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From "Steve Loughran (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-13600) S3a rename() to copy files in a directory in parallel
Date Tue, 29 Nov 2016 19:57:58 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-13600?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15706370#comment-15706370
] 

Steve Loughran commented on HADOOP-13600:
-----------------------------------------

sahil, unless you object, I'm assigning this to you; I'll help with review & test. I do
like the idea of fault injection via a new s3 client though.

BTW, filed HADOOP-13846; implementing the {{FileSystem.rename(final Path src, final Path dst,
final Rename... options)}} method. That can come after; I'm just thinking it may be the way
to expose exception raising in rename() operations.

> S3a rename() to copy files in a directory in parallel
> -----------------------------------------------------
>
>                 Key: HADOOP-13600
>                 URL: https://issues.apache.org/jira/browse/HADOOP-13600
>             Project: Hadoop Common
>          Issue Type: Sub-task
>          Components: fs/s3
>    Affects Versions: 2.7.3
>            Reporter: Steve Loughran
>            Assignee: Sahil Takiar
>
> Currently a directory rename does a one-by-one copy, making the request O(files * data).
If the copy operations were launched in parallel, the duration of the copy may be reducable
to the duration of the longest copy. For a directory with many files, this will be significant



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