hbase version: 0.90.0, 0.90.1
My cluster is 5 RS and 1 hmaster , I create table with multiple regions(50
regions per RS)
the parallel is improved, but when the one RS is restarted.
it may be a large number of adjacent regions is reassigned to the restarted one.
it reduce the parallelism.
eg:
inital:
RS1 RS2 RS3 RS4 RS5
Region [ a] [a,b] [b,c] [c,d] [d,f]
[f ,g] [g,h] .... ... ....
RS2 restart:
RS1 RS2 RS3 RS4 RS5
Region ... [ a] ... ... ...
[b c]
[c d]
[d,f]
....
why doesn't it improve the method of balanceCluster ?
which can get list of regionsToMove using random fashion instead of order
fashion
or add a configure parameter?
