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[MAPREDUCE-4513] Make MR AM thread-safe - MapReduce - [issue]
...Currently MR-AM has a bunch of statics making it thread unsafe. We should fix that....
http://issues.apache.org/jira/browse/MAPREDUCE-4513    Author: Arun C Murthy, 2012-08-03, 17:44
[MAPREDUCE-4327] Enhance CS to schedule accounting for both memory and cpu cores - MapReduce - [issue]
...With YARN being a general purpose system, it would be useful for several applications (MPI et al) to specify not just memory but also CPU (cores) for their resource requirements. Thus, it wo...
http://issues.apache.org/jira/browse/MAPREDUCE-4327    Author: Arun C Murthy, 2012-08-02, 22:20
[MAPREDUCE-4334] Add support for CPU isolation/monitoring of containers - MapReduce - [issue]
...Once we get in MAPREDUCE-4327, it will be important to actually enforce limits on CPU consumption of containers. Several options spring to mind: taskset (RHEL5+) cgroups (RHEL6+)...
http://issues.apache.org/jira/browse/MAPREDUCE-4334    Author: Arun C Murthy, 2012-08-02, 15:11
Re: What are the basic Hadoop Java Classes? - MapReduce - [mail # user]
...http://hadoop.apache.org/common/docs/r1.0.3/mapred_tutorial.html  Arun  On Jul 30, 2012, at 12:25 PM,    wrote:  to run a program in Hadoop?  By basic classes I...
   Author: Arun C Murthy, 2012-07-30, 23:41
Re: Reducer - getMapOutput - MapReduce - [mail # user]
...Hey Robert,   Can you pls share what you are trying to do?  Arun  On Jul 30, 2012, at 9:10 AM, Grandl Robert wrote:  output.  connection with the TaskTracker(setupSe...
   Author: Arun C Murthy, 2012-07-30, 17:45
[MAPREDUCE-1183] Serializable job components: Mapper, Reducer, InputFormat, OutputFormat et al - MapReduce - [issue]
...Currently the Map-Reduce framework uses Configuration to pass information about the various aspects of a job such as Mapper, Reducer, InputFormat, OutputFormat, OutputCommitter etc. and appl...
http://issues.apache.org/jira/browse/MAPREDUCE-1183    Author: Arun C Murthy, 2012-07-26, 15:43
[MAPREDUCE-4476] Add more unit tests for CPU scheduling in CS - MapReduce - [issue]
...Companion to MAPREDUCE-4327....
http://issues.apache.org/jira/browse/MAPREDUCE-4476    Author: Arun C Murthy, 2012-07-24, 19:55
[MAPREDUCE-1966] Fix tracker blacklisting - MapReduce - [issue]
...The current heuristic of rolling up fixed number of job failures per tracker isn't working well, we need better design/heuristics....
http://issues.apache.org/jira/browse/MAPREDUCE-1966    Author: Arun C Murthy, 2012-07-23, 20:08
Re: Need review - MapReduce - [mail # dev]
...Sure, I'll take a look. I'll ping Bikas who wrote the original too!  Thanks Radim!  On Jul 20, 2012, at 5:33 AM, Radim Kolar wrote:   Arun C. Murthy Hortonworks Inc. http://ho...
   Author: Arun C Murthy, 2012-07-21, 21:17
[MAPREDUCE-4439] MAPREDUCE-3451 introduced a bunch of findbugs warnings - MapReduce - [issue]
...Committed findbugs exclusions (hadoop-mapreduce-project/hadoop-yarn/dev-support/findbugs-exclude.xml) as an amendment of MAPREDUCE-3451. Lower priority to major as warnings are excluded.Reas...
http://issues.apache.org/jira/browse/MAPREDUCE-4439    Author: Arun C Murthy, 2012-07-19, 01:42
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