Forcing hbase.master.loadbalance.bytable=true seems to have resolved my balance issue. Thanks again.
Norbert On Tue, Dec 4, 2012 at 2:56 PM, Jimmy Xiang <[email protected]> wrote: > Right, that's config. You can turn it on and restart the cluster. > > Upstream it is on by default. However, it is turned off by default in > CDH4.1.2 to be backward compatible. > > Thanks, > Jimmy > > On Tue, Dec 4, 2012 at 11:28 AM, Norbert Burger > <[email protected]> wrote: >> Thanks, Jimmy. Do you mean the config >> "hbase.master.loadbalance.bytable"? According to [1] and [2], it is >> "true" by default. >> >> [1] https://issues.apache.org/jira/secure/attachment/12509174/3373.txt >> [2] http://search-hadoop.com/m/M6z7G1PKejw >> >> Norbert >> >> On Tue, Dec 4, 2012 at 2:23 PM, Jimmy Xiang <[email protected]> wrote: >>> 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 >>>>>
