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https://issues.apache.org/jira/browse/HDFS-504?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12737209#action_12737209
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Chun Zhang commented on HDFS-504:
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[exec] +1 overall.
[exec]
[exec] +1 @author. The patch does not contain any @author tags.
[exec]
[exec] +1 tests included. The patch appears to include 3 new or
modified tests.
[exec]
[exec] +1 javadoc. The javadoc tool did not generate any warning
messages.
[exec]
[exec] +1 javac. The applied patch does not increase the total number
of javac compiler warnings.
[exec]
[exec] +1 findbugs. The patch does not introduce any new Findbugs
warnings.
[exec]
[exec] +1 release audit. The applied patch does not increase the
total number of release audit warnings.
> 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: 0.20.1
>
> 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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