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Date: Tue, 5 Mar 2013 16:17:11 +0000 (UTC)
From: "Keith Turner (JIRA)" <jira@apache.org>
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Subject: [jira] [Commented] (ACCUMULO-1150) Exponential agitation
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    [ https://issues.apache.org/jira/browse/ACCUMULO-1150?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13593530#comment-13593530 ] 

Keith Turner commented on ACCUMULO-1150:
----------------------------------------

I am thinking of two primamry use cases for this.  If T is the number of tservers, then doing the following two long runs.

 * Run with N=2^ceil(log2(T)-1)
 * Run with N=2^ceil(log2(T))

So in one case it stops short of killing all the tsevers and in the other case it always kills all of the tservers on the last iteration.
                
> Exponential agitation
> ---------------------
>
>                 Key: ACCUMULO-1150
>                 URL: https://issues.apache.org/jira/browse/ACCUMULO-1150
>             Project: Accumulo
>          Issue Type: Improvement
>          Components: test
>            Reporter: Keith Turner
>            Assignee: Keith Turner
>             Fix For: 1.5.0
>
>
> I think modifying the agitator to have an exponential mode would be useful. This would be in addition to its current mode of shutting down between 1 and N servers randomly.
> In exponential mode, it would shut down 1,2,4,8,..N server process where N configurable.  After shutting down N, it would start over at 1.

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