[
https://issues.apache.org/jira/browse/HBASE-8119?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13603052#comment-13603052
]
Enis Soztutar commented on HBASE-8119:
--------------------------------------
After I deleted other 5 tables, which span ~175 regions, StochasticLoadBalancer
was able to run in 26 sec, and after that regions are balanced.
{code}
2013-03-15 03:05:41,943 DEBUG
org.apache.hadoop.hbase.master.balancer.StochasticLoadBalancer: Finished
computing new laod balance plan. Computation took 26904ms to try 15000
different iterations. Found a solution that moves 196 regions; Going from a
computed cost of 65.70466155810982 to a new cost of 14.744572158365262
{code}
{code}
server1 Fri Mar 15 03:02:12 UTC 2013 16041.0 52
server2 Fri Mar 15 03:02:12 UTC 2013 15785.0 52
server3 Fri Mar 15 03:02:13 UTC 2013 16667.0 52
server4 Fri Mar 15 03:02:13 UTC 2013 21632.0 53
server5 Fri Mar 15 03:02:13 UTC 2013 16974.0 52
Total:5 87099 261
{code}
> StochasticLoadBalancer does not take into account per table balance
> -------------------------------------------------------------------
>
> Key: HBASE-8119
> URL: https://issues.apache.org/jira/browse/HBASE-8119
> Project: HBase
> Issue Type: Bug
> Components: Region Assignment
> Affects Versions: 0.95.0
> Reporter: Enis Soztutar
> Fix For: 0.95.0
>
>
> On a 5 node trunk cluster, I ran into a weird problem with
> StochasticLoadBalancer:
> server1 Thu Mar 14 03:42:50 UTC 2013 0.0 33
> server2 Thu Mar 14 03:47:53 UTC 2013 0.0 34
> server3 Thu Mar 14 03:46:53 UTC 2013 465.0 42
> server4 Thu Mar 14 03:47:53 UTC 2013 11455.0 282
> server5 Thu Mar 14 03:47:53 UTC 2013 0.0 34
> Total:5 11920 425
> Notice that server4 has 282 regions, while the others have much less. Plus
> for one table with 260 regions has been super imbalanced:
> {code}
> Regions by Region Server
> Region Server Region Count
> http://server3:60030/ 10
> http://server4:60030/ 250
> {code}
--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators
For more information on JIRA, see: http://www.atlassian.com/software/jira
