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Re: Out of memory (heap space) errors on job tracker - MapReduce - [mail # user]
...Harsh - I'd be inclined to think it's worse than just setting  mapreduce.jobtracker.completeuserjobs.maximum - the only case this would  solve is if a single user submitted 25 *lar...
   Author: Arun C Murthy, 2012-06-11, 00:39
Re: Idle nodes with terasort and MRv2/YARN (0.23.1) - MapReduce - [mail # user]
...Trevor,  On May 30, 2012, at 1:38 PM, Trevor Robinson wrote:   The default is way too low (128M) which is non-optimal.  I've opened https://issues.apache.org/jira/browse/MAPRE...
   Author: Arun C Murthy, 2012-06-05, 12:35
[MAPREDUCE-268] Implement memory-to-memory merge in the reduce - MapReduce - [issue]
...HADOOP-3446 fixed the reduce to not flush the in-memory shuffled map-outputs before feeding to the reduce. However for latency-sensitive applications with lots of memory like the terasort th...
http://issues.apache.org/jira/browse/MAPREDUCE-268    Author: Arun C Murthy, 2012-06-05, 02:37
Re: Good learning resources for 0.23? - MapReduce - [mail # user]
...Keith,   Happy to help.   When you mean .23 API, do you mean how to write your own applications  on top of YARN?   If so, you can start with hadoop-2 release docs:  ...
   Author: Arun C Murthy, 2012-05-24, 02:27
[MAPREDUCE-3563] LocalJobRunner doesn't handle Jobs using o.a.h.mapreduce.OutputCommitter - MapReduce - [issue]
...LocalJobRunner doesn't handle Jobs using o.a.h.mapreduce.OutputCommitter, ran into this debugging PIG-2347....
http://issues.apache.org/jira/browse/MAPREDUCE-3563    Author: Arun C Murthy, 2012-05-23, 12:13
Re: API to get info for deprecated key - MapReduce - [mail # user]
...Good point. Please file a jira to add the new key to the deprecation  warning. Thanks.  On May 22, 2012, at 12:52 AM, Subroto wrote:  the concern while working with MR. adding...
   Author: Arun C Murthy, 2012-05-22, 16:26
Re: resource schedulling - MapReduce - [mail # dev]
...Sure, thanks!  On May 21, 2012, at 2:26 AM, Radim Kolar wrote:  MAPREDUCE-4256, please take a look at it and share your comments.  Arun C. Murthy Hortonworks Inc. http://horto...
   Author: Arun C Murthy, 2012-05-21, 17:26
Terasort - MapReduce - [mail # user]
...Changing subject...  On May 10, 2012, at 3:40 PM, Jeffrey Buell wrote:  those slots are filled with tasks. The problem I ran into was that the  maps grabbed all the slots init...
   Author: Arun C Murthy, 2012-05-10, 22:49
Re: max 1 mapper per node - MapReduce - [mail # user]
...For terasort you want to fill up your entire cluster with maps/reduces  as fast as you can to get the best performance.  Just play with #slots.  Arun  On May 9, 2012, at ...
   Author: Arun C Murthy, 2012-05-10, 20:26
[MAPREDUCE-2694] AM releases too many containers due to the protocol - MapReduce - [issue]
...AM sends request asking 4 containers on host H1. Asynchronously, host H1 reaches RM and gets assigned 4 containers. RM at this point, sets the value against H1 tozero in its aggregate reques...
http://issues.apache.org/jira/browse/MAPREDUCE-2694    Author: Arun C Murthy, 2012-04-30, 15:50
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