PostgreSQL backup strategy for small teams
Design a PostgreSQL backup strategy using logical dumps, encrypted storage, retention, monitoring, and restore rehearsals.
Choose a recovery target
Start by deciding how much data loss and downtime the application can tolerate. Periodic logical dumps are portable and straightforward, but their recovery point is the last completed dump. Systems that need point-in-time recovery require a physical backup and write-ahead log strategy in addition to or instead of periodic dumps.
Use database-aware backups
Use PostgreSQL tools such as pg_dump for a single database or pg_dumpall when the recovery plan requires every database and global objects. A database-aware dump produces a consistent logical representation while PostgreSQL is running.
Do not rely on copying a live PostgreSQL data directory as an ordinary filesystem backup. Without the required consistency and write-ahead log handling, the copy may not be recoverable.
Protect and observe each dump
Send dumps into encrypted off-site backup storage and avoid leaving unencrypted exports on disk longer than necessary. Record whether the dump command and the storage backup both succeeded, because either stage can fail independently.
- Alert when an expected backup does not arrive.
- Track output size so unexpectedly empty dumps are visible.
- Keep database credentials out of command logs.
- Retain several generations to survive delayed discovery of corruption.
Rehearse the complete restore
Restore a selected dump into a disposable PostgreSQL instance and run application-level checks. Confirm roles, extensions, ownership, and version compatibility. Measure the duration so the recovery time estimate reflects evidence rather than hope.
Common questions
Frequently asked questions
Is pg_dump safe to run on a live database?
Yes. pg_dump creates a consistent export while the database remains available, although it consumes resources and should be scheduled and monitored on busy systems.
When should I use pg_dumpall?
Use pg_dumpall when you need all databases and cluster-wide objects such as roles. For flexible parallel backup and restore of a large single database, pg_dump's custom or directory formats may be more suitable.
How long should PostgreSQL backups be retained?
Retention depends on recovery and regulatory needs. Keep enough recent and historical generations to cover accidental deletion or corruption that may not be noticed immediately.