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From: mizitch <git@git.apache.org>
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Subject: [GitHub] incubator-beam pull request #1199: [BEAM-840] Add Java SDK extension to supp...
Content-Type: text/plain
Date: Wed, 26 Oct 2016 22:54:08 +0000 (UTC)
archived-at: Wed, 26 Oct 2016 22:54:18 -0000

GitHub user mizitch opened a pull request:

    https://github.com/apache/incubator-beam/pull/1199

    [BEAM-840] Add Java SDK extension to support non-distributed sorting

    Be sure to do all of the following to help us incorporate your contribution
    quickly and easily:
    
     - [x] Make sure the PR title is formatted like:
       `[BEAM-<Jira issue #>] Description of pull request`
     - [x] Make sure tests pass via `mvn clean verify`. (Even better, enable
           Travis-CI on your fork and ensure the whole test matrix passes).
     - [x] Replace `<Jira issue #>` in the title with the actual Jira issue
           number, if there is one.
     - [x] If this contribution is large, please file an Apache
           [Individual Contributor License Agreement](https://www.apache.org/licenses/icla.txt). (covered by Google's existing agreement with Apache)
    
    ---
    
    Add an extension that provides a PTransform which performs local(non-distributed) sorting. It will sort in memory until the buffer is full, then flush to disk and use external sorting.
    
    Consumes a PCollection of KVs from primary key to iterable of secondary key and value KVs and sorts the iterables. Would probably be called after a GroupByKey. Uses coders to convert secondary keys and values into byte arrays and does a lexicographical comparison on the secondary keys.
    
    Uses Hadoop as an external sorting library.
    
    Hi @dhalperi can you please take a look?
    
    https://issues.apache.org/jira/browse/BEAM-840

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

    $ git pull https://github.com/mizitch/incubator-beam sorter-extension

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

    https://github.com/apache/incubator-beam/pull/1199.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 #1199
    
----
commit e18fd4080b9331953c6cd8ba1fa509cfe56c787b
Author: Mitch Shanklin <mshanklin@google.com>
Date:   2016-10-25T23:17:01Z

    Add an extension that provides a PTransform which performs local(non-distributed) sorting. It will sort in memory until the buffer is full, then flush to disk and use external sorting.
    
    Consumes a PCollection of KVs from primary key to iterable of secondary key and value KVs and sorts the iterables. Would probably be called after a GroupByKey. Uses coders to convert secondary keys and values into byte arrays and does a lexicographical comparison on the secondary keys.
    
    Uses Hadoop as an external sorting library.

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