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From "Thomas Marquardt (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-15547) WASB: listStatus performance
Date Mon, 18 Jun 2018 05:43:00 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-15547?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16515368#comment-16515368
] 

Thomas Marquardt commented on HADOOP-15547:
-------------------------------------------

Attaching HADOOP-15547.002.patch with fixes for issues reported by Jenkins.

All tests are passing against my US West storage account:

Tests run: 241, Failures: 0, Errors: 0, Skipped: 11
Tests run: 1, Failures: 0, Errors: 0, Skipped: 0
Tests run: 446, Failures: 0, Errors: 0, Skipped: 55
Tests run: 126, Failures: 0, Errors: 0, Skipped: 10

> WASB: listStatus performance
> ----------------------------
>
>                 Key: HADOOP-15547
>                 URL: https://issues.apache.org/jira/browse/HADOOP-15547
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: fs/azure
>    Affects Versions: 2.9.1, 3.0.2
>            Reporter: Thomas Marquardt
>            Assignee: Thomas Marquardt
>            Priority: Major
>         Attachments: HADOOP-15547.001.patch, HADOOP-15547.002.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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