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https://issues.apache.org/jira/browse/FLINK-18165?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17127403#comment-17127403
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Yu Li commented on FLINK-18165:
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ps. to be explicit, once the binary format of savepoint is unified, we could
switch state backend easily through savepoint.
> 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: Improvement
> Affects Versions: 1.9.0
> Environment: flink 1.9
> Reporter: Xinyuan Liu
> Priority: Major
>
> 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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