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From "Thomas Marquardt (JIRA)" <j...@apache.org>
Subject [jira] [Reopened] (HADOOP-15547) WASB: improve listStatus performance
Date Sat, 01 Sep 2018 00:42:00 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-15547?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Thomas Marquardt reopened HADOOP-15547:
---------------------------------------

Reactivating for branch-2 backport.

> WASB: improve listStatus performance
> ------------------------------------
>
>                 Key: HADOOP-15547
>                 URL: https://issues.apache.org/jira/browse/HADOOP-15547
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: fs/azure
>    Affects Versions: 2.9.1, 3.0.2
>            Reporter: Thomas Marquardt
>            Assignee: Thomas Marquardt
>            Priority: Major
>             Fix For: 3.1.1
>
>         Attachments: HADOOP-15547-004.patch, HADOOP-15547-004.patch, HADOOP-15547.001.patch,
HADOOP-15547.002.patch, HADOOP-15547.003.patch
>
>
> The WASB implementation of Filesystem.listStatus is very slow due to O(n!) algorithm
to remove duplicates and uses too much memory due to the extra conversion from BlobListItem
to FileMetadata to FileStatus.  It takes over 30 minutes to list 700,000 files.  



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