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<script>function showSearch(){addPlaceholder();var e,t=document.querySelector(".searchBar");t.classList.remove("disappear"),e=document.querySelector("#iconsBar"),e.classList.add("disappear")}function addPlaceholder(){$("input:text").attr("placeholder","What are you looking for?")}function endSearch(){var e,t=document.querySelector(".searchBar");t.classList.add("disappear"),e=document.querySelector("#iconsBar"),e.classList.remove("disappear")}function blockScroll(){$("body").toggleClass("fixedPosition")}function openMenu(){addPlaceholder(),blockScroll()}</script><div class="clearfix container-main-content"><div class="section-nav closed" data-offset-top=90 data-offset-bottom=500><span class="section-nav-back glyphicon glyphicon-menu-left"></span><nav><ul class=section-nav-list data-section-nav><li><span class=section-nav-list-main-title>Runners</span></li><li><a href=/documentation/runners/capability-matrix/>Capability Matrix</a></li><li><a href=/documentation/runners/direct/>Direct Runner</a></li><li><a href=/documentation/runners/flink/>Apache Flink</a></li><li><a href=/documentation/runners/nemo/>Apache Nemo</a></li><li><a href=/documentation/runners/samza/>Apache Samza</a></li><li><a href=/documentation/runners/spark/>Apache Spark</a></li><li><a href=/documentation/runners/dataflow/>Google Cloud Dataflow</a></li><li><a href=/documentation/runners/jet/>Hazelcast Jet</a></li><li><a href=/documentation/runners/twister2/>Twister2</a></li></ul></nav></div><nav class="page-nav clearfix" data-offset-top=90 data-offset-bottom=500><nav id=TableOfContents></nav></nav><div class="body__contained body__section-nav arrow-list arrow-list--no-mt"><h1 id=beam-capability-matrix>Beam Capability Matrix</h1><p>Apache Beam provides a portable API layer for building sophisticated data-parallel processing pipelines that may be executed across a diversity of execution engines, or <i>runners</i>. The core concepts of this layer are based upon the Beam Model (formerly referred to as the <a href=https://www.vldb.org/pvldb/vol8/p1792-Akidau.pdf>Dataflow Model</a>), and implemented to varying degrees in each Beam runner. To help clarify the capabilities of individual runners, we&rsquo;ve created the capability matrix below.</p><p>Individual capabilities have been grouped by their corresponding What / Where / When / How question:</p><ul><li>What results are being calculated?</li><li>Where in event time?</li><li>When in processing time?</li><li>How do refinements of results relate?</li></ul><p>For more details on the What / Where / When / How breakdown of concepts, we recommend reading through the <a href=https://oreilly.com/ideas/the-world-beyond-batch-streaming-102>Streaming 102</a> post on O&rsquo;Reilly Radar.</p><p>Note that in the future, we intend to add additional tables beyond the current set, for things like runtime characteristics (e.g. at-least-once vs exactly-once), performance, etc.</p><div class=information-container><div><h5>How to read the tables</h5><table class=read-tables><tr><th></th><th class=border-left>Tools we are comparing</th></tr><tr class=border-top><td class=border-right>Properties</td><td style="border-left:3px solid #ff6d05">Does this tool have this property?<span>Yes/Partially/No/Unverified</span></td></tr></table></div><div class=second-container><h5>What do those signs mean?</h5><div class=row><div class="box white">&#x2713;</div><div>Yes</div></div><div class=row><div class="box partial">~</div><div>Partially</div></div><div class=row><div class="box partial">?</div><div>Unverified</div></div><div class=row><div class="box gray">&#x2715;</div><div>No</div></div></div></div><h4>What is being computed?</h4><div class=table-container><div class=table-left><table><tr><th></th></tr><tr><th>ParDo</th></tr><tr><th>GroupByKey</th></tr><tr><th>Flatten</th></tr><tr><th>Combine</th></tr><tr><th>Composite Transforms</th></tr><tr><th>Side Inputs</th></tr><tr><th>Source API</th></tr><tr><th>Metrics</th></tr><tr><th>Stateful Processing</th></tr></table></div><div class=table-right><div id=what-is-being-computed class=table-headers><table><tr><th>Google Cloud Dataflow</th><th>Apache Flink</th><th>Apache Spark (RDD/DStream based)</th><th>Apache Spark Structured Streaming (Dataset based)</th><th>Apache Samza</th><th>Apache Nemo</th><th>Hazelcast Jet</th><th>Twister2</th><th>Python Direct FnRunner</th><th>Go Direct Runner</th></tr></table></div><div id=what-is-being-computed class=table-center><table><tr><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#f9f9f9;border-color:#d8d8d8><center><b>~</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td></tr><tr><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#f9f9f9;border-color:#d8d8d8><center><b>~</b></center></td><td style=background-color:#f9f9f9;border-color:#d8d8d8><center><b>~</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td></tr><tr><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#f9f9f9;border-color:#d8d8d8><center><b>~</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td></tr><tr><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#f9f9f9;border-color:#d8d8d8><center><b>~</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td></tr><tr><td style=background-color:#f9f9f9;border-color:#d8d8d8><center><b>~</b></center></td><td style=background-color:#f9f9f9;border-color:#d8d8d8><center><b>~</b></center></td><td style=background-color:#f9f9f9;border-color:#d8d8d8><center><b>~</b></center></td><td style=background-color:#f9f9f9;border-color:#d8d8d8><center><b>~</b></center></td><td style=background-color:#f9f9f9;border-color:#d8d8d8><center><b>~</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#f9f9f9;border-color:#d8d8d8><center><b>~</b></center></td><td style=background-color:#f9f9f9;border-color:#d8d8d8><center><b>~</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td></tr><tr><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#f9f9f9;border-color:#d8d8d8><center><b>~</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#f9f9f9;border-color:#d8d8d8><center><b>~</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td></tr><tr><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#f9f9f9;border-color:#d8d8d8><center><b>~</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td></tr><tr><td style=background-color:#f9f9f9;border-color:#d8d8d8><center><b>~</b></center></td><td style=background-color:#f9f9f9;border-color:#d8d8d8><center><b>~</b></center></td><td style=background-color:#f9f9f9;border-color:#d8d8d8><center><b>~</b></center></td><td style=background-color:#f9f9f9;border-color:#d8d8d8><center><b>~</b></center></td><td style=background-color:#f9f9f9;border-color:#d8d8d8><center><b>~</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td><td style=background-color:#f9f9f9;border-color:#d8d8d8><center><b>~</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td></tr><tr><td style=background-color:#f9f9f9;border-color:#d8d8d8><center><b>~</b></center></td><td style=background-color:#f9f9f9;border-color:#d8d8d8><center><b>~</b></center></td><td style=background-color:#f9f9f9;border-color:#d8d8d8><center><b>~</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td><td style=background-color:#f9f9f9;border-color:#d8d8d8><center><b>~</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td><td style=background-color:#f9f9f9;border-color:#d8d8d8><center><b>~</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td></tr></table></div></div></div><a id=table-link href=/documentation/runners/capability-matrix/what-is-being-computed/>SEE DETAILS AND FULL VERSION HERE.</a><h4>Bounded Splittable DoFn Support Status</h4><div class=table-container><div class=table-left><table><tr><th></th></tr><tr><th>Base</th></tr><tr><th>Side Inputs</th></tr><tr><th>Splittable DoFn Initiated Checkpointing</th></tr><tr><th>Dynamic Splitting</th></tr><tr><th>Bundle Finalization</th></tr></table></div><div class=table-right><div id=bounded-splittable-dofn-support-status class=table-headers><table><tr><th>Google Cloud Dataflow</th><th>Apache Flink</th><th>Apache Spark (RDD/DStream based)</th><th>Apache Spark Structured Streaming (Dataset based)</th><th>Apache Samza</th><th>Apache Nemo</th><th>Hazelcast Jet</th><th>Twister2</th><th>Python Direct FnRunner</th><th>Go Direct Runner</th></tr></table></div><div id=bounded-splittable-dofn-support-status class=table-center><table><tr><td style=background-color:#f9f9f9;border-color:#d8d8d8><center><b>~</b></center></td><td style=background-color:#f9f9f9;border-color:#d8d8d8><center><b>~</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td></tr><tr><td style=background-color:#f9f9f9;border-color:#d8d8d8><center><b>~</b></center></td><td style=background-color:#f9f9f9;border-color:#d8d8d8><center><b>~</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td></tr><tr><td style=background-color:#f9f9f9;border-color:#d8d8d8><center><b>~</b></center></td><td style=background-color:#f9f9f9;border-color:#d8d8d8><center><b>~</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td></tr><tr><td style=background-color:#f9f9f9;border-color:#d8d8d8><center><b>~</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td></tr><tr><td style=background-color:#f9f9f9;border-color:#d8d8d8><center><b>~</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td></tr></table></div></div></div><a id=table-link href=/documentation/runners/capability-matrix/bounded-splittable-dofn-support-status/>SEE DETAILS AND FULL VERSION HERE.</a><h4>Unbounded Splittable DoFn Support Status</h4><div class=table-container><div class=table-left><table><tr><th></th></tr><tr><th>Base</th></tr><tr><th>Side Inputs</th></tr><tr><th>Splittable DoFn Initiated Checkpointing</th></tr><tr><th>Dynamic Splitting</th></tr><tr><th>Bundle Finalization</th></tr></table></div><div class=table-right><div id=unbounded-splittable-dofn-support-status class=table-headers><table><tr><th>Google Cloud Dataflow</th><th>Apache Flink</th><th>Apache Spark (RDD/DStream based)</th><th>Apache Spark Structured Streaming (Dataset based)</th><th>Apache Samza</th><th>Apache Nemo</th><th>Hazelcast Jet</th><th>Twister2</th><th>Python Direct FnRunner</th><th>Go Direct Runner</th></tr></table></div><div id=unbounded-splittable-dofn-support-status class=table-center><table><tr><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#f9f9f9;border-color:#d8d8d8><center><b>~</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td></tr><tr><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td></tr><tr><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#f9f9f9;border-color:#d8d8d8><center><b>~</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td></tr><tr><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td></tr><tr><td style=background-color:#f9f9f9;border-color:#d8d8d8><center><b>~</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td></tr></table></div></div></div><a id=table-link href=/documentation/runners/capability-matrix/unbounded-splittable-dofn-support-status/>SEE DETAILS AND FULL VERSION HERE.</a><h4>Where in event time?</h4><div class=table-container><div class=table-left><table><tr><th></th></tr><tr><th>Global windows</th></tr><tr><th>Fixed windows</th></tr><tr><th>Sliding windows</th></tr><tr><th>Session windows</th></tr><tr><th>Custom windows</th></tr><tr><th>Custom merging windows</th></tr><tr><th>Timestamp control</th></tr></table></div><div class=table-right><div id=where-in-event-time class=table-headers><table><tr><th>Google Cloud Dataflow</th><th>Apache Flink</th><th>Apache Spark (RDD/DStream based)</th><th>Apache Spark Structured Streaming (Dataset based)</th><th>Apache Samza</th><th>Apache Nemo</th><th>Hazelcast Jet</th><th>Twister2</th><th>Python Direct FnRunner</th><th>Go Direct Runner</th></tr></table></div><div id=where-in-event-time class=table-center><table><tr><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#f9f9f9;border-color:#d8d8d8><center><b>~</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td></tr><tr><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#f9f9f9;border-color:#d8d8d8><center><b>~</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td></tr><tr><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#f9f9f9;border-color:#d8d8d8><center><b>~</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td></tr><tr><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#f9f9f9;border-color:#d8d8d8><center><b>~</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td></tr><tr><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#f9f9f9;border-color:#d8d8d8><center><b>~</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td></tr><tr><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#f9f9f9;border-color:#d8d8d8><center><b>~</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td></tr><tr><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#f9f9f9;border-color:#d8d8d8><center><b>~</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td></tr></table></div></div></div><a id=table-link href=/documentation/runners/capability-matrix/where-in-event-time/>SEE DETAILS AND FULL VERSION HERE.</a><h4>When in processing time?</h4><div class=table-container><div class=table-left><table><tr><th></th></tr><tr><th>Configurable triggering</th></tr><tr><th>Event-time triggers</th></tr><tr><th>Processing-time triggers</th></tr><tr><th>Count triggers</th></tr><tr><th>Composite triggers</th></tr><tr><th>Allowed lateness</th></tr><tr><th>Timers</th></tr></table></div><div class=table-right><div id=when-in-processing-time class=table-headers><table><tr><th>Google Cloud Dataflow</th><th>Apache Flink</th><th>Apache Spark (RDD/DStream based)</th><th>Apache Spark Structured Streaming (Dataset based)</th><th>Apache Samza</th><th>Apache Nemo</th><th>Hazelcast Jet</th><th>Twister2</th><th>Python Direct FnRunner</th><th>Go Direct Runner</th></tr></table></div><div id=when-in-processing-time class=table-center><table><tr><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#f9f9f9;border-color:#d8d8d8><center><b>~</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td></tr><tr><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#f9f9f9;border-color:#d8d8d8><center><b>~</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td></tr><tr><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#f9f9f9;border-color:#d8d8d8><center><b>~</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td></tr><tr><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#f9f9f9;border-color:#d8d8d8><center><b>~</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td></tr><tr><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#f9f9f9;border-color:#d8d8d8><center><b>~</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#f9f9f9;border-color:#d8d8d8><center><b>~</b></center></td></tr><tr><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#f9f9f9;border-color:#d8d8d8><center><b>~</b></center></td></tr><tr><td style=background-color:#f9f9f9;border-color:#d8d8d8><center><b>~</b></center></td><td style=background-color:#f9f9f9;border-color:#d8d8d8><center><b>~</b></center></td><td style=background-color:#f9f9f9;border-color:#d8d8d8><center><b>~</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td><td style=background-color:#f9f9f9;border-color:#d8d8d8><center><b>~</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td><td style=background-color:#f9f9f9;border-color:#d8d8d8><center><b>~</b></center></td><td style=background-color:#f9f9f9;border-color:#d8d8d8><center><b>~</b></center></td></tr></table></div></div></div><a id=table-link href=/documentation/runners/capability-matrix/when-in-processing-time/>SEE DETAILS AND FULL VERSION HERE.</a><h4>How do refinements relate?</h4><div class=table-container><div class=table-left><table><tr><th></th></tr><tr><th>Discarding</th></tr><tr><th>Accumulating</th></tr></table></div><div class=table-right><div id=how-do-refinements-relate class=table-headers><table><tr><th>Google Cloud Dataflow</th><th>Apache Flink</th><th>Apache Spark (RDD/DStream based)</th><th>Apache Spark Structured Streaming (Dataset based)</th><th>Apache Samza</th><th>Apache Nemo</th><th>Hazelcast Jet</th><th>Twister2</th><th>Python Direct FnRunner</th><th>Go Direct Runner</th></tr></table></div><div id=how-do-refinements-relate class=table-center><table><tr><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#f9f9f9;border-color:#d8d8d8><center><b>~</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td></tr><tr><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td><td style=background-color:#fff;border-color:#f6f6f6><center><b>&#x2713;</b></center></td></tr></table></div></div></div><a id=table-link href=/documentation/runners/capability-matrix/how-do-refinements-relate/>SEE DETAILS AND FULL VERSION HERE.</a><h4>Additional common features not yet part of the Beam model</h4><div class=table-container><div class=table-left><table><tr><th></th></tr><tr><th>Drain</th></tr><tr><th>Checkpoint</th></tr><tr><th>Key-ordered delivery</th></tr></table></div><div class=table-right><div id=additional-common-features-not-yet-part-of-the-beam-model class=table-headers><table><tr><th>Google Cloud Dataflow</th><th>Apache Flink</th><th>Apache Spark (RDD/DStream based)</th><th>Apache Spark Structured Streaming (Dataset based)</th><th>Apache Samza</th><th>Apache Nemo</th><th>Hazelcast Jet</th><th>Twister2</th><th>Python Direct FnRunner</th><th>Go Direct Runner</th></tr></table></div><div id=additional-common-features-not-yet-part-of-the-beam-model class=table-center><table><tr><td style=background-color:#f9f9f9;border-color:#d8d8d8><center><b>~</b></center></td><td style=background-color:#f9f9f9;border-color:#d8d8d8><center><b>~</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td></tr><tr><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td><td style=background-color:#f9f9f9;border-color:#d8d8d8><center><b>~</b></center></td><td style=background-color:#f9f9f9;border-color:#d8d8d8><center><b>~</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td><td style=background-color:#f9f9f9;border-color:#d8d8d8><center><b>~</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>&#x2715;</b></center></td></tr><tr><td style=background-color:#f9f9f9;border-color:#d8d8d8><center><b>~</b></center></td><td style=background-color:#f9f9f9;border-color:#d8d8d8><center><b>~</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>?</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>?</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>?</b></center></td><td style=background-color:#f9f9f9;border-color:#d8d8d8><center><b>~</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>?</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>?</b></center></td><td style=background-color:#e1e0e0;border-color:#bcbcbc><center><b>?</b></center></td></tr></table></div></div></div><a id=table-link href=/documentation/runners/capability-matrix/additional-common-features-not-yet-part-of-the-beam-model/>SEE DETAILS AND FULL VERSION HERE.</a>
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