Day 6: Advanced Storage & Database Patterns

Building Resilient Multi-Region Database Infrastructure

Working Code Demo:

Today's Build Agenda

• Multi-region PostgreSQL cluster with automated failover

• PgBouncer connection pooling for 10x performance improvement

• Automated backup system with point-in-time recovery

• Real-time monitoring dashboard tracking query performance

• Cost optimization engine reducing storage expenses by 40%

Core Concepts: Database Reliability at Scale

When Netflix streams to 200M+ users simultaneously, their database infrastructure doesn't just store data—it orchestrates a complex dance of replication, failover, and performance optimization across continents.

Multi-Region Replication Patterns

Database replication isn't about copying data; it's about managing the fundamental trade-off between consistency, availability, and partition tolerance (CAP theorem).

Primary-Replica Pattern: One master accepts writes, multiple replicas serve reads. Think of it as a newsroom where one editor publishes stories, but multiple local offices distribute them.

Multi-Master Pattern: Multiple nodes accept writes, requiring conflict resolution. Like collaborative document editing where changes must be merged intelligently.

Connection Pooling Architecture