High Availability, Replication, and Backup Strategies in PostgreSQL
🔁 High Availability & Backup in PostgreSQL
Ensuring PostgreSQL's continuous availability involves implementing replication and backup solutions.
📡 Streaming Replication
Allows real-time data copies from a primary to standby servers.
🛠️ Configuration Example
# postgresql.conf
wal_level = replica
max_wal_senders = 3
# pg_hba.conf
host replication all 192.168.1.0/24 md5
🧬 Logical Replication
Enables selective data replication for specific tables, providing more granular control.
💾 Backup Solutions
- 🧠
pg_dump
: Logical backups - 🗂️ Filesystem snapshots: Physical backups
⏳ Point-in-Time Recovery (PITR)
Uses write-ahead logs (WAL) to restore databases precisely to a given moment in time.
✅ Combining replication with robust backup strategies minimizes downtime and data loss, making it ideal for enterprise-grade deployments.