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[MAPREDUCE-5192] Separate TCE resolution from fetch - MapReduce - [issue]
...The EventFetcher thread grounds task completion events as URIs before passing them to the ShuffleScheduler. If the former deferred this to the scheduler, one could interpret the TCE metadata...
http://issues.apache.org/jira/browse/MAPREDUCE-5192    Author: Chris Douglas, 2013-06-16, 15:07
Re: [VOTE] Release Apache Hadoop 0.23.8 - MapReduce - [mail # dev]
...+1  Checksum and signature match, ran some tests. -C  On Mon, Jun 3, 2013 at 1:19 PM, Sandy Ryza  wrote:...
   Author: Chris Douglas, 2013-06-03, 23:13
Re: [VOTE] Release Apache Hadoop 2.0.5-alpha (rc2) - MapReduce - [mail # dev]
...+1  Checksum and signature match, ran some unit tests, checked diff against 2.0.4-alpha.  Thanks for seeing this through, Cos. -C  On Mon, Jun 3, 2013 at 1:13 PM, Alejandro Ab...
   Author: Chris Douglas, 2013-06-03, 22:22
Re: [Vote] Merge branch-trunk-win to trunk - MapReduce - [mail # dev]
...On Fri, Mar 1, 2013 at 1:57 PM, Konstantin Shvachko  wrote:  As several people have pointed out already, the surface of possible conflicts is relatively limited, and- as you did in...
   Author: Chris Douglas, 2013-03-02, 00:57
[MAPREDUCE-4586] Reduce large output segments directly from remote host - MapReduce - [issue]
...For some jobs, copying large output segments to the local host is inefficient. The reduce can construct iterators on remote hosts, provided the stream is restartable. This should reduce task...
http://issues.apache.org/jira/browse/MAPREDUCE-4586    Author: Chris Douglas, 2012-12-11, 18:54
Re: Hadoop map-side join - MapReduce - [mail # user]
...See https://issues.apache.org/jira/browse/MAPREDUCE-355 (not in 1.x series) -C  On Tue, Nov 13, 2012 at 8:26 AM, Guang Yang  wrote:...
   Author: Chris Douglas, 2012-11-14, 17:42
Re: Join-package in new API? - MapReduce - [mail # user]
...It was ported in a later version:  https://issues.apache.org/jira/browse/MAPREDUCE-355  -C  On Wed, Oct 10, 2012 at 7:47 AM, Sigurd Spieckermann  wrote:...
   Author: Chris Douglas, 2012-10-18, 18:56
Re: How does map-merge work exactly? - MapReduce - [mail # user]
...On Thu, Sep 13, 2012 at 7:04 AM, Martin Dobmeier  wrote:  A segment in this context is a fraction of spill output for a particular reduce. Each spill contains a segment for every r...
   Author: Chris Douglas, 2012-09-17, 08:21
[MAPREDUCE-4585] Checkpoint shuffle aggregation as map output - MapReduce - [issue]
...Map output collected during the shuffle can be spilled and written as a composite of map outputs. Particularly if the job employs a combiner, this checkpoint can provide fault tolerance and ...
http://issues.apache.org/jira/browse/MAPREDUCE-4585    Author: Chris Douglas, 2012-08-27, 20:19
[MAPREDUCE-4592] Collect statistics on key distributions/samples in intermediate data - MapReduce - [issue]
...Some jobs would benefit from statistics about the key distribution of intermediate data, including sampling for jobs implementing a total-order in the job. These data can inform a policy for...
http://issues.apache.org/jira/browse/MAPREDUCE-4592    Author: Chris Douglas, 2012-08-25, 01:21
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