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[expand - 1 more] - Re: Running Hadoop on cluster with NFS booted systems - Hadoop - [mail # user]
...Hmm....  I have to say that I haven't used (or heard of problems with) Infiniband.  Just to clarify for myself, did you say here that Hadoop uses the 1Gb network and MPI and NFS us...
   Author: Ted Dunning, 2009-09-29, 00:34
[expand - 1 more] - Re: hadoop fsck through proxy... - Hadoop - [mail # user]
...Indeed.  But that is a different discussion.  I can only address the quotidien aspects of the issue, not the philosophical.  On Thu, Sep 24, 2009 at 1:23 PM, Andy Sautins wrot...
   Author: Ted Dunning, 2009-09-24, 20:25
[expand - 1 more] - Re: Hadoop On Cluster - Hadoop - [mail # user]
...To amplify this point, don't try reading from mySQL with a whole bunch of map tasks either.  It is very impressive how quickly Hadoop can take down a database.  On Wed, Sep 23, 200...
   Author: Ted Dunning, 2009-09-23, 20:04
Re: Re: Processing a large quantity of smaller XML files? - Hadoop - [mail # user]
...If you have a unique id for each file (as you must if you are updating them), then I think you would find it pretty surprising how fast you can merge your old archive file and the updated/ad...
   Author: Ted Dunning, 2009-09-18, 03:37
Re: Need help - Uneven workload distributed to Reducers - Hadoop - [mail # user]
...A better solution is to output a large number of records with keys drawn pseudo-randomly from a large domain of values.  Then records will balance across however many reducers you have....
   Author: Ted Dunning, 2009-09-16, 16:11
[expand - 4 more] - Re: HadoopDB and similar stuff - Hadoop - [mail # user]
...Great description.  On Tue, Sep 15, 2009 at 12:01 PM, Edward Capriolo wrote:      Ted Dunning, CTO DeepDyve...
   Author: Ted Dunning, 2009-09-15, 19:03
Re: Multiple disks for DFS - Hadoop - [mail # user]
...I think that the question confused people.  This is open-source, after all, so you can use the code any way you like.  It sounds like you are asking permission to use the code whic...
   Author: Ted Dunning, 2009-09-15, 16:03
[expand - 1 more] - Re: Decommissioning Individual Disks - Hadoop - [mail # user]
...I think that would be a bit too rude.  The datanode scans the data partition when it comes up.  Better to give it the benefit of a bounce so that it can inform the name node of the...
   Author: Ted Dunning, 2009-09-11, 03:37
Re: HDFS and Linux File System - Hadoop - [mail # user]
...Since hadoop still doesn't have append and small files kill performance, it is difficult to avoid local disk or memory buffering.  On Mon, Sep 7, 2009 at 2:18 AM, Ted Yu  wrote: &n...
   Author: Ted Dunning, 2009-09-07, 16:42
[expand - 2 more] - Re: Pregel - Hadoop - [mail # user]
...Are there any production applications that use Hama?  On Thu, Sep 3, 2009 at 7:07 PM, Edward J. Yoon wrote:     Ted Dunning, CTO DeepDyve...
   Author: Ted Dunning, 2009-09-04, 06:19
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