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[MAPREDUCE-4615] [MAPREDUCE-3902] RMContainerAllocator#assign should be split into functions - MapReduce - [issue]
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...Currently, the RMContainerAllocator#assign functions does a lot of works inside the one function. This is a bit confusing and make the changes difficult, so this ticket is for refactoring th...
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http://issues.apache.org/jira/browse/MAPREDUCE-4615
Author: Tsuyoshi OZAWA,
2012-08-31, 23:02
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[MAPREDUCE-4609] [MAPREDUCE-3902] RMContainerAllocator#scheduleInterval should be configurable - MapReduce - [issue]
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...Currently, RMContainerAllocator#scheduleInterval is fixed. It should be configurable....
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http://issues.apache.org/jira/browse/MAPREDUCE-4609
Author: Tsuyoshi OZAWA,
2012-08-31, 21:20
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[MAPREDUCE-4599] [MAPREDUCE-3902] Ensure not to launch container on blacklisted hosts - MapReduce - [issue]
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...The current implementation of RMContainerAllocator doesn't ensure not to launch containers on blacklisted nodes. This may cause some skews by tasks on bad nodes....
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http://issues.apache.org/jira/browse/MAPREDUCE-4599
Author: Tsuyoshi OZAWA,
2012-08-29, 19:32
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Re: How to reduce total shuffle time - MapReduce - [mail # user]
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...It depends of workload. Could you tell us more specification about your job? In general case which reducers are bottleneck, there are some tuning techniques as follows: 1. Allocate more memo...
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Author: Tsuyoshi OZAWA,
2012-08-28, 08:37
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[MAPREDUCE-4581] [MAPREDUCE-3902] TaskHeartbeatHandler should extends HeartbeatHandlerBase - MapReduce - [issue]
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...TaskHeartbeatHandler extends AbstractService currently, however, this causes code duplication between TaskHeartbeatHandler and HeartbeatHandlerBase. TaskHeartbeatHandler should extends Heart...
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http://issues.apache.org/jira/browse/MAPREDUCE-4581
Author: Tsuyoshi OZAWA,
2012-08-25, 21:27
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Re: Branch created for MAPREDUCE-3902 - MapReduce - [mail # dev]
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...Thanks for your quick response :) Tsuyoshi On Fri, Aug 24, 2012 at 2:08 PM, Siddharth Seth wrote:...
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Author: Tsuyoshi OZAWA,
2012-08-24, 05:16
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Re: Branch created for MAPREDUCE-3902 - MapReduce - [mail # dev]
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...I created new JIRA ticket(MAPREDUCE-4581) for the new branch(MR-3902). Then I tried to specify MR-3902 branch as the Affects Version/s from the lists on JIRA, however, the branch is missing....
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Author: Tsuyoshi OZAWA,
2012-08-24, 04:30
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Re: Branch created for MAPREDUCE-3902 - MapReduce - [mail # dev]
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...Thanks for your work, Sid! I'll throw some patches I have and help to fix TODOs against the new branch. - Tsuyoshi On Thursday, August 23, 2012, Siddharth Seth wrote: &nbs...
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Author: Tsuyoshi OZAWA,
2012-08-23, 06:03
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Re: Multi-level aggregation with combining the result of maps per node/rack - MapReduce - [mail # dev]
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...Bikas, Yes, this feature is similar to Dryad approach. The design of current prototype is a bit hacky to minimize the costs of implementation. The modified file is only MapTask.java. P...
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Author: Tsuyoshi OZAWA,
2012-08-01, 07:51
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Re: Multi-level aggregation with combining the result of maps per node/rack - MapReduce - [mail # dev]
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...Robert, Thank you for your precious opinion and sharing the related JIRA tickets. The combination consisting of reusing container (MAPREDUCE-3902) and the coordination system in ...
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Author: Tsuyoshi OZAWA,
2012-08-01, 06:48
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