div class="block">Builder for partitioning determining.</div> |
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| <td class="colFirst"><code><a href="../../../../../../../org/apache/beam/sdk/io/hadoop/format/HadoopFormatIO.Write.ExternalSynchronizationBuilder.html" title="interface in org.apache.beam.sdk.io.hadoop.format">HadoopFormatIO.Write.ExternalSynchronizationBuilder</a><<a href="../../../../../../../org/apache/beam/sdk/io/hadoop/format/HadoopFormatIO.Write.PartitionedWriterBuilder.html" title="type parameter in HadoopFormatIO.Write.PartitionedWriterBuilder">KeyT</a>,<a href="../../../../../../../org/apache/beam/sdk/io/hadoop/format/HadoopFormatIO.Write.PartitionedWriterBuilder.html" title="type parameter in HadoopFormatIO.Write.PartitionedWriterBuilder">ValueT</a>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/beam/sdk/io/hadoop/format/HadoopFormatIO.Write.PartitionedWriterBuilder.html#withoutPartitioning--">withoutPartitioning</a></span>()</code> |
| <div class="block">Writes to the sink without need to partition output into specified number of partitions.</div> |
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| <td class="colFirst"><code><a href="../../../../../../../org/apache/beam/sdk/io/hadoop/format/HadoopFormatIO.Write.ExternalSynchronizationBuilder.html" title="interface in org.apache.beam.sdk.io.hadoop.format">HadoopFormatIO.Write.ExternalSynchronizationBuilder</a><<a href="../../../../../../../org/apache/beam/sdk/io/hadoop/format/HadoopFormatIO.Write.PartitionedWriterBuilder.html" title="type parameter in HadoopFormatIO.Write.PartitionedWriterBuilder">KeyT</a>,<a href="../../../../../../../org/apache/beam/sdk/io/hadoop/format/HadoopFormatIO.Write.PartitionedWriterBuilder.html" title="type parameter in HadoopFormatIO.Write.PartitionedWriterBuilder">ValueT</a>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/beam/sdk/io/hadoop/format/HadoopFormatIO.Write.PartitionedWriterBuilder.html#withPartitioning--">withPartitioning</a></span>()</code> |
| <div class="block">Writes to the sink with partitioning by Task Id.</div> |
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| <h4>withPartitioning</h4> |
| <pre><a href="../../../../../../../org/apache/beam/sdk/io/hadoop/format/HadoopFormatIO.Write.ExternalSynchronizationBuilder.html" title="interface in org.apache.beam.sdk.io.hadoop.format">HadoopFormatIO.Write.ExternalSynchronizationBuilder</a><<a href="../../../../../../../org/apache/beam/sdk/io/hadoop/format/HadoopFormatIO.Write.PartitionedWriterBuilder.html" title="type parameter in HadoopFormatIO.Write.PartitionedWriterBuilder">KeyT</a>,<a href="../../../../../../../org/apache/beam/sdk/io/hadoop/format/HadoopFormatIO.Write.PartitionedWriterBuilder.html" title="type parameter in HadoopFormatIO.Write.PartitionedWriterBuilder">ValueT</a>> withPartitioning()</pre> |
| <div class="block">Writes to the sink with partitioning by Task Id. |
| |
| <p>Following Hadoop configuration properties are required with this option: |
| |
| <ul> |
| <li><code>mapreduce.job.reduces</code>: Number of reduce tasks. Value is equal to number of |
| write tasks which will be generated. |
| <li><code>mapreduce.job.partitioner.class</code>: Hadoop partitioner class which will be used |
| for distributing of records among partitions. |
| </ul></div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>WriteBuilder for write transformation</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="withoutPartitioning--"> |
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| <h4>withoutPartitioning</h4> |
| <pre><a href="../../../../../../../org/apache/beam/sdk/io/hadoop/format/HadoopFormatIO.Write.ExternalSynchronizationBuilder.html" title="interface in org.apache.beam.sdk.io.hadoop.format">HadoopFormatIO.Write.ExternalSynchronizationBuilder</a><<a href="../../../../../../../org/apache/beam/sdk/io/hadoop/format/HadoopFormatIO.Write.PartitionedWriterBuilder.html" title="type parameter in HadoopFormatIO.Write.PartitionedWriterBuilder">KeyT</a>,<a href="../../../../../../../org/apache/beam/sdk/io/hadoop/format/HadoopFormatIO.Write.PartitionedWriterBuilder.html" title="type parameter in HadoopFormatIO.Write.PartitionedWriterBuilder">ValueT</a>> withoutPartitioning()</pre> |
| <div class="block">Writes to the sink without need to partition output into specified number of partitions. |
| |
| <p>This write operation doesn't do shuffle by the partition so it saves transfer time |
| before write operation itself. As a consequence it generates random number of partitions. |
| |
| <p><b>Note:</b> Works only for <a href="../../../../../../../org/apache/beam/sdk/values/PCollection.IsBounded.html#BOUNDED"><code>PCollection.IsBounded.BOUNDED</code></a> <a href="../../../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values"><code>PCollection</code></a> with global |
| <a href="../../../../../../../org/apache/beam/sdk/values/WindowingStrategy.html" title="class in org.apache.beam.sdk.values"><code>WindowingStrategy</code></a>.</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>WriteBuilder for write transformation</dd> |
| </dl> |
| </li> |
| </ul> |
| </li> |
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