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[MAPREDUCE-516] Fix the 'cluster drain' problem in the Capacity Scheduler wrt High RAM Jobs - MapReduce - [issue]
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...When a HighRAMJob turns up at the head of the queue, the current implementation of support for HighRAMJobs in the Capacity Scheduler has problem in that the scheduler stops assigning tasks t...
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http://issues.apache.org/jira/browse/MAPREDUCE-516
Author: Arun C Murthy,
2012-06-17, 07:27
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[MAPREDUCE-279] Map-Reduce 2.0 - MapReduce - [issue]
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...Re-factor MapReduce into a generic resource scheduler and a per-job, user-defined component that manages the application execution....
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http://issues.apache.org/jira/browse/MAPREDUCE-279
Author: Arun C Murthy,
2012-06-17, 07:08
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Re: Out of memory (heap space) errors on job tracker - MapReduce - [mail # user]
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...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...
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Author: Arun C Murthy,
2012-06-11, 00:39
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Re: Out of memory (heap space) errors on job tracker - MapReduce - [mail # user]
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...This shouldn't be happening at all... What version of hadoop are you running? Potentially you need configs to protect the JT that you are missing, those should ensure your hadoop...
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Author: Arun C Murthy,
2012-06-08, 18:59
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Re: Idle nodes with terasort and MRv2/YARN (0.23.1) - MapReduce - [mail # user]
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...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...
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Author: Arun C Murthy,
2012-06-05, 12:35
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[MAPREDUCE-268] Implement memory-to-memory merge in the reduce - MapReduce - [issue]
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...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...
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http://issues.apache.org/jira/browse/MAPREDUCE-268
Author: Arun C Murthy,
2012-06-05, 02:37
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Re: Idle nodes with terasort and MRv2/YARN (0.23.1) - MapReduce - [mail # user]
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...What is the minimum container size? i.e. yarn.scheduler.minimum-allocation-mb. I'd bump it up to at least 1G and use the CapacityScheduler for performance tests: http...
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Author: Arun C Murthy,
2012-05-29, 23:21
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Re: Good learning resources for 0.23? - MapReduce - [mail # user]
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...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: ...
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Author: Arun C Murthy,
2012-05-24, 02:27
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[MAPREDUCE-3563] LocalJobRunner doesn't handle Jobs using o.a.h.mapreduce.OutputCommitter - MapReduce - [issue]
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...LocalJobRunner doesn't handle Jobs using o.a.h.mapreduce.OutputCommitter, ran into this debugging PIG-2347....
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http://issues.apache.org/jira/browse/MAPREDUCE-3563
Author: Arun C Murthy,
2012-05-23, 12:13
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Re: API to get info for deprecated key - MapReduce - [mail # user]
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...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...
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Author: Arun C Murthy,
2012-05-22, 16:26
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