1.3.1 Restrictions on pg_basebackup

BART takes full backups using the pg_basebackup utility program under the following conditions:

•	The backup is taken on a standby server

•	The --with-pg_basebackup option has been specified with the BACKUP subcommand for forcing the usage of pg_basebackup (see Section 3.4.3).

•	The number of thread counts in effect is 1, and the - pg_basebackup option is not specified with the BACKUP subcommand. See the configuration section of EDB Postgres Backup and Recovery Installation and Upgrade Guide for information about setting the thread_count parameter.

In the global section of the BART configuration file, parameter pg_basebackup_path specifies the complete directory path to the pg_basebackup program. See the configuration section of the EDB Postgres Backup and Recovery Installation and Upgrade Guide for information about this parameter.

For information about pg_basebackup see the PostgreSQL Core Documentation available at:

https://www.postgresql.org/docs/11/static/app-pgbasebackup.html

There are restrictions on using pg_basebackup depending upon the pg_basebackup version and the Postgres database server version.

Database servers can only be backed up by using pg_basebackup of the same or later version than the database server version. For example, pg_basebackup version 9.5 can back up database server version 9.5, but it cannot be used to back up database server version 9.6.