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From "Kay Ousterhout (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (SPARK-5845) Time to cleanup intermediate shuffle files not included in shuffle write time
Date Mon, 23 Feb 2015 19:38:11 GMT

     [ https://issues.apache.org/jira/browse/SPARK-5845?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Kay Ousterhout updated SPARK-5845:
----------------------------------
    Assignee: Ilya Ganelin

> Time to cleanup intermediate shuffle files not included in shuffle write time
> -----------------------------------------------------------------------------
>
>                 Key: SPARK-5845
>                 URL: https://issues.apache.org/jira/browse/SPARK-5845
>             Project: Spark
>          Issue Type: Bug
>          Components: Shuffle
>    Affects Versions: 1.3.0, 1.2.1
>            Reporter: Kay Ousterhout
>            Assignee: Ilya Ganelin
>            Priority: Minor
>
> When the disk is contended, I've observed cases when it takes as long as 7 seconds to
clean up all of the intermediate spill files for a shuffle (when using the sort based shuffle,
but bypassing merging because there are <=200 shuffle partitions).  This is even when the
shuffle data is non-huge (152MB written from one of the tasks where I observed this).  This
is effectively part of the shuffle write time (because it's a necessary side effect of writing
data to disk) so should be added to the shuffle write time to facilitate debugging.



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