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Re: How to add a new node to cluster? - MapReduce - [mail # dev]
...On Mar 5, 2011, at 4:13 AM, 周俊清 wrote:   See Question 6 in the FAQ:  http://wiki.apache.org/hadoop/FAQ  ...
   Author: Allen Wittenauer, 2011-03-18, 00:07
Re: JobTracker memory usage peaks once a day and OOM sometimes - MapReduce - [mail # dev]
...On Feb 8, 2011, at 8:59 AM, Maxim Zizin wrote:   in our Hadoop cluster. JT's heap size is set to 2000m. About 18 hours a da y it uses ~1GB but every day roughly at the minute it was sta...
   Author: Allen Wittenauer, 2011-02-08, 20:16
[expand - 1 more] - Re: any plans to deploy OSGi bundles on cluster? - MapReduce - [mail # user]
...On Jan 4, 2011, at 10:30 AM, Hiller, Dean (Contractor) wrote:   I don't use the JVM re-use options, but I'm 99% certain that the task JVM's  are not shared between jobs.  ...
   Author: Allen Wittenauer, 2011-01-04, 20:08
Re: large intermediate outputs - MapReduce - [mail # user]
...On Jan 3, 2011, at 5:11 AM, Debbie Fu wrote:  op   Not in a way that saves the job.  job   Yes.   You can point it to an NFS mount, but that'd be suicide.   Be...
   Author: Allen Wittenauer, 2011-01-04, 04:32
[expand - 1 more] - Re: Reduce Task Priority / Scheduler - MapReduce - [mail # user]
...This makes sense until you realize:   a) It won't scale.   b) Machines fail.  On Dec 20, 2010, at 5:26 AM, Martin Becker wrote:  ote: rote: view). e:  wrote: ? ce ...
   Author: Allen Wittenauer, 2010-12-20, 19:28
Re: Passing messages - MapReduce - [mail # user]
...On Dec 19, 2010, at 10:21 AM, Eric wrote:  apReduce is designed to have independent mappers and reducers.   Yup.   lf. Say you start your jobs from a work node that has only l...
   Author: Allen Wittenauer, 2010-12-20, 00:01
Re: How to Influence Reduce Task Location. - MapReduce - [mail # user]
...On Dec 19, 2010, at 10:23 AM, Jane Chen wrote:  in nodes.  It will be desirable to schedule the reducer tasks to run on the  nodes local or close to the database nodes.  ...
   Author: Allen Wittenauer, 2010-12-19, 23:59
Re: Scheduler in Hadoop MR - MapReduce - [mail # user]
...On Dec 7, 2010, at 6:47 PM, Harsh J wrote: s   Sure you can.   Configure the task trackers to talk to specific job trackers.   This does,  however, have a very negative i...
   Author: Allen Wittenauer, 2010-12-08, 22:36
Re: Too large class path for map reduce jobs - MapReduce - [mail # user]
...On Sep 17, 2010, at 4:56 AM, Henning Blohm wrote:  rary to previous posts, my problem is not that I am missing classes on the  Task's class path (we have a perfect solution for tha...
   Author: Allen Wittenauer, 2010-09-17, 16:01
Re: hadoop.job.ugi backwards compatibility - MapReduce - [mail # dev]
...On Sep 13, 2010, at 10:05 AM, Todd Lipcon wrote:  nes  an   +1...
   Author: Allen Wittenauer, 2010-09-13, 17:30
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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