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From "Lars Hofhansl (JIRA)" <j...@apache.org>
Subject [jira] [Comment Edited] (HBASE-14289) Backport HBASE-13965 'Stochastic Load Balancer JMX Metrics' to 0.98
Date Fri, 28 Aug 2015 22:47:47 GMT

    [ https://issues.apache.org/jira/browse/HBASE-14289?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14720718#comment-14720718
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Lars Hofhansl edited comment on HBASE-14289 at 8/28/15 10:47 PM:
-----------------------------------------------------------------

It turns out this break Phoenix compilation, which implements LoadBalancer.
While we can technically break this, this will be hard to fix for Phoenix folks and keep it
all working across multiple versions of Phoenix.

Do we need this in 0.98?

[~samarthjain], [~rajeshbabu], [~giacomotaylor], [~apurtell], [~tedyu@apache.org]



was (Author: lhofhansl):
It turns out this break Phoenix compilation, which subclasses implements LoadBalancer.
While we can technically break this, this will be hard to fix for Phoenix folks and keep it
all working across multiple versions of Phoenix.

Do we need this in 0.98?

[~samarthjain], [~rajeshbabu], [~giacomotaylor], [~apurtell], [~tedyu@apache.org]


> 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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