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[MAPREDUCE-5725] TestNetworkedJob relies on the Capacity Scheduler - MapReduce - [issue]
...We should either make this explicit or make it scheduler-agnostic....
http://issues.apache.org/jira/browse/MAPREDUCE-5725    Author: Sandy Ryza, 2014-01-28, 23:33
[MAPREDUCE-5601] ShuffleHandler fadvises file regions as DONTNEED even when fetch fails - MapReduce - [issue]
...When a reducer initiates a fetch request, it does not know whether it will be able to fit the fetched data in memory.  The first part of the response tells how much data will be coming....
http://issues.apache.org/jira/browse/MAPREDUCE-5601    Author: Sandy Ryza, 2014-01-28, 23:33
Re: Doubt in Yarn Scheduler. - MapReduce - [mail # dev]
...Hi Suresh,The schedulers used in MR1 are not compatible with the schedulers used inMR2 / YARN.  Check out ResourceScheduler.java for the updated interface.I believe that speculative exe...
   Author: Sandy Ryza, 2014-01-27, 22:17
[MAPREDUCE-5651] Backport Fair Scheduler queue placement policies to branch-1 - MapReduce - [issue]
...YARN-1392 introduced general policies for assigning applications to queues in the YARN fair scheduler.  This functionality would be useful and minimally invasive in MR1 as well....
http://issues.apache.org/jira/browse/MAPREDUCE-5651    Author: Sandy Ryza, 2014-01-07, 23:53
[expand - 1 more] - Re: Issues with ResourceManager scheduling functions - MapReduce - [mail # user]
...Try requesting all your 100GB containers with priority 1 and your 50 GB containers with priority 2.  -Sandy   On Mon, Dec 9, 2013 at 12:59 AM, Bill Q  wrote:  ...
   Author: Sandy Ryza, 2013-12-09, 09:02
Re: MapReduce Job running Problems with queue designation in fair scheduler for Yarn-2.2.0. - MapReduce - [mail # user]
...Hi Tang,  One concerning thing is that the vcores for amelie's maxResources is set to 1.  Not sure how that would lead to the error you're seeing, but it would prevent applications...
   Author: Sandy Ryza, 2013-12-06, 20:18
Re: Any reference for upgrade hadoop from 1.x to 2.2 - MapReduce - [mail # user]
...Not that I'm aware of.  -Sandy   On Thu, Dec 5, 2013 at 10:11 PM, Nirmal Kumar wrote:  ...
   Author: Sandy Ryza, 2013-12-06, 07:16
Re: Perfect configuration setting - MapReduce - [mail # user]
...Hi Geelong,  Check out Todd Lipcon's presentation on tuning MapReduce performance: http://www.slideshare.net/cloudera/mr-perf  -Sandy   On Mon, Dec 2, 2013 at 11:14 PM, Geelon...
   Author: Sandy Ryza, 2013-12-03, 08:26
Re: problems of FairScheduler in hadoop2.2.0 - MapReduce - [mail # user]
...Hi,  Can you share the contents of your fair-scheduler.xml?  If you submit just a single job, does it run?  What do you see if you go to /ws/v1/cluster/scheduler?  -Sandy...
   Author: Sandy Ryza, 2013-11-27, 08:32
Re: Limit on total jobs running using fair scheduler - MapReduce - [mail # user]
...Unfortunately, this is not possible in the MR1 fair scheduler without setting the jobs for individual pools.  In MR2, fair scheduler hierarchical queues will allow setting maxRunningApp...
   Author: Sandy Ryza, 2013-11-19, 22:12
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