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https://issues.apache.org/jira/browse/FLINK-11254?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16732931#comment-16732931
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Tzu-Li (Gordon) Tai edited comment on FLINK-11254 at 1/3/19 11:20 AM:
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Yes, we've discussed on this a bit offline. I'll be willing to shepherd this
effort [~klion26].
Before anything else, to kick this off, it would be best if we can start with a
document that first clarifies the format of each different backend / state
structure.
This is something that is already missing as of the current state - there is
no clear documentation of the serialization formats of state backends.
With this sorted out first, it'll then be easier to discuss towards a draft
solution for the unified format and migration paths, which we can then propose
to the community as a FLIP.
was (Author: tzulitai):
Yes, we've discussed on this a bit offline during Flink Forward. I'll be
willing to shepherd this effort [~klion26].
Before anything else, to kick this off, it would be best if we can start with a
document that first clarifies the format of each different backend / state
structure.
This is something that is already missing as of the current state - there is no
clear documentation of the serialization formats of state backends.
With this sorted out first, it'll then be easier to discuss towards a draft
solution for the unified format and migration paths, which we can then propose
to the community as a FLIP.
> Unify serialization format of savepoint for switching state backends
> --------------------------------------------------------------------
>
> Key: FLINK-11254
> URL: https://issues.apache.org/jira/browse/FLINK-11254
> Project: Flink
> Issue Type: Improvement
> Affects Versions: 1.7.1
> Reporter: Congxian Qiu
> Assignee: Congxian Qiu
> Priority: Major
>
> For the current version, the serialization formats of savepoint between
> HeapKeyedStateBackend and RocksDBStateBackend are different, so we can not
> switch state backend when using savepoint. We should unify the serialization
> formats of the savepoint to support state backend switch.
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