Part 4/10:
Achieving high resilience involves multiple layers:
1. Infrastructure Resilience
Multiple Data Centers: Data should be replicated across different geographic regions to prevent single points of failure.
Managed Services: Using cloud providers' managed services (AWS, GCP, Azure) reduces operational burden and improves reliability.
2. Application Resilience
Redundancy: Multiple copies of applications should run in stateless mode, ready to take over if one fails.
Loose Coupling: Components should be loosely coupled to prevent cascading failures.
Graceful Degradation: When a component fails, the system should continue to operate with reduced functionality rather than shutting down entirely.