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https://issues.apache.org/jira/browse/HDFS-8698?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14611537#comment-14611537
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Chen He commented on HDFS-8698:
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Sorry for the spam, [~joeandrewkey]. I mean [~andreina]. :)
> Add "-direct" flag option for fs copy so that user can choose not to create
> "._COPYING_" file
> ---------------------------------------------------------------------------------------------
>
> Key: HDFS-8698
> URL: https://issues.apache.org/jira/browse/HDFS-8698
> Project: Hadoop HDFS
> Issue Type: New Feature
> Components: fs
> Affects Versions: 2.7.0
> Reporter: Chen He
> Assignee: J.Andreina
>
> Because CLI is using CommandWithDestination.java which add "._COPYING_" to
> the tail of file name when it does the copy. For blobstore like S3 and Swift,
> to create "._COPYING_" file and rename it is expensive. "-direct" flag can
> allow user to avoiding the "._COPYING_" file.
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