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Re: which mapreduce project to work on? - MapReduce - [mail # dev]
...Are you looking to do something similar to http://www.neilconway.org/docs/nsdi2010_hop.pdf?  Ideally you should be working on MR2 which replaces MR1, and MR2 is available in the current...
   Author: Harsh J, 2013-05-15, 10:54
[expand - 1 more] - Re: How do secondary name node get files from name node - MapReduce - [mail # user]
...SNN does not fetch data of NN from memory. It copies off of the stored edits and fsimage files at the NN at the time of checkpoint request.  The link I pointed to you has the current st...
   Author: Harsh J, 2013-05-14, 09:50
Re: Read namenode data from primary memory - MapReduce - [mail # user]
...If you're looking to tail the metadata changes for analysis purposes, there's a more pluggable approach available in 2.x versions.  If you're looking to backup the metadata outside of N...
   Author: Harsh J, 2013-05-14, 07:46
[MAPREDUCE-3807] JobTracker needs fix similar to HDFS-94 - MapReduce - [issue]
...1.0 JobTracker's jobtracker.jsp page currently shows:<h2>Cluster Summary (Heap Size is <%= StringUtils.byteDesc(Runtime.getRuntime().totalMemory()) %>/<%= StringUtils.byteDesc...
http://issues.apache.org/jira/browse/MAPREDUCE-3807    Author: Harsh J, 2013-05-14, 06:14
[MAPREDUCE-4454] MR does not audit-log the job kill operations - MapReduce - [issue]
...Currently the JobTracker/MR AM's AuditLogger logs only job successes and failures.We should also log other things such as KILL, etc. (All under the Operations enum) such that MR has a proper...
http://issues.apache.org/jira/browse/MAPREDUCE-4454    Author: Harsh J, 2013-05-14, 05:26
Re: Hadoop schedulers! - MapReduce - [mail # user]
...Hi,  On Sat, May 11, 2013 at 8:31 PM, Rahul Bhattacharjee  wrote:  I'd suggest reading design of both schedulers. The preemption feature is not the only difference - there is ...
   Author: Harsh J, 2013-05-13, 18:51
[expand - 2 more] - Re: How to combine input files for a MapReduce job - MapReduce - [mail # user]
...Yes I believe the branch-1 patch attached there should apply cleanly to 1.0.4.  On Mon, May 13, 2013 at 1:25 PM, Agarwal, Nikhil  wrote:    Harsh J...
   Author: Harsh J, 2013-05-13, 07:58
[expand - 1 more] - Re: issues with decrease the default.block.size - MapReduce - [mail # user]
...Thanks. I failed to add: It should be okay to do if those cases are true and the cluster seems under-utilized right now.  On Fri, May 10, 2013 at 8:29 PM, yypvsxf19870706  wrote: &...
   Author: Harsh J, 2013-05-10, 15:24
Re: When and who move the reduce output file part-0000X to the final output directory - MapReduce - [mail # user]
...The task itself moves it when it receives a commitTask message. See the OutputCommitter class: http://hadoop.apache.org/docs/current/api/org/apache/hadoop/mapred/OutputCommitter.html#commitT...
   Author: Harsh J, 2013-05-10, 05:26
Re: Hadoop Maven Build Fails - MapReduce - [mail # user]
...If you're also interested in tracking the issue to make it work with 2.5+ protobuf versions, please follow https://issues.apache.org/jira/browse/HADOOP-9346.  On Thu, May 9, 2013 at 2:0...
   Author: Harsh J, 2013-05-09, 06:02
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