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From "dhruba borthakur (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-487) HDFS should expose a fileid to uniquely identify a file
Date Mon, 09 May 2011 18:52:03 GMT

    [ https://issues.apache.org/jira/browse/HDFS-487?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13030856#comment-13030856
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dhruba borthakur commented on HDFS-487:
---------------------------------------

Hi Tigran, thanks for doing this. As you rightly pointed out, hdfs will need to support a
persistent fileid for a file. If you are interested in implementing this, you could follow
the steps outlined in http://wiki.apache.org/hadoop/HowToContribute. For a big feature like
this, a good way to start is with a requirements and design document.

> HDFS should expose a fileid to uniquely identify a file
> -------------------------------------------------------
>
>                 Key: HDFS-487
>                 URL: https://issues.apache.org/jira/browse/HDFS-487
>             Project: Hadoop HDFS
>          Issue Type: New Feature
>            Reporter: dhruba borthakur
>            Assignee: dhruba borthakur
>         Attachments: fileid1.txt
>
>
> HDFS should expose a id that uniquely identifies a file. This helps in developing  applications
that work correctly even when files are moved from one directory to another. A typical use-case
is to make the Pluggable Block Placement Policy (HDFS-385) use fileid instead of filename.

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