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Re: Poor IO performance on a 10 node cluster. - Hadoop - [mail # user]
...It is also worth using dd to verify your raw disk speeds.  Also, expressing disk transfer rates in bytes per second makes it a bit easier for most of the disk people I know to figure ou...
   Author: Ted Dunning, 2011-06-02, 04:05
Re: trying to select technology - Hadoop - [mail # user]
...To pile on, thousands or millions of documents are well within the range that is well addressed by Lucene.  Solr may be an even better option than bare Lucene since it handles lots of t...
   Author: Ted Dunning, 2011-05-31, 18:59
Re: Simple change to WordCount either times out or runs 18+ hrs with little progress - Hadoop - [mail # user]
...itr.nextToken() is inside the if.  On Tue, May 24, 2011 at 7:29 AM,  wrote:  ...
   Author: Ted Dunning, 2011-05-24, 16:24
Re: Hadoop and WikiLeaks - Hadoop - [mail # user]
...ZK started as sub-project of Hadoop.  On Thu, May 19, 2011 at 7:27 AM, M. C. Srivas  wrote:  ...
   Author: Ted Dunning, 2011-05-19, 15:54
Re: matrix-vector multiply in hadoop - Hadoop - [mail # user]
...Try using the Apache Mahout code that solves exactly this problem.  Mahout has a distributed row-wise matrix that is read one row at a time.  Dot products with the vector are compu...
   Author: Ted Dunning, 2011-05-18, 03:10
[expand - 4 more] - Re: Defining Hadoop Compatibility -revisiting- - Hadoop - [mail # general]
...But "distribution Z includes X" kind of implies the existence of some such that X != Y, Y != empty-set and X+Y = Z, at least in common usage.  Isn't that the same as a non-trunk change?...
   Author: Ted Dunning, 2011-05-13, 22:53
[expand - 1 more] - Re: OT: anyone else going to berlin buzzwords? - Hadoop - [mail # general]
...Actually, I just heard from Isabel that there will be a Buzzwords barbecue that evening.  Should we all just meet there and then adjourn for beers after dinner?  On Thu, May 12, 20...
   Author: Ted Dunning, 2011-05-12, 18:12
Re: Suggestions for swapping issue - Hadoop - [mail # user]
...How is it that 36 processes are not expected if you have configured 48 + 12 = 50 slots available on the machine?  On Wed, May 11, 2011 at 11:11 AM, Adi  wrote:  ...
   Author: Ted Dunning, 2011-05-11, 18:16
Re: HDFS - MapReduce coupling - Hadoop - [mail # user]
...Yes.  There is quite a bit of need for the local file system in clustered mode.  For one think, all of the shuffle intermediate files are on local disk.  For another, the dist...
   Author: Ted Dunning, 2011-05-02, 06:56
Re: Applications creates bigger output than input? - Hadoop - [mail # user]
...Cooccurrence analysis is commonly used in recommendations.  These produce large intermediates.  Come on over to the Mahout project if you would like to talk to a bunch of people wh...
   Author: Ted Dunning, 2011-04-30, 20:32
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