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From "Luke Lu (JIRA)" <j...@apache.org>
Subject [jira] Created: (HADOOP-6728) Overhaul metric framework
Date Wed, 28 Apr 2010 02:11:32 GMT
Overhaul metric framework

                 Key: HADOOP-6728
                 URL: https://issues.apache.org/jira/browse/HADOOP-6728
             Project: Hadoop Common
          Issue Type: Improvement
            Reporter: Luke Lu
             Fix For: 0.20.3

Per discussions with Arun, Chris, Hong and Rajiv, et al, we concluded that the current metrics
framework needs an overhaul to:

* Allow multiple plugins for different monitoring systems simultaneously (see also: HADOOP-6508).
* Refresh metrics plugin config without server restart.
** Including filtering of metrics per plugin.
* Support metrics schema for plugins.

The jira will be resolved when core hadoop components (hdfs, mapreduce) are updated to use
the new framework . Updates to external components that use the existing metrics framework
will be tracked by different issues.

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