Question - What are catalog tables in HBase?
Answer -
The catalog has two tables: hbasemeta and -ROOT-
The catalog table hbase:meta exists as an HBase table and is filtered out of the HBase shell’s list command. It keeps a list of all the regions in the system and the location of hbase:meta is
stored in ZooKeeper. The -ROOT- table keeps track of the location of the .META table.