[jira] [Created] (FLINK-18165) When savingpoint is restored, select the checkpoint directory and stateBackend

[Shang Yuanchun (Jira)]

Xinyuan Liu created FLINK-18165:
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             Summary: When savingpoint is restored, select the checkpoint directory and stateBackend
                 Key: FLINK-18165
                 URL: https://issues.apache.org/jira/browse/FLINK-18165
             Project: Flink
          Issue Type: New Feature
    Affects Versions: 1.9.0
         Environment: flink 1.9
            Reporter: Xinyuan Liu


If the checkpoint file is used as the initial state of the savepoint startup, it must be ensured that the state backend used before and after is the same type, but in actual production, there will be more and more state, the taskmanager memory is insufficient and the cluster cannot be expanded, and the state backend needs to be switched at this time. And there is a need to ensure data consistency. Unfortunately, currently flink does not provide an elegant way to switch state backend, can the community consider this proposal



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