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https://issues.apache.org/jira/browse/MAPREDUCE-6823?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Steve Loughran updated MAPREDUCE-6823:
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Attachment: (was: MAPREDUCE-6823-004.patch)
> FileOutputFormat to support configurable PathOutputCommitter factory
> --------------------------------------------------------------------
>
> Key: MAPREDUCE-6823
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-6823
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: mrv2
> Affects Versions: 3.0.0-alpha2
> Environment: Targeting S3 as the output of work
> Reporter: Steve Loughran
> Assignee: Steve Loughran
> Attachments: HADOOP-13786-HADOOP-13345-001.patch,
> MAPREDUCE-6823-002.patch, MAPREDUCE-6823-002.patch, MAPREDUCE-6823-004.patch
>
>
> In HADOOP-13786 I'm adding a custom subclass for FileOutputFormat, one which
> can talk direct to the S3A Filesystem for more efficient operations, better
> failure modes, and, most critically, as part of HADOOP-13345, atomic commit
> of output. The normal committer relies on directory rename() being atomic for
> this; for S3 we don't have that luxury.
> To support a custom committer, we need to be able to tell FileOutputFormat
> (and implicitly, all subclasses which don't have their own custom committer),
> to use our new {{S3AOutputCommitter}}.
> I propose:
> # {{FileOutputFormat}} takes a factory to create committers.
> # The factory to take a URI and {{TaskAttemptContext}} and return a committer
> # the default implementation always returns a {{FileOutputCommitter}}
> # A configuration option allows a new factory to be named
> # An {{S3AOutputCommitterFactory}} to return a {{FileOutputCommitter}} or
> new {{S3AOutputCommitter}} depending upon the URI of the destination.
> Note that MRv1 already supports configurable committers; this is only the V2
> API
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