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Date: Fri, 3 Oct 2014 15:30:52 +0800
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Subject: Re: How to make a given table spread evenly across the cluster
From: Qiang Tian <tianq01@gmail.com>
To: "user@hbase.apache.org" <user@hbase.apache.org>
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according to the 2 pictures, looks the balancer not run?

On Fri, Oct 3, 2014 at 1:45 AM, Ted Yu <yuzhihong@gmail.com> wrote:

> 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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