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https://issues.apache.org/jira/browse/HADOOP-15384?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16536897#comment-16536897
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Ewan Higgs commented on HADOOP-15384:
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I've tested this using 1, 5, and 20 threads and we get the expected performance
improvement when constructing the source list.
+1
> 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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