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From Ted Yu <yuzhih...@gmail.com>
Subject Re: How to make a given table spread evenly across the cluster
Date Thu, 02 Oct 2014 17:45:44 GMT
See also
HBASE-12139 StochasticLoadBalancer doesn't work on large lightly loaded
clusters

Cheers

On Thu, Oct 2, 2014 at 10:35 AM, Jean-Marc Spaggiari <
jean-marc@spaggiari.org> wrote:

> Also, What is the balancer configured on your cluster? Which HBase version?
> If you have a 200 region table in a cluster with another pretty small 13
> region table like the one you have, chances are high for this 2nd table to
> not be perfectly balanced over the cluster compared to the first one.
>
> JM
>
> 2014-10-02 13:30 GMT-04:00 Nick Dimiduk <ndimiduk@gmail.com>:
>
> > Is the balancer running? If it's running but unable to act, you should
> see
> > some explanation in the Master logs.
> >
> > On Wed, Oct 1, 2014 at 8:27 PM, Tao Xiao <xiaotao.cs.nju@gmail.com>
> wrote:
> >
> > > Hi all,
> > >
> > > I have a HBase table containing 40 million records. Checking HBase UI,
> I
> > > could see that this table was not spread evenly across the cluster. Two
> > > nodes, *ec1.hadoop.com:60020 <http://ec1.hadoop.com:60020>* and
> > > *ec5.hadoop.com:60020
> > > <http://ec5.hadoop.com:60020>*, for example, has only one region each,
> > > while other nodes have more regions. Here is the screen shot
> > > <http://imgbin.org/index.php?page=image&id=19571>.
> > >
> > > I tried to split that table by clicking the button "Split". Later, each
> > > region of that table was split into two regions, but all regions for
> that
> > > table as a whole were still unevenly spread across the cluster. Here
> > > is a screen
> > > shot after I click the button "Split"
> > > <http://imgbin.org/index.php?page=image&id=19572>.
> > >
> > > So I'd like to know how to adjust the regions for a table so that all
> > > regions for that table can be evenly spread across the cluster.
> > >
> > > Thanks
> > >
> >
>

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