This utility can only be run by the user who initialized the cluster because it requires read access to the data directory. You can specify the data directory on the command line, or use the environment variable PGDATA. This utility supports the options -V and --version, which print the pg_controldata version and exit. It also supports options -? and --help, which output the supported arguments.

Note

The following description applies only to Postgres-XC

To print information of each Datanode and Coordinator, you should issue pg_controldata against each of them.