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From "dhruba borthakur (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HDFS-504) HDFS updates the modification time of a file when the file is closed.
Date Mon, 03 May 2010 22:40:56 GMT

     [ https://issues.apache.org/jira/browse/HDFS-504?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

dhruba borthakur updated HDFS-504:
----------------------------------

    Fix Version/s: 0.21.0
                       (was: 0.20.1)

This was erroneously marked as fixed in 0.20.1. Actually, it has been fixed in 0.21.

> HDFS updates the modification time of a file when the file is closed.
> ---------------------------------------------------------------------
>
>                 Key: HDFS-504
>                 URL: https://issues.apache.org/jira/browse/HDFS-504
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: name-node
>    Affects Versions: 0.20.1
>            Reporter: Chun Zhang
>            Assignee: Chun Zhang
>            Priority: Minor
>             Fix For: 0.21.0
>
>         Attachments: pathfile.txt, pathfile.txt, pathfile.txt, pathfile.txt
>
>   Original Estimate: 2h
>  Remaining Estimate: 2h
>
> Current HDFS updates the modification time of a file when the file is created. We would
like to update the modification time of the file when the file is closed after being written
to. This helps HDFS Raid to detect file changes more aggressively.
> Solution includes:
> 1. Made changes to closeFile@/org/apache/hadoop/hdfs/server/namenode/FSDirectory.java;
> 2. Added unit test to testTimesAtClose@/org/apache/hadoop/hdfs/TestSetTimes.java.

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