[ http://issues.apache.org/jira/browse/HADOOP-9?page=all ]
Sameer Paranjpye updated HADOOP-9:
----------------------------------
Component/s: mapred
(was: indexer)
> mapred.local.dir temp dir. space allocation limited by smallest area
> ---------------------------------------------------------------------
>
> Key: HADOOP-9
> URL: http://issues.apache.org/jira/browse/HADOOP-9
> Project: Hadoop
> Issue Type: Bug
> Components: mapred
> Environment: all
> Reporter: Paul Baclace
>
> When mapred.local.dir is used to specify multiple temp dir. areas, space
> allocation limited by smallest area because the temp dir. selection algorithm
> is "round robin starting from a randomish point". When round robin is used
> with approximately constant sized chunks, the smallest area runs out of space
> first, and this is a fatal error.
> Workaround: only list local fs dirs in mapred.local.dir with similarly-sized
> available areas.
> I wrote a patch to JobConf (currenly being tested) which uses df to check
> available space (once a minute or less often) and then uses an efficient
> roulette selection to do allocation weighted by magnitude of available space.
--
This message is automatically generated by JIRA.
-
If you think it was sent incorrectly contact one of the administrators:
http://issues.apache.org/jira/secure/Administrators.jspa
-
For more information on JIRA, see: http://www.atlassian.com/software/jira
