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From "Steve Loughran (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HADOOP-13946) Document how HDFS updates timestamps in the FS spec; compare with object stores
Date Tue, 03 Jan 2017 14:44:58 GMT
Steve Loughran created HADOOP-13946:
---------------------------------------

             Summary: 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


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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