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 <yuzhih...@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.hu...@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 <yuzhih...@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.hu...@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 <yuzhih...@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.hu...@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.yu...@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/
