This is the root znode for HBase. Older versions used
to have just /hbase while newer ones distinguish whether cluster is secured or
UUID of the cluster. Also stored in /hbase/hbase.id
file in HDFS.
Contains the active master server hostname.Written
during master server startup.
All standby master servers
are registered here
Registers the hostname of region server which holds
Acts as the root node for all region
servers to list themselves when they start. It is used to track server
failures. Each znode inside is ephemeral and its name is the server name of the
The parent znode for all
Status of load balancer enabled / disabled on cluster.
List of regions in transition.
Read / Write Lock on tables (not on regions inside) during
activities such as Create /delete/alter table , Column add /
The acl znode is used
for synchronizing the changes made to the _acl_ table by the grant/revoke
commands. Each table will have a sub-znode (/hbase/acl/tableName) containing
the ACLs of the table.