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https://issues.apache.org/jira/browse/HDFS-3343?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13406744#comment-13406744
]
Hudson commented on HDFS-3343:
------------------------------
Integrated in Hadoop-Mapreduce-trunk-Commit #2439 (See
[https://builds.apache.org/job/Hadoop-Mapreduce-trunk-Commit/2439/])
HDFS-3343. Improve metrics for DN read latency. Contributed by Andrew Wang.
(Revision 1356928)
Result = FAILURE
todd : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1356928
Files :
*
/hadoop/common/trunk/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/net/SocketOutputStream.java
* /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/server/datanode/BlockSender.java
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/metrics/DataNodeMetrics.java
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/datanode/TestDataNodeMetrics.java
> Improve metrics for DN read latency
> -----------------------------------
>
> Key: HDFS-3343
> URL: https://issues.apache.org/jira/browse/HDFS-3343
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: data-node
> Reporter: Todd Lipcon
> Assignee: Andrew Wang
> Fix For: 2.0.1-alpha
>
> Attachments: hdfs-3343-2.patch, hdfs-3343-3.patch, hdfs-3343-4.patch,
> hdfs-3343.patch
>
>
> Similar to HDFS-3170 on the write side, we should improve the metrics that
> are generated on the DN for read latency. We should have separate metrics for
> the time spent in {{transferTo}} vs {{waitWritable}} so that it's easy to
> distinguish slow local disks from slow readers on the other end of the socket.
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