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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-3650) Use MutableQuantiles to provide latency histograms for various operations
Date Fri, 27 Jul 2012 00:44:35 GMT

    [ https://issues.apache.org/jira/browse/HDFS-3650?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13423594#comment-13423594
] 

Hudson commented on HDFS-3650:
------------------------------

Integrated in Hadoop-Common-trunk-Commit #2525 (See [https://builds.apache.org/job/Hadoop-Common-trunk-Commit/2525/])
    HDFS-3650. Use MutableQuantiles to provide latency histograms for various operations.
Contributed by Andrew Wang. (Revision 1366246)

     Result = SUCCESS
atm : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1366246
Files : 
* /hadoop/common/trunk/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/conf/Configuration.java
* /hadoop/common/trunk/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/metrics2/lib/MutableQuantiles.java
* /hadoop/common/trunk/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/net/SocketOutputStream.java
* /hadoop/common/trunk/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/metrics2/lib/TestMutableMetrics.java
* /hadoop/common/trunk/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/test/MetricsAsserts.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/DFSConfigKeys.java
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/DFSOutputStream.java
* /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/main/java/org/apache/hadoop/hdfs/server/namenode/metrics/NameNodeMetrics.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/hdfs/server/datanode/TestDataNodeMetrics.java
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/metrics/TestNameNodeMetrics.java

                
> Use MutableQuantiles to provide latency histograms for various operations
> -------------------------------------------------------------------------
>
>                 Key: HDFS-3650
>                 URL: https://issues.apache.org/jira/browse/HDFS-3650
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>    Affects Versions: 2.0.0-alpha
>            Reporter: Andrew Wang
>            Assignee: Andrew Wang
>             Fix For: 2.2.0-alpha
>
>         Attachments: hdfs-3650-1.patch, hdfs-3650-2.patch, hdfs-3650-3.patch
>
>
> MutableQuantiles provide accurate estimation of various percentiles for a stream of data.
Many existing metrics reported by a MutableRate would also benefit from having these percentiles;
lets add MutableQuantiles where we think it'd be useful.

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