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Posted to issues@beam.apache.org by "Reuven Lax (JIRA)" <ji...@apache.org> on 2019/03/19 00:20:00 UTC

[jira] [Commented] (BEAM-6856) Support dynamic MapState on Dataflow

    [ https://issues.apache.org/jira/browse/BEAM-6856?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16795509#comment-16795509 ] 

Reuven Lax commented on BEAM-6856:
----------------------------------

Beam's state API supports MapState, a way of storing a tag-value map in the state for a given key. Currently the entire map for a given key must be stored in memory (unlike BagState which is paginated from our service). The goal is to support out-of-memory MapState that supports fetching individual keys or paginated iteration over the map.

Note: this depends on the Dataflow service delivering two new pieces of functionality, which will be a prerequisite for the Beam API work.

> Support dynamic MapState on Dataflow
> ------------------------------------
>
>                 Key: BEAM-6856
>                 URL: https://issues.apache.org/jira/browse/BEAM-6856
>             Project: Beam
>          Issue Type: Bug
>          Components: runner-dataflow
>            Reporter: Reuven Lax
>            Priority: Major
>




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