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From "Jean-Daniel Cryans (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-9312) Lower StochasticLoadBalancer's default max run time
Date Thu, 22 Aug 2013 22:53:52 GMT
Jean-Daniel Cryans created HBASE-9312:
-----------------------------------------

             Summary: Lower StochasticLoadBalancer's default max run time 
                 Key: HBASE-9312
                 URL: https://issues.apache.org/jira/browse/HBASE-9312
             Project: HBase
          Issue Type: Bug
    Affects Versions: 0.95.2
            Reporter: Jean-Daniel Cryans
            Assignee: Elliott Clark
             Fix For: 0.98.0, 0.96.0


Three things about the 1 minute it takes to decide if we want to balance or not:

 - 1 minute is also the default socket timeout, so if you call "balancer" in the shell you
often get a SocketTimeoutException back. Bad user experience.
 - Elliott was telling me that we might not even need 1 minute to compute a good balance anyways
because of other improvements. I tested 30 seconds on a badly balanced cluster and it worked
well.
 - I personally think that 1 minute is too much time (Elliott disagrees).

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