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Re: Why mergeParts() is not parallel with collect() on map? - Hadoop - [mail # dev]
...On Tue, May 3, 2011 at 1:48 AM, elton sky  wrote:    No, that isn't a valid assumption. MapReduce workloads can roughly be divided into three categories: 1. scans (map input &...
   Author: Owen O'Malley, 2011-05-03, 15:43
Re: Stable Release - Hadoop - [mail # user]
...On Thu, Apr 28, 2011 at 12:28 PM, Juan P.  wrote:    0.20.2 is the current stable release. I actually rolled a 0.20.3 release candidate, but didn't call a vote on it since 0.2...
   Author: Owen O'Malley, 2011-04-30, 01:35
Re: Applications creates bigger output than input? - Hadoop - [mail # user]
...On Fri, Apr 29, 2011 at 5:02 AM, elton sky  wrote:   As you say, almost all cross join jobs have that property. The other case that almost always fits into that category is generat...
   Author: Owen O'Malley, 2011-04-30, 01:22
[expand - 2 more] - Re: HADOOP-7106: Re-organize hadoop subversion layout - Hadoop - [mail # general]
...On Apr 28, 2011, at 11:24 PM, Todd Lipcon wrote:  infra about it? Do you know how we might clone the SVN repos themselves  to test with?  It looks like there are svn dumps at ...
   Author: Owen O'Malley, 2011-04-29, 18:36
Re: removing old releases - Hadoop - [mail # general]
...On Wed, Apr 27, 2011 at 2:01 PM, Chris Douglas  wrote:    +1 on cleaning it up now. I doubt that there would be any debate that the "current" releases are 0.20.2 and 0.21.0. A...
   Author: Owen O'Malley, 2011-04-27, 22:06
[expand - 1 more] - Re: Does it mean that single disk failure causes the whole datanode to fail? - Hadoop - [mail # user]
...On Tue, Apr 26, 2011 at 6:46 AM, Xiaobo Gu  wrote:    The 0.20.204 version is still being tested. I'd expect a release next month. You can look at the sources at:  http:/...
   Author: Owen O'Malley, 2011-04-26, 14:48
Re: Sequence.Sorter Performance - Hadoop - [mail # user]
...The SequenceFile sorter is ok. It used to be the sort used in the shuffle. *grin*  Make sure to set io.sort.factor and io.sort.mb to appropriate values for your hardware. I'd usually us...
   Author: Owen O'Malley, 2011-04-25, 18:43
Starting 0.20-security-204 branch - Hadoop - [mail # dev]
...I've just created the 0.20-security-204 branch to start the  stabilization process for 0.20.204. I hope to get the 203 branch ready  for a vote next week.  Thanks,   &nbs...
   Author: Owen O'Malley, 2011-04-22, 23:31
Re: Hadoop security branch releases (was Hadoop 0.20.100) - Hadoop - [mail # general]
...Hi all,    I've been doing a bit of travelling, but I'm back now. (Just buried in email, even more than normal.) The general strategy is that the branch (branch-0.20-security) has ...
   Author: Owen O'Malley, 2011-04-15, 15:54
[expand - 1 more] - Re: Hadoop project wins MediaGuardian Innovation Award - Hadoop - [mail # general]
...On Mar 24, 2011, at 4:29 PM, Owen O'Malley wrote:   I've put up some pictures of the event at:  http://developer.yahoo.com/blogs/hadoop/posts/2011/03/hadoop-project-wins-innovation...
   Author: Owen O'Malley, 2011-03-28, 18:28
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