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Paul Baclace commented on HADOOP-9: ----------------------------------- Ari, This issue was originally NUTCH-181 before Hadoop was split off. I wrote a patch Dec. 29 2005 and used it at archive.org Jan-Feb 2006. Looking at my old notes, I created this issue on Jan. 11 2006, and prepared the patch on Feb. 28 2006, but it was either lost in a Jira transition or the attachment somehow failed. When I looked at your patch yesterday, it was similar enough to what I remembered (5 years ago) that I thought it must be a revision of the patch I did. Today I found my source and 2005-2006 work notes and it is clear that you implemented the change without seeing mine. Thanks for doing it in same "roulette-y" spirit of my lost patch! > mapred.local.dir temp dir. space allocation limited by smallest area > --------------------------------------------------------------------- > > Key: HADOOP-9 > URL: https://issues.apache.org/jira/browse/HADOOP-9 > Project: Hadoop Common > Issue Type: Bug > Environment: all > Reporter: Paul Baclace > Assignee: Ari Rabkin > Priority: Minor > Fix For: 0.19.0 > > Attachments: hadoop9.patch > > > 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. - You can reply to this email to add a comment to the issue online.