Thats a good point that one of two contiguous regions should be moved on balance. There is HBASE-3373 but I just opened an umbrella balancing issue at HBASE-3724. Would you mind adding your observation there? Thank you Gaojinchao. St.Ack
On Fri, Apr 1, 2011 at 2:39 AM, Gaojinchao <[email protected]> wrote: > In hbase version 0.20.6, If contiguous regions, do not assign adjacent > regions in same region server. So it can break daughters of splits in same > region server and avoid hot spot. The performance can improve. > > In version 0.90.1, daughter is opened in region server that his parent is > opened. > In the case A region server has thousands of regions. the contiguous region > is difficult to > Choose by random. So the region server always is hot spot. > > Should the balance method be choose the contiguous region and then random ? > > . >
