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https://issues.apache.org/jira/browse/FLINK-4814?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16167638#comment-16167638
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Aljoscha Krettek commented on FLINK-4814:
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Yes, those are things I'm aware of and I also find them quite annoying.
> Remove extra storage location for externalized checkpoint metadata
> ------------------------------------------------------------------
>
> Key: FLINK-4814
> URL: https://issues.apache.org/jira/browse/FLINK-4814
> Project: Flink
> Issue Type: Sub-task
> Components: State Backends, Checkpointing
> Reporter: Ufuk Celebi
>
> Follow up for FLINK-4512.
> Store checkpoint meta data in checkpoint directory. That makes it simpler
> for users to track and clean up checkpoints manually, if they want to retain
> externalized checkpoints across cancellations and terminal failures.
> Every state backend needs to be able to provide a storage location for the
> checkpoint metadata. The memory state backend would hence not work with
> externalized checkpoints, unless one sets explicitly a parameter
> `setExternalizedCheckpointsLocation(uri)`.
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