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https://issues.apache.org/jira/browse/SPARK-30441?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Dongjoon Hyun updated SPARK-30441:
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Affects Version/s: (was: 2.4.4)
(was: 2.4.0)
(was: 2.3.0)
(was: 2.1.0)
3.0.0
> Improve the memory usage in StronglyConnectedComponents
> -------------------------------------------------------
>
> Key: SPARK-30441
> URL: https://issues.apache.org/jira/browse/SPARK-30441
> Project: Spark
> Issue Type: Improvement
> Components: GraphX
> Affects Versions: 3.0.0
> Reporter: jiamuzhou
> Priority: Major
> Attachments: figure1.png, figure2.png
>
>
> This is very consume memory when It use StronglyConnectedComponents(see
> figure1.png). Because there is no mark the Graph/RDD as non-persistent in the
> iterative process timely. And it is maybe lead to fail in the big graph.
> In order to improve the memory usage, it is verty important to mark the
> Graph/RDD as non-persistent timely. In the current code, only make the
> Graph/RDD as non-persistent for 'sccGraph' but not for 'sccWorkGraph' in
> degree's step and pregel's step.
> I have done a optimized code proposal(see my
> fork:[https://github.com/jmzhoulab/spark/blob/master/graphx/src/main/scala/org/apache/spark/graphx/lib/StronglyConnectedComponents.scala])
> The storage after optimization see figure2.png
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