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https://issues.apache.org/jira/browse/HDFS-487?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12731615#action_12731615
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Tsz Wo (Nicholas), SZE commented on HDFS-487:
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> ... What are the parameters for calculating a UUID?
I mean what parameters should we choose. Obviously, path is needed. Anything
else?
> ... This has some impact on the amount of memory needed by the NN. ...
Ideally, if we can compute the UUID in runtime, no additional memory is needed.
> 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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