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From "Jean-Marc Spaggiari (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-8868) add metric to report client shortcircuit reads
Date Thu, 04 Jul 2013 13:19:48 GMT

    [ https://issues.apache.org/jira/browse/HBASE-8868?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13700064#comment-13700064
] 

Jean-Marc Spaggiari commented on HBASE-8868:
--------------------------------------------

This will also help to close HBASE-7769... If we have the metric, we can display it in the
UI, which will allow users to see if shortcircuit is used or not...
                
> add metric to report client shortcircuit reads
> ----------------------------------------------
>
>                 Key: HBASE-8868
>                 URL: https://issues.apache.org/jira/browse/HBASE-8868
>             Project: HBase
>          Issue Type: Improvement
>          Components: metrics, regionserver
>    Affects Versions: 0.94.8, 0.95.1
>            Reporter: Viral Bajaria
>            Priority: Minor
>
> With the availability of shortcircuit reads, when the feature is enabled there is no
metric which exposes how many times the regionserver was able to shortcircuit the read and
not make a IPC to the datanode.
> It will be great to add the metric and expose it via Ganglia.

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