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[MAPREDUCE-1484] Framework should not sort the input splits - MapReduce - [issue]
...Currently the framework sorts the input splits by size before the job is submitted. This makes it very difficult to run map only jobs that transform the input because the assignment of input...
http://issues.apache.org/jira/browse/MAPREDUCE-1484    Author: Owen O'Malley, 2010-03-04, 02:05
[MAPREDUCE-238] OutputFormat should be given the reduce id directly rather than a filename - MapReduce - [issue]
...The OutputFormat API should be changed to be more evolution proof:public interface OutputFormatContext {  JobConf getJobConf();  Progressable getProgress();}public interf...
http://issues.apache.org/jira/browse/MAPREDUCE-238    Author: Owen O'Malley, 2010-02-11, 06:20
Re: Strange behaviour from a custom Writable - MapReduce - [mail # user]
...On Feb 8, 2010, at 9:37 PM, Amogh Vasekar wrote:    As previously mentioned, if you are trying to sort the values, please   refer to the secondary sort example. It shows how t...
   Author: Owen O'Malley, 2010-02-09, 15:50
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
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
[MAPREDUCE-103] The TaskTracker's shell environment should not be passed to the children. - MapReduce - [issue]
...HADOOP-2838 and HADOOP-5981 added support to make the TaskTracker's shell environment available to the tasks. This has two problems:  1. It makes the task tracker's environment par...
http://issues.apache.org/jira/browse/MAPREDUCE-103    Author: Owen O'Malley, 2009-11-11, 09:23
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
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