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PostgreSQL Backup Tooling

pg_basebackup

Practical pg_basebackup guidance for physical backups, replica bootstrap workflows, and disaster recovery preparation.

Definition

A tool to take a physical base backup of a running PostgreSQL cluster over the replication protocol.

When Teams Use pg_basebackup

pg_basebackup is the canonical PostgreSQL utility for taking physical backups over the replication protocol.

  • Create physical base backups for recovery
  • Initialize streaming replicas
  • Standardize backup workflows in automation

Common Pitfalls

Running pg_basebackup without WAL archive validation leaves hidden gaps in disaster recovery readiness.

Always test full restore + replay in an isolated environment.

Use repeatable scripts and verify permissions, replication slots, and archive destinations.

Operational Best Practices

  • Version-control backup commands and retention policy
  • Alert on backup duration and failure anomalies
  • Use least-privilege service accounts for backup operations

Related Glossary Topics

pgbench pg_dump pg_restore PITR (Point-in-Time Recovery) Physical vs Logical Backup Primary Key Partitioning ACID

Frequently Asked Questions

What does pg_basebackup do?
It creates a physical base backup of a running PostgreSQL cluster and is commonly used for DR backups and replica initialization.
Can pg_basebackup replace WAL archiving?
No. It provides base state only. WAL archiving is needed for PITR and precise recovery.
Is pg_basebackup suitable for large databases?
Yes, but throughput, storage targets, and network planning matter. Restore testing is still mandatory.
Should teams use replication slots with pg_basebackup?
Often yes, to protect required WAL during long backup operations. Monitor slot retention to avoid disk growth.
How do teams validate pg_basebackup readiness?
Run restore drills end to end, including WAL replay and application checks, then compare measured time to RTO.