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From "Steve Loughran (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (MAPREDUCE-6760) LocatedFileStatusFetcher to use listFiles(recursive)
Date Tue, 05 Sep 2017 09:23:00 GMT

     [ https://issues.apache.org/jira/browse/MAPREDUCE-6760?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Steve Loughran updated MAPREDUCE-6760:
--------------------------------------
    Target Version/s: 3.1.0

> LocatedFileStatusFetcher to use listFiles(recursive)
> ----------------------------------------------------
>
>                 Key: MAPREDUCE-6760
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-6760
>             Project: Hadoop Map/Reduce
>          Issue Type: Improvement
>          Components: mrv2
>    Affects Versions: 2.8.0
>            Reporter: Steve Loughran
>
> {{LocatedFileStatusFetcher}} does parallelized path listing, but it does make recursive
calls on every subdir.
> If we could switch it to use {{FileSystem.listFiles(recursive)}}, object stores that
have high-performance implementations of that operation would see significant speedup.
> HADOOP-13208 implements that for S3A; Azure, swift &c can do the same.



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