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Re: Does the class of the Mapper output need to match the exact class of the specified output? - MapReduce - [mail # user]
...On Jan 26, 2010, at 5:17 PM, Wilkes, Chris wrote:   For Writables, the simple answer is yes. It happens because the way   you deserialize is to:  Writable obj = ReflectionUtil...
   Author: Owen O'Malley, 2010-02-02, 16:18
Re: Moving HDFS raid package from HDFS repository to MAPREDUCE repository - MapReduce - [mail # dev]
...The issue is that we need to avoid loops in the project dependencies. Therefore, the order has to go:  Common <- HDFS <- MapReduce  The problem is that RAID needs MapReduce a...
   Author: Owen O'Malley, 2010-01-22, 22:28
Re: Only running hadoop Map tasks - MapReduce - [mail # user]
...On Jan 5, 2010, at 9:13 AM, psdc1978 wrote:   Set the number of reduce tasks to 0.   Each map's unsorted output will be sent to the OutputFormat, which   writes it to the outp...
   Author: Owen O'Malley, 2010-01-05, 18:32
Security design document - MapReduce - [mail # dev]
...All,     As I've mentioned in my talks at Hadoop World and ApacheCon US, we   are working on putting security into Hadoop. Our goal is to have it   done in February 2010....
   Author: Owen O'Malley, 2009-12-18, 22:17
[expand - 1 more] - Re: Ideas for dynamic change reducer task number ? - MapReduce - [mail # dev]
...On Nov 22, 2009, at 4:48 PM, Jeff Zhang wrote:   You misunderstand. I meant doing something like:  public class MyInputFormat ....     public InputSplit[] getSplits(JobCo...
   Author: Owen O'Malley, 2009-11-23, 17:19
Post-5107 cross-project commits - MapReduce - [mail # dev]
...I've committed HADOOP-5107 to Common and HDFS. MapReduce will follow   soon.  There are a couple of things that change:  1. The non-release version names move to the Maven-fri...
   Author: Owen O'Malley, 2009-10-30, 23:59
[expand - 1 more] - Re: DefaultCodec vs. LZO - MapReduce - [mail # user]
...On Oct 23, 2009, at 1:56 PM, Jeff Hammerbacher wrote:   Could Todd submit the packaging stuff as a patch to  http://code.google.com/p/hadoop-gpl-compression/  rather than havi...
   Author: Owen O'Malley, 2009-10-23, 21:10
Welcome Konstantin Boudnik as a qa committer! - MapReduce - [mail # dev]
...The Hadoop PMC has voted to make Cos a QA committer on Common, HDFS,   and MapReduce. I'd like to welcome Cos as the newest committer.  ...
   Author: Owen O'Malley, 2009-10-05, 23:06
Re: [VOTE] Commit MAPREDUCE-728 to Hadoop 0.21 - MapReduce - [mail # dev]
...On Sep 18, 2009, at 10:24 PM, Hong Tang wrote:   Mumak has already found a couple bugs in map/reduce and promises to   find more. I think this is a good low-risk addition to 0.21. ...
   Author: Owen O'Malley, 2009-09-21, 17:23
Hadoop Common, HDFS, and Map/Reduce 0.21 branched - MapReduce - [mail # dev]
...All,     I have branched Common, HDFS, and Map/Reduce 0.21. From now on,   you either need a vote to commit or it needs to be a critical bug. If   you have a question, pl...
   Author: Owen O'Malley, 2009-09-19, 01:33
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