Where are Postgres database files stored?
All the data needed for a database cluster is stored within the cluster’s data directory, commonly referred to as PGDATA (after the name of the environment variable that can be used to define it). A common location for PGDATA is /var/lib/pgsql/data.
What is physical and logical backup?
physical backup is to copy for backing up all the physical files that belongs to database. (like data files,control files,log files, executables etc). In logical backup, you don’t take the copies of any physical things,you only extract the data from the data files into dump files. (ex : using export )
How do I find my PostgreSQL database?
Use \l or \l+ in psql to show all databases in the current PostgreSQL server. Use the SELECT statement to query data from the pg_database to get all databases.
How to restore the database in PostgreSQL 9.2?
If you restore the database, which is the same as the one that you made the backup, you can use the following command: pg_restore –dbname=dvdrental –create –verbose c:pgbackupdvdrental.tar Since PostgreSQL 9.2, you could use the –section option to restore table structure only.
How to restore the dvdrental database in PostgreSQL?
You can restore the dvdrental database in tar file format generated by the pg_dump tool in the PostgreSQL backup database tutorial using the following command: pg_restore –dbname=newdvdrental –verbose c:pgbackupdvdrental.tar. If you restore the database, which is the same as the one that you made the backup, you can use the following command:
How to recover Postgres databases from raw physical files?
If you have not got a backup with “pg_dump” and your old data is folder, try the following steps. In the Postgres database, add records to the “pg_database” table. With a manager program or “insert into”. Make the necessary check and change the following insert query and run it. The query will return an OID after it has worked.
Which is the best way to backup PostgreSQL?
Here the best way is to use the snapshots using either File System Level backups or pg_basebackup. This ensures that you do not have to do any manual work and you just need to point to the data directory (after correcting permissions) and you can start your cluster.