[jira] [Commented] (BEAM-1659) Improve UnboundedSourceShard structure

["Daniel Halperin (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/BEAM-1659?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15953860#comment-15953860 ] 

Daniel Halperin commented on BEAM-1659:
---------------------------------------

[~tgroh] is this a starter issue?

> Improve UnboundedSourceShard structure
> --------------------------------------
>
>                 Key: BEAM-1659
>                 URL: https://issues.apache.org/jira/browse/BEAM-1659
>             Project: Beam
>          Issue Type: Improvement
>          Components: runner-direct
>            Reporter: Thomas Groh
>            Priority: Minor
>
> Use the 'OneOf' of "Active Reader" and "Optional<Checkpoint>", to make it obvious how to obtain and use a reader.
> Maintain an ordered list of checkpoints that have not been finalized for a shard. Checkpoints that can be resumed from can also be finalized, but otherwise the two are unrelated. This also improves ease of never multi-finalizing a checkpoint. This gets more complicated with retries, but must be considered with the associated work required to make UnboundedReadEvaluatorFactory handle retries properly.



--
This message was sent by Atlassian JIRA
(v6.3.15#6346)