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https://issues.apache.org/jira/browse/HDFS-6046?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13919472#comment-13919472
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Hudson commented on HDFS-6046:
------------------------------
SUCCESS: Integrated in Hadoop-Mapreduce-trunk #1716 (See
[https://builds.apache.org/job/Hadoop-Mapreduce-trunk/1716/])
HDFS-6046. add dfs.client.mmap.enabled (cmccabe) (cmccabe:
http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1573887)
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/DFSClient.java
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/DFSConfigKeys.java
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/DFSInputStream.java
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/resources/hdfs-default.xml
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/fs/TestEnhancedByteBufferAccess.java
> add dfs.client.mmap.enabled
> ---------------------------
>
> Key: HDFS-6046
> URL: https://issues.apache.org/jira/browse/HDFS-6046
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: hdfs-client
> Affects Versions: 2.4.0
> Reporter: Colin Patrick McCabe
> Assignee: Colin Patrick McCabe
> Fix For: 2.4.0
>
> Attachments: HDFS-6046.001.patch, HDFS-6046.002.patch,
> HDFS-6046.003.patch
>
>
> It would be nice to have a configuration variable, dfs.client.mmap.enabled.
> which would disable mmap reads in the client. This could come in handy for
> debugging or performance benchmarking.
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