In CDH4.1.2, per table region balancing is turned off by default. You can change the configuration to turn it on.
Thanks, Jimmy On Tue, Dec 4, 2012 at 11:10 AM, Ted Yu <[email protected]> wrote: > Can you give us a little more detail on how much deviation the region > counts on region servers have ? > > There is a parameter, hbase.regions.slop, with default value of 0.2 > This parameter allows region count to deviate by certain percentage from > average region count. > > You can tighten the value for this parameter and see if you get better > results. > > I will also put the above summary on HBASE-3373. > > Thanks > > On Tue, Dec 4, 2012 at 8:42 AM, Norbert Burger > <[email protected]>wrote: > >> We upgraded to CDH4.1.2 (contains HBASE-3373) in one of our >> environments. After filling that environment with data, I was >> surprised to see that regions were not balanced across regionservers >> at the table level. We have restarted all regionservers at least once >> here. >> >> In [1], I see Stack's reference to temporarily adding >> "hbase.master.startup.retainassign=false" and restarting nodes. Is >> this a necessary step on the path to region balancing nirvana? >> >> Norbert >> >> [1] http://search-hadoop.com/m/MQSPEyUQIv1 >>
