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Posted to dev@flink.apache.org by "Arvid Heise (Jira)" <ji...@apache.org> on 2020/06/22 08:11:00 UTC

[jira] [Created] (FLINK-18404) Make unaligned checkpoints rescalable

Arvid Heise created FLINK-18404:
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             Summary: Make unaligned checkpoints rescalable
                 Key: FLINK-18404
                 URL: https://issues.apache.org/jira/browse/FLINK-18404
             Project: Flink
          Issue Type: Improvement
          Components: Runtime / Checkpointing
    Affects Versions: 1.12.0
            Reporter: Arvid Heise


Currently, the in-flight data of unaligned checkpoints is not handled properly in rescaling scenarios. We guarded with a fail-safe exception against it. A proper rescaling support would increase the benefits of unaligned checkpoints.

To rescale in-flight data, the state shard needs to be redistributed across all new assigned tasks and some additional filter needs to ensure that only the relevant key-groups are actually recovered (or processed).



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