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Posted to commits@beam.apache.org by "ASF GitHub Bot (JIRA)" <ji...@apache.org> on 2016/09/23 23:38:21 UTC
[jira] [Commented] (BEAM-310) Exercise
splitIntoBundles/generateInitialSplits in the Direct Runner
[ https://issues.apache.org/jira/browse/BEAM-310?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15517886#comment-15517886 ]
ASF GitHub Bot commented on BEAM-310:
-------------------------------------
GitHub user tgroh opened a pull request:
https://github.com/apache/incubator-beam/pull/996
[BEAM-310] Add RootTransformEvaluatorFactory, Use for Reads
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---
This is an extension of TransformEvaluatorFactory that applies to
transforms that can be the root transform of a Pipeline. They produce
bundles which provide an impulse to the PTransforms that are at the root
of the Pipeline.
Add an ImpulseBundle implementation to represent this impulse as a
bundle that is not part of a PCollection.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/tgroh/incubator-beam root_initial_splits
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/incubator-beam/pull/996.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #996
----
commit 8670bf7995639a95a3f2c3205b063f9c64ff18b9
Author: Thomas Groh <tg...@google.com>
Date: 2016-09-23T15:52:47Z
Add RootTransformEvaluatorFactory, Use for Reads
This is an extension of TransformEvaluatorFactory that applies to
transforms that can be the root transform of a Pipeline. They produce
bundles which provide an impulse to the PTransforms that are at the root
of the Pipeline.
Add an ImpulseBundle implementation to represent this impulse as a
bundle that is not part of a PCollection.
----
> Exercise splitIntoBundles/generateInitialSplits in the Direct Runner
> --------------------------------------------------------------------
>
> Key: BEAM-310
> URL: https://issues.apache.org/jira/browse/BEAM-310
> Project: Beam
> Issue Type: Improvement
> Components: runner-direct
> Reporter: Thomas Groh
> Assignee: Thomas Groh
>
> BoundedSource#splitIntoBundles and UnboundedSource#generateInitialSplits are the methods by which sources can be accessed in parallel. Exercising these methods allows reads (and all transforms downstream) to be executed in parallel both pre and post a GroupByKey
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