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From "Arun C Murthy (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HDFS-974) FileSystem.Statistics should include NN accesses from the clients
Date Fri, 12 Feb 2010 22:54:27 GMT

    [ https://issues.apache.org/jira/browse/HDFS-974?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12833222#action_12833222
] 

Arun C Murthy commented on HDFS-974:
------------------------------------

Maybe I wasn't clear enough, apologies.

The proposal is that we add number of 'read' and 'write' operations on the namesystem. 

The notion of 'read operations' and 'write operations' is fairly generic to all file-systems,
in future we could add more detail by tracking individual operations (open, create, mkdir,
listStatus etc.). Does that sound reasonable?

> FileSystem.Statistics should include NN accesses from the clients
> -----------------------------------------------------------------
>
>                 Key: HDFS-974
>                 URL: https://issues.apache.org/jira/browse/HDFS-974
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: hdfs client
>            Reporter: Arun C Murthy
>            Assignee: Sanjay Radia
>             Fix For: 0.22.0
>
>
> It is a very useful metric to track, we can track per-task and hence per-job stats through
Counters etc.

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