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From "Raghu Angadi (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-2398) Additional Instrumentation for NameNode, RPC Layer and JMX support
Date Tue, 11 Dec 2007 17:40:43 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-2398?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12550652
] 

Raghu Angadi commented on HADOOP-2398:
--------------------------------------

Sanjay,

I haven't looked at the changes yet but the features are pretty neat and very useful. Could
you comment on any overhead? Is it same as Simon stats.. I think Simon stats involved a synchronized
section.


> Additional Instrumentation for NameNode, RPC Layer and JMX support 
> -------------------------------------------------------------------
>
>                 Key: HADOOP-2398
>                 URL: https://issues.apache.org/jira/browse/HADOOP-2398
>             Project: Hadoop
>          Issue Type: New Feature
>          Components: dfs
>            Reporter: Sanjay Radia
>            Assignee: Sanjay Radia
>             Fix For: 0.16.0
>
>         Attachments: metricsPatch6.txt, ScreenShotNameNodeStats.png, ScreenShotRPCStats.png
>
>
> Additional Instrumentation is needed for name node and its rpc layer. Furthermore the
instrumentation should be
> visible via JMX, Java's standard monitoring tool.

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