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https://issues.apache.org/jira/browse/FLINK-13056?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16908955#comment-16908955
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Chesnay Schepler commented on FLINK-13056:
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I'm removing this as a subtask of FLINK-4256 so we can mark that one as
finished (since it's weird if a FLIP is marked as release but the JIRA still in
progress).
> Optimize region failover performance on calculating vertices to restart
> -----------------------------------------------------------------------
>
> Key: FLINK-13056
> URL: https://issues.apache.org/jira/browse/FLINK-13056
> Project: Flink
> Issue Type: Sub-task
> Components: Runtime / Coordination
> Affects Versions: 1.9.0
> Reporter: Zhu Zhu
> Assignee: Zhu Zhu
> Priority: Major
>
> Currently some region boundary structures are calculated each time of a
> region failover. This calculation can be heavy as its complexity goes up with
> execution edge count.
> We tested it in a sample case with 8000 vertices and 16,000,000 edges. It
> takes ~2.0s to calculate vertices to restart.
> (more details in
> [https://docs.google.com/document/d/197Ou-01h2obvxq8viKqg4FnOnsykOEKxk3r5WrVBPuA/edit?usp=sharing)]
> That's why we'd propose to cache the region boundary structures to improve
> the region failover performance.
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