Disable RegionServer grouping

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