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[expand - 1 more] - Re: Map Tasks do not obey data locality principle........ - MapReduce - [mail # user]
...Hi Nikhil,  For (1) - Its hard to specifically tell what you may be doing wrong or differently than expected cause I don't have the source to look it up, but do you at least see the JT ...
   Author: Harsh J, 2013-05-16, 06:52
[expand - 1 more] - Re: Question about Name Spaces… - MapReduce - [mail # user]
...Do you see viewfs mounts coming useful there (i.e. in place of hardlinks across NSes)?  On Thu, May 16, 2013 at 3:49 AM, Michael Segel  wrote:    Harsh J...
   Author: Harsh J, 2013-05-16, 05:14
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
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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