![]() ![]() Conversely, when there is no activity in the database, WAL file backups are not made. As such, during periods of high amount of transactions, WAL file backups become more frequent. If these files cross a certain file size threshold, they are backed up immediately. Throughout the day, as database transactions occur, WAL files are generated and uploaded.īy default, WAL files are backed up at two minute intervals. On a daily basis, a snapshot of the database is taken and sent to our storage servers. Supabase uses WAL-G, an open source archival and restoration tool, to handle both aspects of PITR. Physical backups provide a snapshot of the underlying directory of the database, while WAL files contain records of every change made in the database. Backup Process #Īs discussed here, PITR is made possible by a combination of taking physical backups of a project, as well as archiving Write Ahead Log (WAL) files. PITR provides a finer granularity than Daily Backups, so it's unnecessary to run both. If you enable PITR, Daily Backups will no longer be taken. With PITR, backups could be performed up to the point of disaster. Even with daily backups, a day's worth of data could still be lost. This provides users an option to restore to any chosen point of up to seconds in granularity. Point-in-Time Recovery (PITR) allows a project to be backed up at much shorter intervals. The Dashboard will display a notification once the restoration completes. The PostgreSQL utility psql is used to facilitate the restoration. Once the confirmation has been given, the underlying SQL of the chosen backup is then run against the project. The larger it is, the longer the downtime will be. ![]() This is dependent on the size of the database. As such, do ensure to allot downtime beforehand. The project will be inaccessible following this. The Dashboard will then prompt for a confirmation before proceeding with the restoration. Earlier backups can always be chosen too but do consider the number of days' worth of data that could be lost. When selecting a backup to restore to, select the closest available one made before the desired point in time to restore to. Users can restore their project to any one of the backups or download them as a zipped SQL file. Pro plan projects can access the last 7 days' worth of daily backups while Enterprise plan projects can access up to 30 days' worth of daily backups. You can access daily backups in the Scheduled backups settings in the Dashboard. An SQL file is generated, zipped up, and sent to our storage servers for safe keeping. The PostgreSQL utility pg_dumpall is used to perform daily backups. As such, if you are restoring from a daily backup and are using custom roles, you will need to set their passwords once more following a completed restoration. The agreed upon RPO would be a deciding factor in choosing which solution best fits a project.įor security purposes, passwords for custom roles are not stored in daily backups, and will not be found in downloadable files. Each Supabase project has access to two forms of backups, Daily Backups and Point-in-Time Recovery (PITR). A low RPO would mean that database backups would have to be taken at an increased cadence throughout the day. This amount is fully dependent on a business and its underlying requirements. RPO is the threshold for how much data, measured in time, a business could lose when disaster strikes. When deciding how often a database should be backed up, the key business metric Recovery Point Objective (RPO) should be considered. When disaster strikes, database backups allow the project to be brought back to any of these points in time, therefore averting the crisis. ![]() They are essentially snapshots of the database at various points in time. Having database backups is a form of insurance policy. The risks and impact brought by these scenarios can never be fully eliminated, but only minimized or even mitigated. It could be as simple as accidentally deleting a table column, the database crashing, or even a natural calamity wiping out the underlying hardware a database is running on. Database backups are an integral part of any disaster recovery plan. ![]()
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