Ufuk Celebi created FLINK-4512:
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Summary: Add option for persistent checkpoints
Key: FLINK-4512
URL: https://issues.apache.org/jira/browse/FLINK-4512
Project: Flink
Issue Type: Sub-task
Components: State Backends, Checkpointing
Reporter: Ufuk Celebi
Allow periodic checkpoints to be persisted by writing out their meta data. This
is what we currently do for savepoints, but in the future checkpoints and
savepoints are likely to diverge with respect to guarantees they give for
updatability, etc.
This means that the difference between persistent checkpoints and savepoints in
the long term will be that persistent checkpoints can only be restored with the
same job settings (like parallelism, etc.)
Regular and persisted checkpoints should behave differently with respect to
disposal in *globally* terminal job states (FINISHED, CANCELLED, FAILED):
regular checkpoints are cleaned up in all of these cases whereas persistent
checkpoints only on FINISHED. Maybe with the option to customize behaviour on
CANCELLED or FAILED.
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