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From "girish vaitheeswaran (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-2886) Track individual RPC metrics.
Date Wed, 19 Mar 2008 13:56:29 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-2886?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12580375#action_12580375
] 

girish vaitheeswaran commented on HADOOP-2886:
----------------------------------------------

This patch does not require any new tests.

> Track individual RPC metrics.
> -----------------------------
>
>                 Key: HADOOP-2886
>                 URL: https://issues.apache.org/jira/browse/HADOOP-2886
>             Project: Hadoop Core
>          Issue Type: Improvement
>          Components: metrics
>            Reporter: girish vaitheeswaran
>             Fix For: 0.17.0
>
>         Attachments: rpc-metrics.patch, rpc-metrics.patch, rpc-metrics.path, rpcmetrics.patch,
rpcmetrics.patch
>
>
> There is currently no mechanism to track performance metrics at the granularity of a
specific RPC. So For e.g. if we wanted to capture average latency for the openFile RPC or
for the createFile RPC the current infrastructure does not support that.
> The implementation involves having a simple HashMap where every new Rpc metric being
added would be inserted into the HashMap. Since there is a mechanism to obtain RPC latencies
already (without the name of the specific RPC), the identification of what RPC is involved
would be done by doing a lookup on the HashMap.

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