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https://issues.apache.org/jira/browse/HDFS-2006?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13040520#comment-13040520
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Konstantin Shvachko commented on HDFS-2006:
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Dhruba, I understand it's a nice thing to have, and that it can be used in many
fashionable ways, and that many file systems have it. But there are other nice
to have features too.
So, I am asking what usage patterns you have in mind for extended attributes?
Why now? If it is per-file-block-placement-policies, then what is it?
> ability to support storing extended attributes per file
> -------------------------------------------------------
>
> Key: HDFS-2006
> URL: https://issues.apache.org/jira/browse/HDFS-2006
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: name-node
> Reporter: dhruba borthakur
> Assignee: dhruba borthakur
>
> It would be nice if HDFS provides a feature to store extended attributes for
> files, similar to the one described here:
> http://en.wikipedia.org/wiki/Extended_file_attributes.
> The challenge is that it has to be done in such a way that a site not using
> this feature does not waste precious memory resources in the namenode.
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