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From "Steve Loughran (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-6253) Add a Ceph FileSystem interface.
Date Sat, 13 Jul 2013 15:31:52 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-6253?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13707765#comment-13707765

Steve Loughran commented on HADOOP-6253:

Noah, I've been doing work in HADOOP-9361 both with trying to specify more rigorously what
HDFS does (and hence what other filesystems need to do), and doing some more contract-driven
testing. It'd be great if you could help w/ spec and see how the tests work.

One thing that we may want to think about is adding some declarations of different filesystems
into {{core-default.xml}}, but with a config option to provide a URL to include in any diagnostics
message if the FS class doesn't load, e.g. {{"ClassNotFoundException: failed to load ceph://fs/file
-please see http://ceph.com/docs/wip-hadoop-doc/cephfs/hadoop/ }} for help.

I've opened a JIRA on that,  HADOOP-9727.
> 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,
> 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.
> http://ceph.com/docs/wip-hadoop-doc/cephfs/hadoop/

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