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[MAPREDUCE-5787] Modify ShuffleHandler to support Keep-Alive - MapReduce - [issue]
http://issues.apache.org/jira/browse/MAPREDUCE-5787    Author: Rajesh Balamohan, 2014-04-10, 14:12
[MAPREDUCE-5786] Support Keep-Alive connections in ShuffleHandler - MapReduce - [issue]
...Currently ShuffleHandler supports fetching map-outputs in batches from same host.  But there are scenarios wherein, fetchers pull data aggressively (i.e start pulling the data as & ...
http://issues.apache.org/jira/browse/MAPREDUCE-5786    Author: Rajesh Balamohan, 2014-03-21, 21:46
[MAPREDUCE-5788] Modify Fetcher to pull data using persistent connection - MapReduce - [issue]
http://issues.apache.org/jira/browse/MAPREDUCE-5788    Author: Rajesh Balamohan, 2014-03-20, 19:20
Re: Hadoop Jobtracker cluster summary of heap size and OOME - MapReduce - [mail # user]
...JT OOM??.. Refer https://issues.apache.org/jira/browse/MAPREDUCE-5508  (but JT OOM should happen over a period of time. Not immediately).   On Tue, Oct 15, 2013 at 7:44 AM, Viswana...
   Author: Rajesh Balamohan, 2013-10-15, 02:39
[MAPREDUCE-1533] Reduce or remove usage of String.format() usage in CapacityTaskScheduler.updateQSIObjects and Counters.makeEscapedString() - MapReduce - [issue]
...When short jobs are executed in hadoop with OutOfBandHeardBeat=true, JT executes heartBeat() method heavily. This internally makes a call to CapacityTaskScheduler.updateQSIObjects(). Capacit...
http://issues.apache.org/jira/browse/MAPREDUCE-1533    Author: Rajesh Balamohan, 2011-12-12, 06:19
[MAPREDUCE-1461] Feature to instruct rumen-folder utility to skip jobs worth of specific duration - MapReduce - [issue]
...JSON outputs of rumen on production logs can be huge in the order of multiple GB. Rumen's folder utility helps in getting a smaller snapshot of this JSON data.It would be helpful to have an ...
http://issues.apache.org/jira/browse/MAPREDUCE-1461    Author: Rajesh Balamohan, 2011-11-15, 00:49
[MAPREDUCE-1904] Reducing locking contention in TaskTracker.MapOutputServlet's LocalDirAllocator - MapReduce - [issue]
...While profiling tasktracker with Sort benchmark, it was observed that threads block on LocalDirAllocator.getLocalPathToRead() in order to get the index file and temporary map output file.As ...
http://issues.apache.org/jira/browse/MAPREDUCE-1904    Author: Rajesh Balamohan, 2011-06-15, 05:53
[MAPREDUCE-1495] Reduce locking contention on JobTracker.getTaskCompletionEvents() - MapReduce - [issue]
...While profiling JT for slow performance with small-jobs, it was observed that JobTracker.getTaskCompletionEvents() is attributing to 40% of lock contention on JT.This JIRA ticket is created ...
http://issues.apache.org/jira/browse/MAPREDUCE-1495    Author: Rajesh Balamohan, 2010-02-16, 19:52
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