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https://issues.apache.org/jira/browse/HADOOP-6253?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13160891#comment-13160891
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Steve Loughran commented on HADOOP-6253:
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I'd argue strongly against adding any more FS support explicitly into the main 
hadoop distribution, purely on a test+support basis. Anything related to new 
filesystems are welcome, but adding more code that will only be testable on a 
subset of machines is trouble. It's not going to get tested before releases, it 
will ship untested with dependencies on native libraries that most people won't 
have, but there is still an expectation of support.

If that's a strategy we want to take: how to get Ceph support in or near 
hadoop, with enough people caring about it to keep it up to date?
                
> Add a Ceph FileSystem interface.
> --------------------------------
>
>                 Key: HADOOP-6253
>                 URL: https://issues.apache.org/jira/browse/HADOOP-6253
>             Project: Hadoop Common
>          Issue Type: New Feature
>          Components: fs
>            Reporter: Gregory Farnum
>            Assignee: Gregory Farnum
>            Priority: Minor
>              Labels: ceph
>         Attachments: HADOOP-6253.patch, HADOOP-6253.patch, HADOOP-6253.patch, 
> HADOOP-6253.patch, HADOOP-6253.patch
>
>
> The experimental distributed filesystem Ceph does not have a single point of 
> failure, uses a distributed metadata cluster instead of a single in-memory 
> server, and might be of use to some Hadoop users.

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