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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLINK-9637) Add public user documentation for TTL feature
Date Mon, 30 Jul 2018 08:09:00 GMT

    [ https://issues.apache.org/jira/browse/FLINK-9637?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16561604#comment-16561604

ASF GitHub Bot commented on FLINK-9637:

StefanRRichter commented on a change in pull request #6379: [FLINK-9637] Add public user documentation
for state TTL feature
URL: https://github.com/apache/flink/pull/6379#discussion_r206044982

 File path: docs/dev/stream/state/state.md
 @@ -266,6 +266,92 @@ a `ValueState`. Once the count reaches 2 it will emit the average and
clear the
 we start over from `0`. Note that this would keep a different state value for each different
 key if we had tuples with different values in the first field.
+### State time-to-live (TTL)
+A time-to-live (TTL) can be assigned to the keyed state value. 
+In this case it will expire after the configured TTL
+and its stored value will be cleaned up based on the best effort.
 Review comment:
   I was expecting some additional info about what "best effort" means here, but it came a
bit later. Maybe we should say that this is discussed in more detail later. I think it might
also make sense to name some use cases that are currently supported (and some that are not/will
be in the future) to make things a bit more concrete for users.

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> Add public user documentation for TTL feature
> ---------------------------------------------
>                 Key: FLINK-9637
>                 URL: https://issues.apache.org/jira/browse/FLINK-9637
>             Project: Flink
>          Issue Type: Sub-task
>          Components: State Backends, Checkpointing
>    Affects Versions: 1.6.0
>            Reporter: Andrey Zagrebin
>            Assignee: Andrey Zagrebin
>            Priority: Major
>              Labels: pull-request-available
>             Fix For: 1.6.0

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