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Posted to issues@flink.apache.org by "Tzu-Li (Gordon) Tai (JIRA)" <ji...@apache.org> on 2018/06/13 10:32:00 UTC

[jira] [Updated] (FLINK-9574) Add a dedicated documentation page for state evolution

     [ https://issues.apache.org/jira/browse/FLINK-9574?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Tzu-Li (Gordon) Tai updated FLINK-9574:
---------------------------------------
    Issue Type: Sub-task  (was: Improvement)
        Parent: FLINK-9376

> Add a dedicated documentation page for state evolution
> ------------------------------------------------------
>
>                 Key: FLINK-9574
>                 URL: https://issues.apache.org/jira/browse/FLINK-9574
>             Project: Flink
>          Issue Type: Sub-task
>          Components: Documentation, State Backends, Checkpointing, Type Serialization System
>            Reporter: Tzu-Li (Gordon) Tai
>            Assignee: Tzu-Li (Gordon) Tai
>            Priority: Critical
>
> Currently, the only bit of documentation about serializer upgrades / state evolution, is [https://ci.apache.org/projects/flink/flink-docs-release-1.5/dev/stream/state/custom_serialization.html#handling-serializer-upgrades-and-compatibility.], which only explains things at an API level.
> State evolution over the time has proved to be a rather complex topic that is often overlooked by users. Users would probably benefit from a actual full-grown dedicated page that covers both API, and a some necessary internal details regarding the interplay of the outdated serializer, restore serializer, and new registered serializer of states.
> I propose to add this documentation as a subpage under Streaming/State & Fault-Tolerance/.



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