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From "Elliott Clark (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-5959) Add other load balancers
Date Tue, 15 May 2012 22:07:07 GMT

    [ https://issues.apache.org/jira/browse/HBASE-5959?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13276271#comment-13276271
] 

Elliott Clark commented on HBASE-5959:
--------------------------------------

hbase(main):004:0> status
13 servers, 0 dead, 3.6154 average load

hbase(main):005:0> balancer
true                                                                                     
                                                                                         
                                                                                         
                                              
0 row(s) in 3.3460 seconds

hbase(main):006:0> balancer
true                                                                                     
                                                                                         
                                                                                         
                                              
0 row(s) in 3.3530 seconds

hbase(main):007:0> balancer
true                                                                                     
                                                                                         
                                                                                         
                                              
0 row(s) in 3.3160 seconds

hbase(main):008:0> balancer
true                                                                                     
                                                                                         
                                                                                         
                                              
0 row(s) in 3.3850 seconds

hbase(main):009:0> balancer
true                                                                                     
                                                                                         
                                                                                         
                                              
0 row(s) in 3.3580 seconds

hbase(main):010:0> balancer
true                                                                                     
                                                                                         
                                                                                         
                                              
0 row(s) in 3.3190 seconds


The maxSteps config is nice as it places an upper bounds on the time a large cluster will
run the rebalance function.  It also allows people to slowly balance their cluster meaning
that fewer regions will be moved at a time as the cluster approaches the final solution.

                
> 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: HBASE-5959-0.patch, HBASE-5959-1.patch, HBASE-5959-2.patch, HBASE-5959-3.patch,
HBASE-5959-6.patch, HBASE-5959-7.patch, HBASE-5959.D3189.1.patch, HBASE-5959.D3189.2.patch,
HBASE-5959.D3189.3.patch, HBASE-5959.D3189.4.patch
>
>
> Now that balancers are pluggable we should give some options.b

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