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Posted to commits@beam.apache.org by "Thomas Groh (JIRA)" <ji...@apache.org> on 2017/04/03 18:04:42 UTC

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

     [ https://issues.apache.org/jira/browse/BEAM-1659?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Thomas Groh updated BEAM-1659:
------------------------------
    Labels: starter  (was: )

> 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
>              Labels: starter
>
> 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.



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