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From "Ewan Higgs (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-15384) distcp numListstatusThreads option doesn't get to -delete scan
Date Mon, 02 Jul 2018 13:21:00 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-15384?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16529875#comment-16529875
] 

Ewan Higgs commented on HADOOP-15384:
-------------------------------------

The code LGTM. Trying to test this to see if there is a significant performance impact on
S3.

> distcp numListstatusThreads option doesn't get to -delete scan
> --------------------------------------------------------------
>
>                 Key: HADOOP-15384
>                 URL: https://issues.apache.org/jira/browse/HADOOP-15384
>             Project: Hadoop Common
>          Issue Type: Sub-task
>          Components: tools/distcp
>    Affects Versions: 3.1.0
>            Reporter: Steve Loughran
>            Assignee: Steve Loughran
>            Priority: Major
>         Attachments: HADOOP-15384-001.patch
>
>
> The distcp {{numListstatusThreads}} option isn't used when configuring the GlobbedCopyListing
used in {{CopyComitter.deleteMissing()}}
> This means that for large scans of object stores, performance is significantly worse.
> Fix: pass the option down from the task conf



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