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From "stack (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HBASE-5959) Add other load balancers
Date Fri, 21 Sep 2012 03:09:07 GMT

     [ https://issues.apache.org/jira/browse/HBASE-5959?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

stack updated HBASE-5959:
-------------------------

    Release Note: 
Added a new StochasticLoadBalancer that when enabled will perform a randomized search for
the optimal cluster balance.  The new balancer takes into account data locality, storefile
size, memstore size, and the evenness of tables over region servers when trying potential
new cluster states.

To enable the new balancer set hbase.master.loadbalancer.class to org.apache.hadoop.hbase.master.balancer.StochasticLoadBalancer
. It is also recommended to set hbase.master.loadbalance.bytable to false .  Lots of different
configuration options can be tuned to prioritize costs differently.  Explanations of all of
the configuration options are available  on the JavaDoc for StochasticLoadBalancer.

StochasticLoadBalancer is the default in 0.96.0

  was:
Added a new StochasticLoadBalancer that when enabled will perform a randomized search for
the optimal cluster balance.  The new balancer takes into account data locality, storefile
size, memstore size, and the evenness of tables over region servers when trying potential
new cluster states.

To enable the new balancer set hbase.master.loadbalancer.class to org.apache.hadoop.hbase.master.balancer.StochasticLoadBalancer
. It is also recommended to set hbase.master.loadbalance.bytable to false .  Lots of different
configuration options can be tuned to prioritize costs differently.  Explanations of all of
the configuration options are available  on the JavaDoc for StochasticLoadBalancer.

    
> Add other load balancers
> ------------------------
>
>                 Key: HBASE-5959
>                 URL: https://issues.apache.org/jira/browse/HBASE-5959
>             Project: HBase
>          Issue Type: New Feature
>          Components: master
>    Affects Versions: 0.96.0
>            Reporter: Elliott Clark
>            Assignee: Elliott Clark
>         Attachments: ASF.LICENSE.NOT.GRANTED--HBASE-5959.D3189.1.patch, ASF.LICENSE.NOT.GRANTED--HBASE-5959.D3189.2.patch,
ASF.LICENSE.NOT.GRANTED--HBASE-5959.D3189.3.patch, ASF.LICENSE.NOT.GRANTED--HBASE-5959.D3189.4.patch,
ASF.LICENSE.NOT.GRANTED--HBASE-5959.D3189.5.patch, ASF.LICENSE.NOT.GRANTED--HBASE-5959.D3189.6.patch,
ASF.LICENSE.NOT.GRANTED--HBASE-5959.D3189.7.patch, HBASE-5959-0.patch, HBASE-5959-11.patch,
HBASE-5959-12.patch, HBASE-5959-13.patch, HBASE-5959-14.patch, HBASE-5959-1.patch, HBASE-5959-2.patch,
HBASE-5959-3.patch, HBASE-5959-6.patch, HBASE-5959-7.patch, HBASE-5959-8.patch, HBASE-5959-9.patch
>
>
> Now that balancers are pluggable we should give some options.

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