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From "Aaron T. Myers (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-4148) Disallow write/modify operations on files and directories in a snapshot
Date Thu, 15 Nov 2012 23:03:12 GMT

    [ https://issues.apache.org/jira/browse/HDFS-4148?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13498422#comment-13498422
] 

Aaron T. Myers commented on HDFS-4148:
--------------------------------------

bq. if this is to add method ensureNotInROSnapshot(INodesInPath) in all the modification related
calls, I think getXAndEnsureMutable is cleaner.

I disagree, but reasonable people can disagree.

bq. FileSystem doesn't have createSysmlink.

Yes indeed. That's why I recommend using FileContext.

bq. I created a follow-up jira HDFS-4189 to address the feedback.

Thanks. I'm watching the JIRA and will review this as soon as you post a patch.
                
>  Disallow write/modify operations on files and directories in a snapshot
> ------------------------------------------------------------------------
>
>                 Key: HDFS-4148
>                 URL: https://issues.apache.org/jira/browse/HDFS-4148
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: name-node
>    Affects Versions: Snapshot (HDFS-2802)
>            Reporter: Brandon Li
>            Assignee: Brandon Li
>             Fix For: Snapshot (HDFS-2802)
>
>         Attachments: HDFS-4148.patch, HDFS-4148.patch, HDFS-4148.patch, HDFS-4148.patch,
HDFS-4148.patch
>
>
> disallow modification on RO snapshots, including create, append, setReplication/Permission/Owner,
rename, delete, makedir, setQuota/Time, createSymlink. 

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