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From "Tsz Wo (Nicholas), SZE (Updated) (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-2887) Define a FSVolume interface
Date Fri, 03 Feb 2012 11:21:54 GMT

     [ https://issues.apache.org/jira/browse/HDFS-2887?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Tsz Wo (Nicholas), SZE updated HDFS-2887:

    Hadoop Flags: Incompatible change
          Status: Patch Available  (was: Open)

BlockVolumeChoosingPolicy declares the chooseVolume(..) method with FSVolume but FSVolume
is a private API.  The patch is going to change it to use FSVolumeInterface.  In this sense,
this is an incompatible change.
> Define a FSVolume interface
> ---------------------------
>                 Key: HDFS-2887
>                 URL: https://issues.apache.org/jira/browse/HDFS-2887
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: data-node
>            Reporter: Tsz Wo (Nicholas), SZE
>            Assignee: Tsz Wo (Nicholas), SZE
>         Attachments: h2887_20120203.patch
> FSVolume is an inner class in FSDataset.  It is actually a part of the implementation
of FSDatasetInterface.  It is better to define a new interface, namely FSVolumeInterface,
to capture the abstraction.

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