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From "Eric Newton (JIRA)" <j...@apache.org>
Subject [jira] [Created] (ACCUMULO-3999) monitor status collection should be done in parallel
Date Tue, 15 Sep 2015 19:41:46 GMT
Eric Newton created ACCUMULO-3999:
-------------------------------------

             Summary: monitor status collection should be done in parallel
                 Key: ACCUMULO-3999
                 URL: https://issues.apache.org/jira/browse/ACCUMULO-3999
             Project: Accumulo
          Issue Type: Improvement
          Components: master
         Environment: very large cluster
            Reporter: Eric Newton
            Assignee: Eric Newton
             Fix For: 1.8.0


The master collects statistics every few seconds from all the tservers so that it has up-to-date
statistics to hand to the balancer.  It does this one server at a time.  On a very large cluster,
the status collection can take a long time, causing the monitor to show "blocky" statistics
in the graphs, and long "last contact" times in the tablet server lists.

A small thread pool could be used to speed up this simple work.



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