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From "Raghu Angadi (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HDFS-487) HDFS should expose a fileid to uniquely identify a file
Date Wed, 15 Jul 2009 18:46:14 GMT

    [ https://issues.apache.org/jira/browse/HDFS-487?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12731617#action_12731617
] 

Raghu Angadi commented on HDFS-487:
-----------------------------------


Given that there is mapping from id to the file, I am not sure if it really works like an
id. Can you explain the use case bit more? (I haven't read the patch for pluggable block placement)

When I first read the title of the jira, thought this might be about file handles...

> 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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