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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
[expand - 4 more] - Re: Allocating Containers on a particular Node in Yarn - MapReduce - [mail # user]
...Yeah, you're right, I meant when locality relaxation is turned off.  I'm not super familiar with the capacity scheduler (more familiar with the fair scheduler), so maybe someone with kn...
   Author: Sandy Ryza, 2013-11-14, 21:33
[expand - 1 more] - Re: Next releases - MapReduce - [mail # dev]
...Here are few patches that I put into 2.2.1 and are minimally invasive, but I don't think are blockers:    YARN-305. Fair scheduler logs too many "Node offered to app" messages. &nb...
   Author: Sandy Ryza, 2013-11-13, 18:38
[MAPREDUCE-5612] Document TaskAttemptCompletionEventStatuses - MapReduce - [issue]
...What's the difference between FAILED and TIPFAILED?  What is OBSOLETE?...
http://issues.apache.org/jira/browse/MAPREDUCE-5612    Author: Sandy Ryza, 2013-11-12, 03:28
[MAPREDUCE-5608] Replace and deprecate mapred.tasktracker.indexcache.mb - MapReduce - [issue]
...In MR2 mapred.tasktracker.indexcache.mb still works for configuring the size of the shuffle service index cache.  As the tasktracker no longer exists, we should replace this with someth...
http://issues.apache.org/jira/browse/MAPREDUCE-5608    Author: Sandy Ryza, 2013-11-07, 02:53
[MAPREDUCE-5592] Backport MAPREDUCE-1119 (stack traces on task timeout) in branch-1 - MapReduce - [issue]
...MAPREDUCE-1119 dumps stack traces on a task timeout, making it easier this difficult case easier to debug.  This made it into 0.21, but never into branch-1, and the backport very very d...
http://issues.apache.org/jira/browse/MAPREDUCE-5592    Author: Sandy Ryza, 2013-11-05, 00:18
[MAPREDUCE-4680] Job history cleaner should only check timestamps of files in old enough directories - MapReduce - [issue]
...Job history files are stored in yyyy/mm/dd folders.  Currently, the job history cleaner checks the modification date of each file in every one of these folders to see whether it's past ...
http://issues.apache.org/jira/browse/MAPREDUCE-4680    Author: Sandy Ryza, 2013-10-29, 13:04
Re: question about preserving data locality in MapReduce with Yarn - MapReduce - [mail # user]
...Hi Ricky,  The input splits contain the locations of the blocks they cover.  The AM gets the information from the input splits and submits requests for those location.  Each c...
   Author: Sandy Ryza, 2013-10-29, 02:21
[MAPREDUCE-5599] JobHistoryServer unnecessarily copies all jobs on each query - MapReduce - [issue]
...Instead, in CachedHistoryStorage, we should only copy jobs that will be returned....
http://issues.apache.org/jira/browse/MAPREDUCE-5599    Author: Sandy Ryza, 2013-10-28, 23:40
[expand - 3 more] - Re: Why my tests shows Yarn is worse than MRv1 for terasort? - MapReduce - [mail # user]
...Based on SLOTS_MILLIS_MAPS, it looks like your map tasks are taking about three times as long in MR2 as they are in MR1.  This is probably because you allow twice as many map tasks to r...
   Author: Sandy Ryza, 2013-10-23, 16:40
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NEW: Monitor These Apps!
elasticsearch, apache solr, apache hbase, hadoop, redis, casssandra, amazon cloudwatch, mysql, memcached, apache kafka, apache zookeeper, apache storm, ubuntu, centOS, red hat, debian, puppet labs, java, senseiDB