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From "Eric Yang (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-6919) Metrics2: metrics framework
Date Mon, 28 Feb 2011 23:29:36 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-6919?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13000606#comment-13000606
] 

Eric Yang commented on HADOOP-6919:
-----------------------------------

Thanks for clarified this.  I am assuming when Apache Hadoop 0.22 is released, it is going
to have MetricsContext v1 instead of v2.  HBase depends on the exist hadoop metrics system
(v1).  This means hbase trunk should work with Apache Hadoop 0.22.  When revise for the current
trunk (0.23), could you make sure that MetricsContext is backward compatible?    It would
be good to give them sometime in 0.23 time frame to make the switch.  This ensures that HBase
can release independently, without tie to Hadoop 0.23 release schedule.  Thanks


> Metrics2: metrics framework
> ---------------------------
>
>                 Key: HADOOP-6919
>                 URL: https://issues.apache.org/jira/browse/HADOOP-6919
>             Project: Hadoop Common
>          Issue Type: Sub-task
>          Components: metrics
>    Affects Versions: 0.20.2
>            Reporter: Luke Lu
>            Assignee: Luke Lu
>         Attachments: hadoop-6919-trunk-v1.patch
>
>
> The jira tracks the new metrics framework only changes, i.e., it doesn't track the instrumentation
changes (and compatibility issues) to existing code.

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