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From Ted Yu <yuzhih...@gmail.com>
Subject Re: Region balancing question
Date Thu, 02 Aug 2012 14:32:26 GMT
0.92 doesn't have this feature. The change was rolled back.


On Thu, Aug 2, 2012 at 3:01 AM, Anoop Sam John <anoopsj@huawei.com> wrote:

> Seems this is available from 0.92 version..   See HBASE-3373
> -Anoop-
> ________________________________________
> From: Anoop Sam John [anoopsj@huawei.com]
> Sent: Thursday, August 02, 2012 3:24 PM
> To: user@hbase.apache.org
> Subject: RE: Region balancing question
> Hi
>   Which version you are using?
> From 0.94 in the balancer there are 2 ways of balancing. One is by table
> balancing in which balancer will make sure the regions for one table is
> balanced across the RSs. But in the other way of balancing in generic way
> it will consider all the regions across all the tables as one group only
> and will balance all across the RSs.  Seems the 2nd way is happening with
> ur case. Can u check the total number of regions (across all the tables) in
> every RS. Is this balanced now?
> "hbase.master.loadbalance.bytable" config param can select any of the 2
> ways of balancing. This is added in 0.94 version. You might be using some
> older version?
> -Anoop-
> ________________________________________
> From: Bryan Keller [bryanck@gmail.com]
> Sent: Thursday, August 02, 2012 11:37 AM
> To: user@hbase.apache.org
> Subject: Region balancing question
> I have a table on a 4 node test cluster. I also have some other tables on
> the cluster. The table in question has a total of 12 regions. I noticed
> that 1 node has 6 regions, another has zero, and the remaining two nodes
> have the expected 3 regions. I'm a little confused how this can happen.
> The node with zero regions for the table has regions for other tables, so
> the node seems to be functioning properly. I'm not sure how this particular
> table can end up having no regions on this one node. Should the balancer
> distribute the regions evenly across the cluster for a given table? If so,
> is there a way to force it to rebalance?

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