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From "Bill Havanki" <bhava...@clouderagovt.com>
Subject Review Request 19352: ACCUMULO-2488 - refined balance check for concurrent randomwalk
Date Tue, 18 Mar 2014 13:18:32 GMT

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https://reviews.apache.org/r/19352/
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Review request for accumulo and Mike Drob.


Bugs: ACCUMULO-2488
    https://issues.apache.org/jira/browse/ACCUMULO-2488


Repository: accumulo


Description
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The Concurrent randomwalk test used to consider servers unbalanced if any server's tablet
count differed from the cluster average by more than a fifth of the average or by one, whichever
was larger. This would cause failures under typical balancings from the default balancer.

This commit changes the criterion for an unbalanced server to be double the standard deviation
from the cluster average.


Diffs
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  src/server/src/main/java/org/apache/accumulo/server/test/randomwalk/concurrent/CheckBalance.java
d00e2b4 

Diff: https://reviews.apache.org/r/19352/diff/


Testing
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Ran Concurrent randomwalk three times on 7-node cluster.


Thanks,

Bill Havanki


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