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From "stack (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HBASE-625) Metrics support for cluster load history: emissions and graphs
Date Fri, 17 Oct 2008 00:16:44 GMT

    [ https://issues.apache.org/jira/browse/HBASE-625?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12640385#action_12640385

stack commented on HBASE-625:

If I enable rpc metrics, it shows for each rpc invocation -- openscanner, get, commit, etc.
-- the average time and the number of operations.

> Metrics support for cluster load history: emissions and graphs
> --------------------------------------------------------------
>                 Key: HBASE-625
>                 URL: https://issues.apache.org/jira/browse/HBASE-625
>             Project: Hadoop HBase
>          Issue Type: Improvement
>            Reporter: stack
>            Assignee: stack
>            Priority: Critical
>         Attachments: metrics.patch
> hbase should write loadings on a period in a format that is amenable to tools like ganglia
(rrd).  Master can dump cluster loadings and averages.  Regionservers would report their own
loadings.  Should exploit the work up in hadoop for doing this kinda thing (GangliaContext)
where it makes sense.  Extra browning points if user can optionally enable display of graphs
in the hbase UI (JRobin).

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