When you no longer require rsgroups, you can disable it for your cluster.
Removing RegionServer Grouping for a cluster on which it was enabled involves more
steps in addition to removing the relevant properties from
hbase-site.xml. You must ensure that you clean the RegionServer
grouping-related metadata so that if the feature is re-enabled in the future, the
old metadata will not affect the functioning of the cluster.
To disable RegionServer Grouping:
-
Move all the tables in non-default rsgroups to
default
RegionServer group.
#Reassigning table t1 from the non-default group - hbase shell
hbase> move_tables_rsgroup 'default',['t1']
-
Move all RegionServers in non-default rsgroups to
default
regionserver group.
#Reassigning all the servers in the non-default rsgroup to default - hbase shell
hbase> move_servers_rsgroup 'default',['regionserver1:port','regionserver2:port','regionserver3:port']
-
Remove all non-default rsgroups.
default rsgroup created
implicitly does not have to be removed.
#removing non-default rsgroup - hbase shell
hbase> remove_rsgroup 'mygroup'
-
Remove the changes made in
hbase-site.xml and restart the
cluster.
-
Drop the table
hbase:rsgroup from HBase.
#Through hbase shell drop table hbase:rsgroup
hbase> disable 'hbase:rsgroup'
0 row(s) in 2.6270 seconds
hbase> drop 'hbase:rsgroup'
0 row(s) in 1.2730 seconds
-
Remove the znode
rsgroup from the cluster ZooKeeper using
zkCli.sh.
#From ZK remove the node /hbase/rsgroup through zkCli.sh
rmr /hbase/rsgroup
