I logged https://issues.apache.org/jira/browse/HBASE-3943 This seems to be a popular request.
I will wait for other developers' comment first. On Tue, May 31, 2011 at 11:26 PM, Anty <[email protected]> wrote: > On Wed, Jun 1, 2011 at 11:02 AM, Stack <[email protected]> wrote: > > > If compacting, don't we interrupt it so we can close and move the > > region. You are worried about the compacting work done so far -- you > > don't want to lose it? So you are suggesting that a region should be > > able to say "No, not now! I'm busy?" (We'd need to distingush between > > a balancer 'move' and a move or close for any other region). > > > Yes, that's exactly what i want to convey. > Can this consideration be included in balancer? > > > > > St.Ack > > > > On Tue, May 31, 2011 at 7:44 PM, Anty <[email protected]> wrote: > > > When doing balance, Can we take into account the compaction status of > > > regions. > > > Currently, even the region is doing compaction, it can also be > > interrupted > > > to response to reassign. > > > > > > > > > On Sun, May 29, 2011 at 12:57 AM, Schubert Zhang <[email protected]> > > wrote: > > > > > >> Thanks, I think it is HBASE-3373 > > >> > > >> On Fri, May 20, 2011 at 11:33 PM, Ted Yu <[email protected]> wrote: > > >> > > >> > I think your request is described in > > >> > https://issues.apache.org/jira/browse/HBASE-3373 > > >> > > > >> > Practically speaking, the scenario below can hardly occur (in trunk, > > at > > >> > least). > > >> > If the tables are created with pre-split regions, the regions would > be > > >> > round-robin distributed. > > >> > If the tables are created with single region, subsequent write > > operations > > >> > would cause the region split. Balancer would offload young regions > to > > >> other > > >> > servers - see HBASE-3609 > > >> > <https://issues.apache.org/jira/browse/HBASE-3609>which is not in > > 0.90 > > >> > branch. > > >> > > > >> > Refer to > > >> > > > http://zhihongyu.blogspot.com/2011/04/load-balancer-in-hbase-090.htmlfor > > >> > details. > > >> > > > >> > Cheers > > >> > > > >> > On Fri, May 20, 2011 at 12:25 AM, Schubert Zhang <[email protected] > > > > >> > wrote: > > >> > > > >> > > I have a question about HBase balancer. > > >> > > > > >> > > In release 0.90.x, it seems the balancer only regards the number > of > > >> > regions > > >> > > and balance these regions into every regionserver. > > >> > > > > >> > > If we have two tables (A and B) now, each have 100 regions. > > >> > > Then, a extreme situation is: > > >> > > > > >> > > RegionsServer1: 100 regions, which all belong to table A > > >> > > RegionsServer2: 100 regions, which all belong to table B > > >> > > > > >> > > If my application access table B heavy, the almost all opetations > > hit > > >> > > RegionsServer2, it is not balance. > > >> > > > > >> > > I have a idea about the balance policy: > > >> > > (1) Firstly balance for each table > > >> > > (2) Then, overall balance. > > >> > > > > >> > > > > >> > > Schubert > > >> > > > > >> > > > >> > > > > > > > > > > > > -- > > > Best Regards > > > Anty Rao > > > > > > > > > -- > Best Regards > Anty Rao >
