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Date: Tue, 3 Jan 2017 21:34:58 +0000 (UTC)
From: "Hudson (JIRA)" <jira@apache.org>
To: common-issues@hadoop.apache.org
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Subject: [jira] [Commented] (HADOOP-13946) Document how HDFS updates
 timestamps in the FS spec; compare with object stores
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archived-at: Tue, 03 Jan 2017 21:35:00 -0000


    [ https://issues.apache.org/jira/browse/HADOOP-13946?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15796250#comment-15796250 ] 

Hudson commented on HADOOP-13946:
---------------------------------

SUCCESS: Integrated in Jenkins build Hadoop-trunk-Commit #11065 (See [https://builds.apache.org/job/Hadoop-trunk-Commit/11065/])
HADOOP-13946. Document how HDFS updates timestamps in the FS spec; (liuml07: rev 451efb08fe0680d002c6856c104ebb366acee8a0)
* (edit) hadoop-common-project/hadoop-common/src/site/markdown/filesystem/introduction.md


> 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
>
>
> 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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