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From "Andrew Purtell (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-14289) Backport HBASE-13965 'Stochastic Load Balancer JMX Metrics' to 0.98
Date Sat, 29 Aug 2015 00:44:45 GMT

    [ https://issues.apache.org/jira/browse/HBASE-14289?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14720855#comment-14720855
] 

Andrew Purtell commented on HBASE-14289:
----------------------------------------

For the record I'm uncomfortable with how we've said on this issue we can't make changes to
private code because it breaks Phoenix - as evidenced by reverts once we did. I understand
being 'good neighbors'. That's fine, and we should do that. However this is a slippery slope.
These interfaces are marked private. Phoenix is doing something naughty. Let's get it properly
fixed.

> Backport HBASE-13965 'Stochastic Load Balancer JMX Metrics' to 0.98
> -------------------------------------------------------------------
>
>                 Key: HBASE-14289
>                 URL: https://issues.apache.org/jira/browse/HBASE-14289
>             Project: HBase
>          Issue Type: Improvement
>            Reporter: Ted Yu
>            Assignee: Ted Yu
>             Fix For: 0.98.15
>
>         Attachments: 14289-0.98-v2.txt, 14289-0.98-v3.txt, 14289-0.98-v4.txt, 14289-0.98-v5.txt
>
>
> The default HBase load balancer (the Stochastic load balancer) is cost function based.
The cost function weights are tunable but no visibility into those cost function results is
directly provided.
> This issue backports HBASE-13965 to 0.98 branch to provide visibility via JMX into each
cost function of the stochastic load balancer, as well as the overall cost of the balancing
plan.



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