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From "Daniel Halperin (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (BEAM-344) Merge, Split, Delay, and Reorder bundles in the DirectRunner
Date Thu, 29 Sep 2016 18:17:20 GMT

     [ https://issues.apache.org/jira/browse/BEAM-344?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Daniel Halperin updated BEAM-344:
---------------------------------
    Assignee:     (was: Thomas Groh)

> Merge, Split, Delay, and Reorder bundles in the DirectRunner
> ------------------------------------------------------------
>
>                 Key: BEAM-344
>                 URL: https://issues.apache.org/jira/browse/BEAM-344
>             Project: Beam
>          Issue Type: Improvement
>          Components: runner-direct
>            Reporter: Thomas Groh
>            Priority: Minor
>
> PCollections have no guarantees about the ordering of elements between steps
> Randomly reordering, splitting and merging bundles will break user pipelines which assume
some order will be maintained between steps and within a bundle. This assumption is not correct,
so should break in the Direct Runner.



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