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Thinking ahead to hadoop-2.6 - MapReduce - [mail # dev]
...Folks, With hadoop-2.5 nearly done, it's time to start thinking ahead to hadoop-2.6. Currently, here is the Roadmap per the wiki:  • HADOOP • Credential provider HADOOP-10607...
   Author: Arun C Murthy, 2014-08-12, 20:35
Re: [VOTE] Release Apache Hadoop 2.5.0 RC2 - MapReduce - [mail # dev]
...+1 (binding)Verified sigs and ran sample jobs. Thanks for taking the lead on this Karthik.ArunOn Aug 6, 2014, at 1:59 PM, Karthik Kambatla  wrote:CONFIDENTIALITY NOTICENOTICE: This mess...
   Author: Arun C Murthy, 2014-08-12, 15:47
[MAPREDUCE-1872] Re-think (user|queue) limits on (tasks|jobs) in the CapacityScheduler - MapReduce - [issue]
...We need to re-think our story to have lead to a better overall picture of having limits on {users, queues} w.r.t Jobs - limits on submission, initialization Tasks - limits per-job, per...
http://issues.apache.org/jira/browse/MAPREDUCE-1872    Author: Arun C Murthy, 2014-07-30, 21:18
[MAPREDUCE-1841] o.a.h.mapreduce.FileOutputCommitter doens't check for existence of ${mapred.output.dir}/_temporary - MapReduce - [issue]
...o.a.h.mapred.FileOutputCommitter.getWorkOutputPath checks for existence of ${mapred.output.dir}/temporary to ensure tasks launched _after the job-cleanup task fail early (in a vast majority ...
http://issues.apache.org/jira/browse/MAPREDUCE-1841    Author: Arun C Murthy, 2014-07-30, 20:57
[MAPREDUCE-1717] Topology resolution should be asynchronous - MapReduce - [issue]
...Currently we hold the JT lock while resolving topology of nodes. We need to make this asynchronous w.r.t. the JT lock....
http://issues.apache.org/jira/browse/MAPREDUCE-1717    Author: Arun C Murthy, 2014-07-30, 19:09
[MAPREDUCE-1689] Write MR wire protocols in Avro IDL - MapReduce - [issue]
...As part of the the move to AVRO and wire compatibility, write all Map-Reduce protocols in AVRO IDL. This is analogous to HDFS-1069....
http://issues.apache.org/jira/browse/MAPREDUCE-1689    Author: Arun C Murthy, 2014-07-30, 18:10
[MAPREDUCE-1521] Protection against incorrectly configured reduces - MapReduce - [issue]
...We've seen a fair number of instances where naive users process huge data-sets (>10TB) with badly mis-configured #reduces e.g. 1 reduce.This is a significant problem on large clusters sin...
http://issues.apache.org/jira/browse/MAPREDUCE-1521    Author: Arun C Murthy, 2014-07-30, 00:35
[MAPREDUCE-1485] CapacityScheduler should have prevent a single job taking over large parts of a cluster - MapReduce - [issue]
...The proposal is to have a per-queue limit on the number of concurrent tasks a job can run on a cluster. We've seen cases where a single, large, job took over a majority of the cluster - wors...
http://issues.apache.org/jira/browse/MAPREDUCE-1485    Author: Arun C Murthy, 2014-07-30, 00:31
[MAPREDUCE-1261] Enhance mumak to implement a 'stress-test' for the JobTracker - MapReduce - [issue]
...I propose we enhance mumak to implement a proper 'stress-test' tool for the JobTracker. The idea is that we enhance mumak to have a mode where it can use the real JobTracker (and Scheduler o...
http://issues.apache.org/jira/browse/MAPREDUCE-1261    Author: Arun C Murthy, 2014-07-29, 21:58
[MAPREDUCE-1192] Use the DistributedCache for job.xml and job.jar - MapReduce - [issue]
...It would be more efficient if we used the DistributedCache for a job's configuration and jars....
http://issues.apache.org/jira/browse/MAPREDUCE-1192    Author: Arun C Murthy, 2014-07-29, 20:59
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