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From "Andrew Purtell (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-11062) htop
Date Wed, 23 Apr 2014 22:32:15 GMT
Andrew Purtell created HBASE-11062:
--------------------------------------

             Summary: htop
                 Key: HBASE-11062
                 URL: https://issues.apache.org/jira/browse/HBASE-11062
             Project: HBase
          Issue Type: New Feature
            Reporter: Andrew Purtell


A top-like monitor could be useful for testing, debugging, operations of clusters of moderate
size, and possibly for diagnosing issues in large clusters.

Consider a curses interface like the one presented by atop (http://www.atoptool.nl/images/screenshots/genericw.png)
- with aggregate metrics collected over a monitoring interval in the upper portion of the
pane, and a listing of discrete measurements sorted and filtered by various criteria in the
bottom part of the pane. One might imagine a cluster overview with cluster aggregate metrics
above and a list of regionservers sorted by utilization below; and a regionserver view with
process metrics above and a list of metrics by operation type below, or a list of client connections,
or a list of threads, sorted by utilization, throughput, or latency. 

Generically 'htop' is taken but would be distinctive in the HBase context, a utility org.apache.hadoop.hbase.HTop

No need necessarily for a curses interface. Could be an external monitor with a web front
end as has been discussed before. I do like the idea of a process that runs in a terminal
because I interact with dev and test HBase clusters exclusively by SSH. 



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