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From "Andrey Zagrebin (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLINK-9938) State TTL cleanup during full state scan upon checkpointing
Date Wed, 25 Jul 2018 08:03:00 GMT

    [ https://issues.apache.org/jira/browse/FLINK-9938?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16555336#comment-16555336
] 

Andrey Zagrebin commented on FLINK-9938:
----------------------------------------

I think it could be also possible, though would need synchronisation if in background.

This issue is just one of possible strategies for cleanup.

> State TTL cleanup during full state scan upon checkpointing
> -----------------------------------------------------------
>
>                 Key: FLINK-9938
>                 URL: https://issues.apache.org/jira/browse/FLINK-9938
>             Project: Flink
>          Issue Type: Improvement
>          Components: State Backends, Checkpointing
>    Affects Versions: 1.6.0
>            Reporter: Andrey Zagrebin
>            Assignee: Andrey Zagrebin
>            Priority: Major
>             Fix For: 1.6.0
>
>
> We can try to piggyback full state scan during certain checkpoint processes in backends,
check TTL expiration for every entry and evict expired to speed up cleanup.



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