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February SF Hadoop Meetup -- Feb 9, 2011 - Hadoop - [mail # general]
...Hadoop fans,  After the successful first edition of the SF Hadoop meetup, we plan to keep the momentum rolling with regular meetups. The second SF Hadoop meetup will be held Wednesday, ...
   Author: Aaron Kimball, 2011-01-20, 20:54
Re: How do I log from my map/reduce application? - Hadoop - [mail # user]
...How is the central log4j file made available to the tasks? After you make your changes to the configuration file, does it help if you restart the task trackers?  You could also try sett...
   Author: Aaron Kimball, 2010-12-16, 01:52
Announcing the first San Francisco Hadoop meetup -- Jan 12, 2011 - Hadoop - [mail # general]
...Hadoop fans,  Earlier in the month I proposed a San Francisco-based Hadoop meetup. We are pleased to announce that we will be holding this event on Wednesday, January 12, 2011 from 6pm ...
   Author: Aaron Kimball, 2010-12-01, 22:37
Re: Branching and testing strategy for 0.22 - Hadoop - [mail # general]
...Would it be worthwhile to give branches unique, persistent names? branch-0.22-qa1, branch-0.22-qa2, etc. Then problems in a later incarnation of the QA branch could be regression-tested agai...
   Author: Aaron Kimball, 2010-08-23, 22:26
Re: problem starting cdh3b2 jobtracker - Hadoop - [mail # general]
...The IOException in MRAsyncDiskService is being logged with severity level WARN; I believe that system operation continues normally despite being unable to clean some of the directories. &nbs...
   Author: Aaron Kimball, 2010-08-06, 17:18
Re: HEP proposal - Hadoop - [mail # general]
...Eli,  Great work. I like where this is going.  Here's something that I think might be problematic:  3. Copyright/public domain -- Each HEP must either be explicitly labelled a...
   Author: Aaron Kimball, 2010-07-15, 01:23
Re: [VOTE] Release Hadoop 0.21.0 (candidate 0) - Hadoop - [mail # dev]
...I downloaded the "combined" tarball of 0.21.0-rc0 and set it up as a pseudo-distributed Hadoop cluster.  Everything seems to work; basic smoke tests pass. Did not run internal unit test...
   Author: Aaron Kimball, 2010-07-08, 18:55
Re: Partitioned Datasets Map/Reduce - Hadoop - [mail # user]
...One possibility: write out all the partition numbers (one per line) to a single file, then use the NLineInputFormat to make each line its own map task. Then in your mapper itself, you will g...
   Author: Aaron Kimball, 2010-07-05, 07:51
Re: create error - Hadoop - [mail # user]
...Is there a reason you're using that particular interface? That's very low-level.  See http://wiki.apache.org/hadoop/HadoopDfsReadWriteExample for the proper API to use.  - Aaron &n...
   Author: Aaron Kimball, 2010-07-05, 07:49
Re: Text files vs. SequenceFiles - Hadoop - [mail # user]
...David,  I think you've more-or-less outlined the pros and cons of each format (though do see Alex's important point regarding SequenceFiles and compression). If everyone who worked with...
   Author: Aaron Kimball, 2010-07-05, 07:47
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