[ http://issues.apache.org/jira/browse/HADOOP-229?page=all ]
Doug Cutting resolved HADOOP-229:
---------------------------------
Fix Version: 0.3
Resolution: Fixed
> hadoop cp should generate a better number of map tasks
> ------------------------------------------------------
>
> Key: HADOOP-229
> URL: http://issues.apache.org/jira/browse/HADOOP-229
> Project: Hadoop
> Type: Bug
> Components: fs
> Reporter: Yoram Arnon
> Assignee: Milind Bhandarkar
> Priority: Minor
> Fix For: 0.3
>
> hadoop cp currently assigns 10 files to copy per map task.
> in case of a small number of large files on a large cluster (say 300 files of
> 30GB each on a 300 node cluster), this results in long execution times.
> better would be to assign files per task such that the entire cluster is
> utilized: one file per map, with a cap of 10000 maps total, so as not to over
> burden the job tracker.
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