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From "Steve Loughran (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HADOOP-13946) Document how HDFS updates timestamps in the FS spec; compare with object stores
Date Sun, 08 Jan 2017 13:29:58 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-13946?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Steve Loughran updated HADOOP-13946:
------------------------------------
    Status: Patch Available  (was: Reopened)

> Document how HDFS updates timestamps in the FS spec; compare with object stores
> -------------------------------------------------------------------------------
>
>                 Key: HADOOP-13946
>                 URL: https://issues.apache.org/jira/browse/HADOOP-13946
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: documentation, fs
>    Affects Versions: 2.7.3
>            Reporter: Steve Loughran
>            Assignee: Steve Loughran
>            Priority: Minor
>             Fix For: 2.8.0, 3.0.0-alpha2
>
>         Attachments: HADOOP-13946-001.patch, HADOOP-13946-002.patch
>
>
> SPARK-17159 shows that the behavior of when HDFS updates timestamps isn't well documented.
Document these in the FS spec.
> I'm not going to add tests for this, as it is so very dependent on FS implementations,
as in "POSIX filesystems may behave differently from HDFS". If someone knows what happens
there, their contribution is welcome.



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