Which method of ensuring high availability and data resilience in PostgreSQL would you prefer to use?

To ensure high availability and data resilience in PostgreSQL, replication with automatic failover is often used. The most common method is setting up streaming replication with hot standby servers.

Combined with cluster management tools such as Patroni or repmgr, automatic failover to a standby server in case of primary server failure can be implemented, minimizing downtime.

Architecture example:

• The primary server accepts writes.
• Standby servers receive data in real-time.
• If the primary server fails, one of the standby servers automatically becomes the primary.

This provides:

• High Availability
• Fault tolerance
• Minimal data loss

It is also advisable to consider WAL archiving and regular backups for additional data protection.