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Re: is time sync required among all nodes? - MapReduce - [mail # user]
...Skew in time between nodes is highly confusing, even if not a problem to the runtime. I'd strongly recommend running a time sync service for operational sanity.  On Wed, Jun 5, 2013 at ...
   Author: Harsh J, 2013-06-05, 05:59
[expand - 1 more] - Re: Types and SequenceFiles - MapReduce - [mail # user]
...Ah, sorry I didn't read the exact problem.  Yes that static call you make to addInputPath goes all the way up to (inheritance!) FileInputFormat.addInputPath, which just adds input paths...
   Author: Harsh J, 2013-05-31, 16:10
Re: MapReduce on Local FileSystem - MapReduce - [mail # user]
...Then why not simply run with Write Replication Factor set to 1?  On Fri, May 31, 2013 at 12:54 PM, Agarwal, Nikhil  wrote:    Harsh J...
   Author: Harsh J, 2013-05-31, 07:25
Re: Reduce side question on MR - MapReduce - [mail # user]
...I don't see a direct question asked, but here's a condition in the source code you want to take a look at (*): https://github.com/apache/hadoop-common/blob/branch-1/src/mapred/org/apache/had...
   Author: Harsh J, 2013-05-30, 11:31
Re: NM/AM interaction - MapReduce - [mail # user]
...All AuxiliaryServices are configured in yarn-site.xml with a service ID and a class is associated to the defined service ID. For MR2, one generally adds the two below properties, first defin...
   Author: Harsh J, 2013-05-29, 02:24
Re: Mapreduce queues - MapReduce - [mail # user]
...Can you rephrase your question to include definitions of what you mean by 'queues' and what you mean by 'clusters'?  On Wed, May 22, 2013 at 7:22 PM, Pedro Sá da Costa  wrote: &nbs...
   Author: Harsh J, 2013-05-27, 07:36
Re: HTTP file server, map output, and other files - MapReduce - [mail # user]
...YARN has a ShuffleHandler plugin used for MR purposes, but the APIs used here aren't "general"/public so you'd have to build your own utilities to do that. Its not too difficult to achieve b...
   Author: Harsh J, 2013-05-24, 06:43
Re: Hadoop 2.0.4: Unable to load native-hadoop library for your platform - MapReduce - [mail # user]
...The native libraries packed in a binary tarball of 2.0.4 may not apply to all OSes and architectures. You will need to build your own native libraries to make sure they are appropriate for y...
   Author: Harsh J, 2013-05-24, 06:24
Re: pauses during startup (maybe network related?) - MapReduce - [mail # user]
...You are spot on about the DNS lookup slowing things down. I've faced the same issue (before I had a local network DNS set up for the WiFi network I use).   There's a few configs you nee...
   Author: Harsh J, 2013-05-24, 05:29
Re: Task attempt failed after TaskAttemptListenerImpl ping - MapReduce - [mail # user]
...Assuming you mean "failed" there instead of "filed".  In MR, a ping message is sent over the TaskUmbilicalProtocol from the Task container to the MR AM. A ping is only sent as an altern...
   Author: Harsh J, 2013-05-24, 05:24
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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