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[MAPREDUCE-4518] FairScheduler: PoolSchedulable#updateDemand() - potential redundant aggregation - MapReduce - [issue]
...In FS, PoolSchedulable#updateDemand() limits the demand to maxTasks only after iterating though all the pools and computing the final demand. By checking if the demand has reached maxTasks i...
http://issues.apache.org/jira/browse/MAPREDUCE-4518    Author: Karthik Kambatla, 2012-08-14, 07:37
Re: Mailing list for YARN? - MapReduce - [mail # dev]
...Thanks Alejandro.  On Wed, Aug 8, 2012 at 10:22 AM, Alejandro Abdelnur wrote:  ...
   Author: Karthik Kambatla, 2012-08-08, 17:53
[MAPREDUCE-4500] TestUlimit is failing locally - MapReduce - [issue]
...ant clean test -Dtestcase=TestUlimit -Dtest.output=yes fails locallyAttaching the dump...
http://issues.apache.org/jira/browse/MAPREDUCE-4500    Author: Karthik Kambatla, 2012-08-01, 00:22
Re: MRv2 jobs fail when run with more than one slave - MapReduce - [mail # user]
...Forwarding your email to the cdh-user group.  Thanks Karthik  On Tue, Jul 17, 2012 at 2:24 PM, Trevor  wrote:  ...
   Author: Karthik Kambatla, 2012-07-17, 23:18
WebUI issues - MapReduce - [mail # dev]
...Hello  I was trying to build the trunk and run MR2 in pseudo-distributed mode. The jobs run fine, I can see the wordcount output on hdfs. However, the WebUI doesn't reflect the applicat...
   Author: Karthik Kambatla, 2012-07-16, 23:51
[MAPREDUCE-4355] Add RunningJob.getJobStatus() - MapReduce - [issue]
...Usecase: Read the start/end-time of a particular job.Currently, one has to iterate through JobClient.getAllJobStatuses() and iterate through them. JobClient.getJob(JobID) returns RunningJob,...
http://issues.apache.org/jira/browse/MAPREDUCE-4355    Author: Karthik Kambatla, 2012-07-10, 20:26
Re: issue with map running time - MapReduce - [mail # user]
...Manoj,  By running an MR job on many small files, one does incur latency costs of reading individual files. These costs can be addressed to some extent by re-using the JVM across map ta...
   Author: Karthik Kambatla, 2012-07-10, 08:39
Re: Basic question on how reducer works - MapReduce - [mail # user]
...The partitioner is configurable. The default partitioner, from what I remember, computes the partition as the hashcode modulo number of reducers/partitions. For random input, it is balanced,...
   Author: Karthik Kambatla, 2012-07-10, 03:33
Re: - MapReduce - [mail # user]
...Hi Nishan  Let me forward this to the right list -   Thanks Karthik  On Thu, Jul 5, 2012 at 6:43 AM, Nishan Shetty wro te:  ***...
   Author: Karthik Kambatla, 2012-07-05, 16:36
Re: 答复: How To Distribute One Map Data To All Reduce Tasks? - MapReduce - [mail # user]
...One way to achieve this would be to:     1. Emit the same value multiple times, each time with a different key.    2. Use these different keys, in conjunction with the pa...
   Author: Karthik Kambatla, 2012-07-05, 08:10
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