[jira] [Commented] (BEAM-47) UnboundedSource should support dynamic work rebalancing

["Eugene Kirpichov (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/BEAM-47?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15221972#comment-15221972 ] 

Eugene Kirpichov commented on BEAM-47:
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Is this a dupe of BEAM-65?

> UnboundedSource should support dynamic work rebalancing
> -------------------------------------------------------
>
>                 Key: BEAM-47
>                 URL: https://issues.apache.org/jira/browse/BEAM-47
>             Project: Beam
>          Issue Type: New Feature
>          Components: sdk-java-extensions
>            Reporter: Daniel Halperin
>
> BoundedSource has splitAtFraction and related code to enable large work items to be split dynamically and moved to other workers.
> UnboundedSource does not have this support -- instead, runners are expected to allocate many splits initially and rebalance those between workers.
> We should add dynamic work rebalancing to UnboundedSource. This will almost certainly be done by checkpointing the source, and then the dynamically produced splits will both inherit the checkpoint (or a split-adapted version of it).



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