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https://issues.apache.org/jira/browse/FLINK-13056?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16909021#comment-16909021
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Till Rohrmann commented on FLINK-13056:
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How exactly would it change the failover region computation? Maybe you could
share some code examples. Maybe we could make it pluggable so that the user can
choose which version she prefers.
> 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: Improvement
> 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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