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From "Manoj Govindassamy (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-9063) Correctly handle snapshot path for getContentSummary
Date Wed, 21 Sep 2016 17:21:20 GMT

    [ https://issues.apache.org/jira/browse/HDFS-9063?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15510568#comment-15510568
] 

Manoj Govindassamy commented on HDFS-9063:
------------------------------------------

Hi [~jingzhao],

I am seeing a difference in behavior on the {{Count}} command before and after this fix. {{Count}}
command used to account for {{.snapshot}} directory, but after this fix, _numDirs_ from Count
command is less than expected as it is not including the {{.snapshot}} directory. Is the change
in behavior intended ? Please clarify.





> Correctly handle snapshot path for getContentSummary
> ----------------------------------------------------
>
>                 Key: HDFS-9063
>                 URL: https://issues.apache.org/jira/browse/HDFS-9063
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: namenode
>            Reporter: Jing Zhao
>            Assignee: Jing Zhao
>             Fix For: 2.8.0, 3.0.0-alpha1
>
>         Attachments: HDFS-9063.000.patch
>
>
> The current getContentSummary implementation does not take into account the snapshot
path, thus if we have the following ops:
> 1. create dirs /foo/bar
> 2. take snapshot s1 on /foo
> 3. create a 1 byte file /foo/bar/baz
> then "du /foo" and "du /foo/.snapshot/s1" can report same results for "bar", which is
incorrect since the 1 byte file is not included in snapshot s1.



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