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From "ASF GitHub Bot (JIRA)" <>
Subject [jira] [Commented] (BEAM-814) Improve performance when staging files
Date Thu, 26 Jan 2017 06:19:25 GMT


ASF GitHub Bot commented on BEAM-814:

GitHub user dhalperi opened a pull request:

    [BEAM-814] Dataflow: parallelize staging of files

    Resubmitting #1184 with a fix to preserve the classpath ordering (and a new test!)
    R: @tgroh or @lukecwik (if avail)
    The first commit is exactly the same as already-reviewed #1184; only need to review the
second commit (or the relevant part of the union).

You can merge this pull request into a Git repository by running:

    $ git pull dataflow-runner-speedup-2

Alternatively you can review and apply these changes as the patch at:

To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:

    This closes #1849
commit 23e2b913946acb2690fbac2d751a5672d80121aa
Author: Dan Halperin <>
Date:   2017-01-26T05:04:20Z

    Recommit "DataflowRunner: parallelize staging of files"
    Revert "This closes #1847"
    This reverts commit 1c6e667414788fe99f583fac39d458a4984ae162, reversing
    changes made to 6413299a20be57de849684479134479fa1acee2d.

commit b0b91c842e09aa7fdb5c1dc216574daa43b437ea
Author: Dan Halperin <>
Date:   2017-01-26T06:15:59Z

    PackageUtil: preserve classpath ordering when uploading
    Also add a test


> Improve performance when staging files
> --------------------------------------
>                 Key: BEAM-814
>                 URL:
>             Project: Beam
>          Issue Type: Improvement
>          Components: runner-dataflow
>            Reporter: Daniel Halperin
>            Assignee: Daniel Halperin
>            Priority: Minor
>             Fix For: 0.5.0
> Right now, {{PackageUtil}} hashes/compresses/sizes files, checks if they have already
been staged, and uploads them if not, completely serially.
> There is some low-hanging fruit to parallelize this.

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