Replication Strategies (Streaming, Logical)
Understand and configure various replication methods like streaming and logical replication for high availability and read scaling.
Why Data Replication?
Imagine your database goes down! Replication is key to preventing data loss and ensuring your application stays online. It creates copies of your database.
It's vital for:
- High Availability (HA): If the main server fails, a copy can take over.
- Read Scaling: Distribute read queries across multiple servers, reducing load on the primary.
The Primary-Replica Setup
The most common replication setup is a Primary-Replica (or Master-Slave) model. One database server acts as the primary, handling all writes.
- Primary: Processes all write operations (INSERT, UPDATE, DELETE).
- Replica(s): Receive copies of data changes from the primary and can serve read-only queries.
This ensures data consistency and offloads read traffic.
All lessons in this course
- Connection Pooling with PgBouncer
- Replication Strategies (Streaming, Logical)
- Sharding and Distributed PostgreSQL
- Read Scaling with Hot Standby and Load Balancing