To clone a PostgreSQL database using pg_basebackup, you will need to do the following:
-
On the source database server, enable the
wal_levelandarchive_modesettings in thepostgresql.confconfiguration file. This will enable WAL (Write-Ahead Log) archiving, which is required forpg_basebackupto work. -
Restart the source database server to apply the changes.
-
On the target database server, create a new empty database using the
createdbcommand. -
Run the
pg_basebackuputility on the target database server, specifying the connection information for the source database and the directory where you want to store the backup. For example:
pg_basebackup -h source_host -p 5432 -U postgres -D /var/lib/postgresql/backup
- Once the
pg_basebackuputility has completed, restore the WAL logs from the source database to the target database using thepg_restoreutility. For example:
pg_restore -j 4 -d target_database /var/lib/postgresql/backup
- Verify that the cloned database is working as expected and that all data and schema have been restored correctly.
By following these steps, you should be able to clone a PostgreSQL database using the pg_basebackup utility. This can be a convenient and efficient way to create a copy of an existing database, and can be useful for testing, development, or other purposes. It is recommended that you test the
