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Re: kerberos principals per node necessary? - Hadoop - [mail # user]
...For helping manage this, Hadoop lets you specify principles of the format hdfs/_HOST@SOME-REALM. Here _HOST is a special string that Hadoop interprets and replaces it with the local hostname...
   Author: Vinod Kumar Vavilapalli, 2014-02-05, 17:17
Re: what happens to a client attempting to get a new app when the resource manager is already down - Hadoop - [mail # user]
...Is this on trunk or a released version?I think the default behavior (when RM HA is not enabled) shouldn't have client  loop forever. Let me know and we can see if this needs fixing.Than...
   Author: Vinod Kumar Vavilapalli, 2014-02-05, 17:13
[expand - 4 more] - Re: [VOTE] Merge YARN-321 Generic Application History Service to trunk - Hadoop - [mail # dev]
...Yup, I was building and running tests in the branch.ALL CLEAR now. YARN-321 merged. I could build branch-2. Ran all the YARN tests successfully.Let me know if any more issues blow up and/or ...
   Author: Vinod Kumar Vavilapalli, 2014-01-28, 23:38
Re: Invalide URI in job start - Hadoop - [mail # user]
...Need your help to debug this. Seems like the scheme is getting lost somewhere along the way. Clearly as you say if job.jar is on the file-system, then JobClient is properly uploading it. The...
   Author: Vinod Kumar Vavilapalli, 2014-01-27, 19:00
[expand - 1 more] - Re: No space left on device during merge. - Hadoop - [mail # user]
...Yes sampling is a great way to do. That's what is done with the Terasort example. See the code for org.apache.hadoop.examples.terasort.TeraSort and specifically org.apache.hadoop.examples.te...
   Author: Vinod Kumar Vavilapalli, 2014-01-27, 18:47
Re: Does all reducer take input from all NodeManager/Tasktrackers of Map tasks - Hadoop - [mail # user]
...On Jan 27, 2014, at 4:17 AM, Amit Mittal  wrote:Reducers pull map outputs from all the maps. So JobTracker/AppMaster simply give the completion events of *all* the maps to every reducer...
   Author: Vinod Kumar Vavilapalli, 2014-01-27, 17:16
[expand - 1 more] - Re: Memory problems with BytesWritable and huge binary files - Hadoop - [mail # user]
...Okay. Assuming you don't need a whole file (video) in memory for your processing, you can simply write a Inputformat/RecordReader implementation that streams through any given file and proce...
   Author: Vinod Kumar Vavilapalli, 2014-01-24, 22:43
Re: HDFS data transfer is faster than SCP based transfer? - Hadoop - [mail # user]
...Is it a single file? Lots of files? How big are the files? Is the copy on asingle node or are you running some kind of a MapReduce program?+VinodHortonworks Inc.http://hortonworks.com/On Fri...
   Author: Vinod Kumar Vavilapalli, 2014-01-24, 18:19
[expand - 2 more] - Re: Logistics for releasing 2.4 - Hadoop - [mail # dev]
...Can you please send out a separate note so that others who aren't following this thread also know about the change of direction? And update the RoadMap wiki too?+VinodOn Jan 22, 2014, at 6:0...
   Author: Vinod Kumar Vavilapalli, 2014-01-23, 08:10
Re: kerberos for outside threads - Hadoop - [mail # user]
...That is a very appropriate setup. As long as those assumptions remain valid, of course. This was the only way how early hadoop clusters were secured - by restricting access to the cluster us...
   Author: Vinod Kumar Vavilapalli, 2014-01-22, 18:21
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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