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Posted to mapreduce-issues@hadoop.apache.org by "Allen Wittenauer (JIRA)" <ji...@apache.org> on 2014/07/29 20:44:41 UTC

[jira] [Resolved] (MAPREDUCE-1115) Support hierarchical pools of directories to use for intermediate MapReduce data files (for SSD drives)

     [ https://issues.apache.org/jira/browse/MAPREDUCE-1115?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Allen Wittenauer resolved MAPREDUCE-1115.
-----------------------------------------

    Resolution: Won't Fix

> Support hierarchical pools of directories to use for intermediate MapReduce data files (for SSD drives)
> -------------------------------------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-1115
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-1115
>             Project: Hadoop Map/Reduce
>          Issue Type: Improvement
>          Components: tasktracker
>            Reporter: Amr Awadallah
>            Priority: Minor
>
> Some initial benchmarking shows that SSDs can help a lot for local data files (for shuffle and other intermediate files). 
> Currently mapred.local.dir just round-robins over the provided directories, it would be nice to allocate a set of SSD directories to round-robin across first, then spill over to normal drives if the SSD directories are full.
> -- amr



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