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   <div class="section" id="module-apache_beam.testing.synthetic_pipeline">
 <span id="apache-beam-testing-synthetic-pipeline-module"></span><h1>apache_beam.testing.synthetic_pipeline module<a class="headerlink" href="#module-apache_beam.testing.synthetic_pipeline" title="Permalink to this headline">¶</a></h1>
 <p>A set of utilities to write pipelines for performance tests.</p>
 <p>This module offers a way to create pipelines using synthetic sources and steps.
 Exact shape of the pipeline and the behaviour of sources and steps can be
 controlled through arguments. Please see function ‘parse_args()’ for more
 details about the arguments.</p>
 <p>Shape of the pipeline is primariy controlled through two arguments. Argument
 ‘steps’ can be used to define a list of steps as a JSON string. Argument
 ‘barrier’ describes how these steps are separated from each other. Argument
 ‘barrier’ can be use to build a pipeline as a a series of steps or a tree of
 steps with a fanin or a fanout of size 2.</p>
 <p>Other arguments describe what gets generated by synthetic sources that produce
 data for the pipeline.</p>
 <dl class="function">
 <dt id="apache_beam.testing.synthetic_pipeline.parse_byte_size">
 <code class="descclassname">apache_beam.testing.synthetic_pipeline.</code><code class="descname">parse_byte_size</code><span class="sig-paren">(</span><em>s</em><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/testing/synthetic_pipeline.html#parse_byte_size"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#apache_beam.testing.synthetic_pipeline.parse_byte_size" title="Permalink to this definition">¶</a></dt>
 <dd></dd></dl>

 <dl class="function">
 <dt id="apache_beam.testing.synthetic_pipeline.div_round_up">
 <code class="descclassname">apache_beam.testing.synthetic_pipeline.</code><code class="descname">div_round_up</code><span class="sig-paren">(</span><em>a</em>, <em>b</em><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/testing/synthetic_pipeline.html#div_round_up"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#apache_beam.testing.synthetic_pipeline.div_round_up" title="Permalink to this definition">¶</a></dt>
 <dd><p>Return ceil(a/b).</p>
 </dd></dl>

 <dl class="function">
 <dt id="apache_beam.testing.synthetic_pipeline.rotate_key">
 <code class="descclassname">apache_beam.testing.synthetic_pipeline.</code><code class="descname">rotate_key</code><span class="sig-paren">(</span><em>element</em><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/testing/synthetic_pipeline.html#rotate_key"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#apache_beam.testing.synthetic_pipeline.rotate_key" title="Permalink to this definition">¶</a></dt>
 <dd><p>Returns a new key-value pair of the same size but with a different key.</p>
 </dd></dl>

 <dl class="class">
 <dt id="apache_beam.testing.synthetic_pipeline.SyntheticStep">
 <em class="property">class </em><code class="descclassname">apache_beam.testing.synthetic_pipeline.</code><code class="descname">SyntheticStep</code><span class="sig-paren">(</span><em>per_element_delay_sec=0</em>, <em>per_bundle_delay_sec=0</em>, <em>output_records_per_input_record=1</em>, <em>output_filter_ratio=0</em><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/testing/synthetic_pipeline.html#SyntheticStep"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#apache_beam.testing.synthetic_pipeline.SyntheticStep" title="Permalink to this definition">¶</a></dt>
 <dd><p>Bases: <a class="reference internal" href="apache_beam.transforms.core.html#apache_beam.transforms.core.DoFn" title="apache_beam.transforms.core.DoFn"><code class="xref py py-class docutils literal"><span class="pre">apache_beam.transforms.core.DoFn</span></code></a></p>
 <p>A DoFn of which behavior can be controlled through prespecified parameters.</p>
 <dl class="method">
 <dt id="apache_beam.testing.synthetic_pipeline.SyntheticStep.start_bundle">
 <code class="descname">start_bundle</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/testing/synthetic_pipeline.html#SyntheticStep.start_bundle"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#apache_beam.testing.synthetic_pipeline.SyntheticStep.start_bundle" title="Permalink to this definition">¶</a></dt>
 <dd></dd></dl>

 <dl class="method">
 <dt id="apache_beam.testing.synthetic_pipeline.SyntheticStep.finish_bundle">
 <code class="descname">finish_bundle</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/testing/synthetic_pipeline.html#SyntheticStep.finish_bundle"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#apache_beam.testing.synthetic_pipeline.SyntheticStep.finish_bundle" title="Permalink to this definition">¶</a></dt>
 <dd></dd></dl>

 <dl class="method">
 <dt id="apache_beam.testing.synthetic_pipeline.SyntheticStep.process">
 <code class="descname">process</code><span class="sig-paren">(</span><em>element</em><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/testing/synthetic_pipeline.html#SyntheticStep.process"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#apache_beam.testing.synthetic_pipeline.SyntheticStep.process" title="Permalink to this definition">¶</a></dt>
 <dd></dd></dl>

 </dd></dl>

 <dl class="class">
 <dt id="apache_beam.testing.synthetic_pipeline.SyntheticSource">
 <em class="property">class </em><code class="descclassname">apache_beam.testing.synthetic_pipeline.</code><code class="descname">SyntheticSource</code><span class="sig-paren">(</span><em>input_spec</em><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/testing/synthetic_pipeline.html#SyntheticSource"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#apache_beam.testing.synthetic_pipeline.SyntheticSource" title="Permalink to this definition">¶</a></dt>
 <dd><p>Bases: <a class="reference internal" href="apache_beam.io.iobase.html#apache_beam.io.iobase.BoundedSource" title="apache_beam.io.iobase.BoundedSource"><code class="xref py py-class docutils literal"><span class="pre">apache_beam.io.iobase.BoundedSource</span></code></a></p>
 <p>A custom source of a specified size.</p>
 <p>Initiates a synthetic source.</p>
 <table class="docutils field-list" frame="void" rules="none">
 <col class="field-name" />
 <col class="field-body" />
 <tbody valign="top">
 <tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><strong>input_spec</strong> – Input specification of the source. See corresponding option in
 function ‘parse_args()’ below for more details.</td>
 </tr>
 <tr class="field-even field"><th class="field-name">Raises:</th><td class="field-body"><code class="xref py py-exc docutils literal"><span class="pre">ValueError</span></code> – if input parameters are invalid.</td>
 </tr>
 </tbody>
 </table>
 <dl class="attribute">
 <dt id="apache_beam.testing.synthetic_pipeline.SyntheticSource.element_size">
 <code class="descname">element_size</code><a class="headerlink" href="#apache_beam.testing.synthetic_pipeline.SyntheticSource.element_size" title="Permalink to this definition">¶</a></dt>
 <dd></dd></dl>

 <dl class="method">
 <dt id="apache_beam.testing.synthetic_pipeline.SyntheticSource.estimate_size">
 <code class="descname">estimate_size</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/testing/synthetic_pipeline.html#SyntheticSource.estimate_size"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#apache_beam.testing.synthetic_pipeline.SyntheticSource.estimate_size" title="Permalink to this definition">¶</a></dt>
 <dd></dd></dl>

 <dl class="method">
 <dt id="apache_beam.testing.synthetic_pipeline.SyntheticSource.split">
 <code class="descname">split</code><span class="sig-paren">(</span><em>desired_bundle_size</em>, <em>start_position=0</em>, <em>stop_position=None</em><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/testing/synthetic_pipeline.html#SyntheticSource.split"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#apache_beam.testing.synthetic_pipeline.SyntheticSource.split" title="Permalink to this definition">¶</a></dt>
 <dd></dd></dl>

 <dl class="method">
 <dt id="apache_beam.testing.synthetic_pipeline.SyntheticSource.get_range_tracker">
 <code class="descname">get_range_tracker</code><span class="sig-paren">(</span><em>start_position</em>, <em>stop_position</em><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/testing/synthetic_pipeline.html#SyntheticSource.get_range_tracker"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#apache_beam.testing.synthetic_pipeline.SyntheticSource.get_range_tracker" title="Permalink to this definition">¶</a></dt>
 <dd></dd></dl>

 <dl class="method">
 <dt id="apache_beam.testing.synthetic_pipeline.SyntheticSource.read">
 <code class="descname">read</code><span class="sig-paren">(</span><em>range_tracker</em><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/testing/synthetic_pipeline.html#SyntheticSource.read"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#apache_beam.testing.synthetic_pipeline.SyntheticSource.read" title="Permalink to this definition">¶</a></dt>
 <dd></dd></dl>

 <dl class="method">
 <dt id="apache_beam.testing.synthetic_pipeline.SyntheticSource.default_output_coder">
 <code class="descname">default_output_coder</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/testing/synthetic_pipeline.html#SyntheticSource.default_output_coder"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#apache_beam.testing.synthetic_pipeline.SyntheticSource.default_output_coder" title="Permalink to this definition">¶</a></dt>
 <dd></dd></dl>

 </dd></dl>

 <dl class="class">
 <dt id="apache_beam.testing.synthetic_pipeline.ShuffleBarrier">
 <em class="property">class </em><code class="descclassname">apache_beam.testing.synthetic_pipeline.</code><code class="descname">ShuffleBarrier</code><span class="sig-paren">(</span><em>label=None</em><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/testing/synthetic_pipeline.html#ShuffleBarrier"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#apache_beam.testing.synthetic_pipeline.ShuffleBarrier" title="Permalink to this definition">¶</a></dt>
 <dd><p>Bases: <a class="reference internal" href="apache_beam.transforms.ptransform.html#apache_beam.transforms.ptransform.PTransform" title="apache_beam.transforms.ptransform.PTransform"><code class="xref py py-class docutils literal"><span class="pre">apache_beam.transforms.ptransform.PTransform</span></code></a></p>
 <dl class="method">
 <dt id="apache_beam.testing.synthetic_pipeline.ShuffleBarrier.expand">
 <code class="descname">expand</code><span class="sig-paren">(</span><em>pc</em><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/testing/synthetic_pipeline.html#ShuffleBarrier.expand"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#apache_beam.testing.synthetic_pipeline.ShuffleBarrier.expand" title="Permalink to this definition">¶</a></dt>
 <dd></dd></dl>

 </dd></dl>

 <dl class="class">
 <dt id="apache_beam.testing.synthetic_pipeline.SideInputBarrier">
 <em class="property">class </em><code class="descclassname">apache_beam.testing.synthetic_pipeline.</code><code class="descname">SideInputBarrier</code><span class="sig-paren">(</span><em>label=None</em><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/testing/synthetic_pipeline.html#SideInputBarrier"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#apache_beam.testing.synthetic_pipeline.SideInputBarrier" title="Permalink to this definition">¶</a></dt>
 <dd><p>Bases: <a class="reference internal" href="apache_beam.transforms.ptransform.html#apache_beam.transforms.ptransform.PTransform" title="apache_beam.transforms.ptransform.PTransform"><code class="xref py py-class docutils literal"><span class="pre">apache_beam.transforms.ptransform.PTransform</span></code></a></p>
 <dl class="method">
 <dt id="apache_beam.testing.synthetic_pipeline.SideInputBarrier.expand">
 <code class="descname">expand</code><span class="sig-paren">(</span><em>pc</em><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/testing/synthetic_pipeline.html#SideInputBarrier.expand"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#apache_beam.testing.synthetic_pipeline.SideInputBarrier.expand" title="Permalink to this definition">¶</a></dt>
 <dd></dd></dl>

 </dd></dl>

 <dl class="function">
 <dt id="apache_beam.testing.synthetic_pipeline.merge_using_gbk">
 <code class="descclassname">apache_beam.testing.synthetic_pipeline.</code><code class="descname">merge_using_gbk</code><span class="sig-paren">(</span><em>name</em>, <em>pc1</em>, <em>pc2</em><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/testing/synthetic_pipeline.html#merge_using_gbk"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#apache_beam.testing.synthetic_pipeline.merge_using_gbk" title="Permalink to this definition">¶</a></dt>
 <dd><p>Merges two given PCollections using a CoGroupByKey.</p>
 </dd></dl>

 <dl class="function">
 <dt id="apache_beam.testing.synthetic_pipeline.merge_using_side_input">
 <code class="descclassname">apache_beam.testing.synthetic_pipeline.</code><code class="descname">merge_using_side_input</code><span class="sig-paren">(</span><em>name</em>, <em>pc1</em>, <em>pc2</em><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/testing/synthetic_pipeline.html#merge_using_side_input"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#apache_beam.testing.synthetic_pipeline.merge_using_side_input" title="Permalink to this definition">¶</a></dt>
 <dd><p>Merges two given PCollections using side inputs.</p>
 </dd></dl>

 <dl class="function">
 <dt id="apache_beam.testing.synthetic_pipeline.expand_using_gbk">
 <code class="descclassname">apache_beam.testing.synthetic_pipeline.</code><code class="descname">expand_using_gbk</code><span class="sig-paren">(</span><em>name</em>, <em>pc</em><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/testing/synthetic_pipeline.html#expand_using_gbk"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#apache_beam.testing.synthetic_pipeline.expand_using_gbk" title="Permalink to this definition">¶</a></dt>
 <dd><p>Expands a given PCollection into two copies using GroupByKey.</p>
 </dd></dl>

 <dl class="function">
 <dt id="apache_beam.testing.synthetic_pipeline.expand_using_second_output">
 <code class="descclassname">apache_beam.testing.synthetic_pipeline.</code><code class="descname">expand_using_second_output</code><span class="sig-paren">(</span><em>name</em>, <em>pc</em><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/testing/synthetic_pipeline.html#expand_using_second_output"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#apache_beam.testing.synthetic_pipeline.expand_using_second_output" title="Permalink to this definition">¶</a></dt>
 <dd><p>Expands a given PCollection into two copies using side outputs.</p>
 </dd></dl>

 <dl class="function">
 <dt id="apache_beam.testing.synthetic_pipeline.parse_args">
 <code class="descclassname">apache_beam.testing.synthetic_pipeline.</code><code class="descname">parse_args</code><span class="sig-paren">(</span><em>args</em><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/testing/synthetic_pipeline.html#parse_args"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#apache_beam.testing.synthetic_pipeline.parse_args" title="Permalink to this definition">¶</a></dt>
 <dd><p>Parses a given set of arguments.</p>
 <table class="docutils field-list" frame="void" rules="none">
 <col class="field-name" />
 <col class="field-body" />
 <tbody valign="top">
 <tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><strong>args</strong> – set of arguments to be passed.</td>
 </tr>
 <tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body">a tuple where first item gives the set of arguments defined and parsed
 within this method and second item gives the set of unknown arguments.</td>
 </tr>
 </tbody>
 </table>
 </dd></dl>

 <dl class="function">
 <dt id="apache_beam.testing.synthetic_pipeline.run">
 <code class="descclassname">apache_beam.testing.synthetic_pipeline.</code><code class="descname">run</code><span class="sig-paren">(</span><em>argv=None</em><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/testing/synthetic_pipeline.html#run"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#apache_beam.testing.synthetic_pipeline.run" title="Permalink to this definition">¶</a></dt>
 <dd><p>Runs the workflow.</p>
 </dd></dl>

 </div>


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