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From "Daryn Sharp (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-2712) setTimes should support only for files and move the atime field down to iNodeFile.
Date Tue, 03 Jan 2012 18:00:41 GMT

    [ https://issues.apache.org/jira/browse/HDFS-2712?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13178872#comment-13178872
] 

Daryn Sharp commented on HDFS-2712:
-----------------------------------

This seems at odds with posix.  I believe a directory's behavior is supposed to:
* atime: creation
* ctime: permissions, owner, group are changed
* mtime: when ctime changes, plus when the contents are altered (path created or deleted)

                
> setTimes should support only for files and move the atime field down to iNodeFile.
> ----------------------------------------------------------------------------------
>
>                 Key: HDFS-2712
>                 URL: https://issues.apache.org/jira/browse/HDFS-2712
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: name-node
>    Affects Versions: 0.23.0, 0.24.0
>            Reporter: Uma Maheswara Rao G
>            Assignee: Uma Maheswara Rao G
>         Attachments: HDFS-2712.patch
>
>
> After the dicussion in HDFS-2436, unsupported behaviour for setTimes was intentional
(HADOOP-1869).
> But current INode structure hierarchy seems, it supports atime for directories also.
But as per HADOOP-1869, we are supporting only for files. To avoid the confusions, we can
move the atime fields to INodeFile as we planned to support setTimes only for files. And also
restrict the support for setTimes on directories ( which is implemented with HDFS-2436 ).

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