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[MAPREDUCE-4863] Adding aggregationWaitMap for node-level combiner. - MapReduce - [issue]
...To manage node/rack-level combining, MRAppMaster needs to have a management information about outputs of completed MapTasks to be aggregated.  AggregationWaitMap is used so that MRAppMa...
http://issues.apache.org/jira/browse/MAPREDUCE-4863    Author: Tsuyoshi OZAWA, 2013-01-18, 05:56
Re: Fault injection framework for testing - MapReduce - [mail # dev]
...I confirmed that tests code with Groovy works well. I'll throw patch when I finish to write my test case.  Thanks, Tsuyoshi  On Wed, Jan 16, 2013 at 2:21 PM, Tsuyoshi OZAWA  w...
   Author: Tsuyoshi OZAWA, 2013-01-16, 08:01
Re: Fault injection framework for testing - MapReduce - [mail # dev]
...added.  I see, I've understood its simplicity may be acceptable. I'll try it.  Tsuyoshi  On Wed, Jan 16, 2013 at 1:32 PM, Konstantin Boudnik  wrote:    OZAWA Ts...
   Author: Tsuyoshi OZAWA, 2013-01-16, 05:21
Re: Fault injection framework for testing - MapReduce - [mail # dev]
...Thanks for your comment. Your comment is helpful for me.  I'd like to go with 2nd approach - MOP with Groovy. In that case, how can I add test code to the trunk? Is it acceptable for Ha...
   Author: Tsuyoshi OZAWA, 2013-01-16, 04:18
Fault injection framework for testing - MapReduce - [mail # dev]
...Hi,  I've created patch for MAPREDUCE-4502. Now, I confirmed that it works well for usual case, and I also added code to handle MapTask failure.  As a next step, I need to add test...
   Author: Tsuyoshi OZAWA, 2013-01-15, 17:19
Re: queues in haddop - MapReduce - [mail # user]
...You can also use fluentd. http://fluentd.org/ "Fluentd receives logs as JSON streams, buffers them, and sends them to other systems like Amazon S3, MongoDB, Hadoop, or other Fluentds." It ha...
   Author: Tsuyoshi OZAWA, 2013-01-11, 14:08
Re: "attempt*" directories in user logs - MapReduce - [mail # user]
...Hi Oleg,  Speculative tasks can be launched as TaskAttempt in MR jobs. And, if no reducer class is set, MR launches default Reducer class(IdentityReducer).  Thanks, Tsuyoshi  ...
   Author: Tsuyoshi OZAWA, 2012-12-10, 08:18
Re: Assigning reduce tasks to specific nodes - MapReduce - [mail # user]
...Hi Hioryuki,  Lately I've changed scheduler for improving hadoop, so I may help you.  RMContainerAllocator#handleEvent decides MapTasks to allocated containers.   You can impl...
   Author: Tsuyoshi OZAWA, 2012-12-08, 07:59
[MAPREDUCE-4525] Combiner per node - MapReduce - [issue]
...This JIRA is to implement the combining per container(MAPREDUCE-3902 is related), coordinating containers by application master without breaking fault tolerance of jobs....
http://issues.apache.org/jira/browse/MAPREDUCE-4525    Author: Tsuyoshi OZAWA, 2012-09-11, 02:41
[MAPREDUCE-4582] [MAPREDUCE-3902] ScheduledRequests#remove should remove the elements from mapsHostMapping and mapsRackMapping - MapReduce - [issue]
...ScheduledRequests#remove only remove the specified TaskAttemptId from "maps".It's inefficient, and the method should remove the elements from mapsHostMapping and mapsRackMapping....
http://issues.apache.org/jira/browse/MAPREDUCE-4582    Author: Tsuyoshi OZAWA, 2012-09-04, 19:17
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