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From Jianshi Huang <jianshi.hu...@gmail.com>
Subject Re: Help: RegionTooBusyException: failed to get a lock in 60000 ms
Date Mon, 22 Sep 2014 15:29:43 GMT
Hi Ted,

I moved setBalancerRunning before balancer and run them twice. However I
still got highly skewed region distribution.

I guess it's because of the StochasticLoadBalancer, can I assign per-table
balancer class in HBase?


Jianshi

On Mon, Sep 22, 2014 at 9:50 PM, Ted Yu <yuzhihong@gmail.com> wrote:

> admin.setBalancerRunning() call should precede the call to
> admin.balancer().
>
> You can inspect master log to see whether regions are being moved off the
> heavily loaded server.
>
> Cheers
>
> On Mon, Sep 22, 2014 at 1:42 AM, Jianshi Huang <jianshi.huang@gmail.com>
> wrote:
>
> > Hi Ted and others,
> >
> > I did the following after adding splits (without data) to my table,
> however
> > the region is still very imbalanced (one region server has 221 regions
> and
> > other 50 region servers have about 4~8 regions each).
> >
> >       admin.balancer()
> >       admin.setBalancerRunning(true, true)
> >
> > The balancer class in my HBase cluster is
> >
> > org.apache.hadoop.hbase.master.balancer.StochasticLoadBalancer
> >
> > So, is this behavior expected? Can I assign different balancer class to
> my
> > tables (I don't have HBase admin permission)? Which one should I use?
> >
> > I just want HBase to evenly distribute the regions even they don't have
> > data (that's the purpose of pre-split I think).
> >
> >
> > Jianshi
> >
> >
> > On Sat, Sep 6, 2014 at 12:45 AM, Ted Yu <yuzhihong@gmail.com> wrote:
> >
> > > Yes. See the following method in HBaseAdmin:
> > >
> > >   public boolean balancer()
> > >
> > >
> > > On Fri, Sep 5, 2014 at 9:38 AM, Jianshi Huang <jianshi.huang@gmail.com
> >
> > > wrote:
> > >
> > > > Thanks Ted!
> > > >
> > > > Didn't know I still need to run the 'balancer' command.
> > > >
> > > > Is there a way to do it programmatically?
> > > >
> > > > Jianshi
> > > >
> > > >
> > > >
> > > > On Sat, Sep 6, 2014 at 12:29 AM, Ted Yu <yuzhihong@gmail.com> wrote:
> > > >
> > > > > After splitting the region, you may need to run balancer to spread
> > the
> > > > new
> > > > > regions out.
> > > > >
> > > > > Cheers
> > > > >
> > > > >
> > > > > On Fri, Sep 5, 2014 at 9:25 AM, Jianshi Huang <
> > jianshi.huang@gmail.com
> > > >
> > > > > wrote:
> > > > >
> > > > > > Hi Shahab,
> > > > > >
> > > > > > I see, that seems to be the right way...
> > > > > >
> > > > > >
> > > > > > On Sat, Sep 6, 2014 at 12:21 AM, Shahab Yunus <
> > > shahab.yunus@gmail.com>
> > > > > > wrote:
> > > > > >
> > > > > > > Shahab
> > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > > > --
> > > > > > Jianshi Huang
> > > > > >
> > > > > > LinkedIn: jianshi
> > > > > > Twitter: @jshuang
> > > > > > Github & Blog: http://huangjs.github.com/
> > > > > >
> > > > >
> > > >
> > > >
> > > >
> > > > --
> > > > Jianshi Huang
> > > >
> > > > LinkedIn: jianshi
> > > > Twitter: @jshuang
> > > > Github & Blog: http://huangjs.github.com/
> > > >
> > >
> >
> >
> >
> > --
> > Jianshi Huang
> >
> > LinkedIn: jianshi
> > Twitter: @jshuang
> > Github & Blog: http://huangjs.github.com/
> >
>



-- 
Jianshi Huang

LinkedIn: jianshi
Twitter: @jshuang
Github & Blog: http://huangjs.github.com/

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