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| <section id="module-apache_beam.io.components.adaptive_throttler"> |
| <span id="apache-beam-io-components-adaptive-throttler-module"></span><h1>apache_beam.io.components.adaptive_throttler module<a class="headerlink" href="#module-apache_beam.io.components.adaptive_throttler" title="Link to this heading"></a></h1> |
| <dl class="py class"> |
| <dt class="sig sig-object py" id="apache_beam.io.components.adaptive_throttler.AdaptiveThrottler"> |
| <em class="property"><span class="pre">class</span><span class="w"> </span></em><span class="sig-prename descclassname"><span class="pre">apache_beam.io.components.adaptive_throttler.</span></span><span class="sig-name descname"><span class="pre">AdaptiveThrottler</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">window_ms</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">bucket_ms</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">overload_ratio</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/io/components/adaptive_throttler.html#AdaptiveThrottler"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#apache_beam.io.components.adaptive_throttler.AdaptiveThrottler" title="Link to this definition"></a></dt> |
| <dd><p>Bases: <a class="reference external" href="https://docs.python.org/3/library/functions.html#object" title="(in Python v3.13)"><code class="xref py py-class docutils literal notranslate"><span class="pre">object</span></code></a></p> |
| <p>Implements adaptive throttling.</p> |
| <p>See |
| <a class="reference external" href="https://landing.google.com/sre/book/chapters/handling-overload.html#client-side-throttling-a7sYUg">https://landing.google.com/sre/book/chapters/handling-overload.html#client-side-throttling-a7sYUg</a> |
| for a full discussion of the use case and algorithm applied.</p> |
| <p>Initializes AdaptiveThrottler.</p> |
| <dl class="field-list simple"> |
| <dt class="field-odd">Parameters<span class="colon">:</span></dt> |
| <dd class="field-odd"><ul class="simple"> |
| <li><p><strong>window_ms</strong> – int, length of history to consider, in ms, to set |
| throttling.</p></li> |
| <li><p><strong>bucket_ms</strong> – int, granularity of time buckets that we store data in, in |
| ms.</p></li> |
| <li><p><strong>overload_ratio</strong> – float, the target ratio between requests sent and |
| successful requests. This is “K” in the formula in |
| <a class="reference external" href="https://landing.google.com/sre/book/chapters/handling-overload.html">https://landing.google.com/sre/book/chapters/handling-overload.html</a>.</p></li> |
| </ul> |
| </dd> |
| </dl> |
| <dl class="py attribute"> |
| <dt class="sig sig-object py" id="apache_beam.io.components.adaptive_throttler.AdaptiveThrottler.MIN_REQUESTS"> |
| <span class="sig-name descname"><span class="pre">MIN_REQUESTS</span></span><em class="property"><span class="w"> </span><span class="p"><span class="pre">=</span></span><span class="w"> </span><span class="pre">1</span></em><a class="headerlink" href="#apache_beam.io.components.adaptive_throttler.AdaptiveThrottler.MIN_REQUESTS" title="Link to this definition"></a></dt> |
| <dd></dd></dl> |
| |
| <dl class="py method"> |
| <dt class="sig sig-object py" id="apache_beam.io.components.adaptive_throttler.AdaptiveThrottler.throttle_request"> |
| <span class="sig-name descname"><span class="pre">throttle_request</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">now</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/io/components/adaptive_throttler.html#AdaptiveThrottler.throttle_request"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#apache_beam.io.components.adaptive_throttler.AdaptiveThrottler.throttle_request" title="Link to this definition"></a></dt> |
| <dd><p>Determines whether one RPC attempt should be throttled.</p> |
| <p>This should be called once each time the caller intends to send an RPC; if |
| it returns true, drop or delay that request (calling this function again |
| after the delay).</p> |
| <dl class="field-list simple"> |
| <dt class="field-odd">Parameters<span class="colon">:</span></dt> |
| <dd class="field-odd"><p><strong>now</strong> – int, time in ms since the epoch</p> |
| </dd> |
| <dt class="field-even">Returns<span class="colon">:</span></dt> |
| <dd class="field-even"><p>bool, True if the caller should throttle or delay the request.</p> |
| </dd> |
| </dl> |
| </dd></dl> |
| |
| <dl class="py method"> |
| <dt class="sig sig-object py" id="apache_beam.io.components.adaptive_throttler.AdaptiveThrottler.successful_request"> |
| <span class="sig-name descname"><span class="pre">successful_request</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">now</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/io/components/adaptive_throttler.html#AdaptiveThrottler.successful_request"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#apache_beam.io.components.adaptive_throttler.AdaptiveThrottler.successful_request" title="Link to this definition"></a></dt> |
| <dd><p>Notifies the throttler of a successful request.</p> |
| <p>Must be called once for each request (for which throttle_request was |
| previously called) that succeeded.</p> |
| <dl class="field-list simple"> |
| <dt class="field-odd">Parameters<span class="colon">:</span></dt> |
| <dd class="field-odd"><p><strong>now</strong> – int, time in ms since the epoch</p> |
| </dd> |
| </dl> |
| </dd></dl> |
| |
| </dd></dl> |
| |
| </section> |
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