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From "Ted Yu (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-6730) Enable rolling averages in StochasticLoadBalancer
Date Fri, 07 Sep 2012 22:40:08 GMT

    [ https://issues.apache.org/jira/browse/HBASE-6730?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13451093#comment-13451093
] 

Ted Yu commented on HBASE-6730:
-------------------------------

{code}
+          if (rLoads.size() >= numRegionLoadsToRemember) {
+            rLoads = rLoads.subList(1, numRegionLoadsToRemember);
+          }
{code}
If rLoads.size() > numRegionLoadsToRemember+1, we trim some element(s) off the tail of
the list. Is that desirable ?
                
> Enable rolling averages in  StochasticLoadBalancer
> --------------------------------------------------
>
>                 Key: HBASE-6730
>                 URL: https://issues.apache.org/jira/browse/HBASE-6730
>             Project: HBase
>          Issue Type: Improvement
>            Reporter: Elliott Clark
>            Assignee: Elliott Clark
>             Fix For: 0.96.0
>
>         Attachments: HBASE-6730-1.patch
>
>
> Now that all of the ServerLoad transitions into pb are done.  the load balancer should
get more updates about the current state of the cluster.  This should be used to allow StochasticLoadBalancer
to get rolling averages.

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