Scalability & Resilience Design

In this lesson, we'll dive into designing Erlang/OTP applications that are not just functional, but also scalable, resilient, and highly available.

• Scalability: The ability to handle increasing workload by adding resources.
• Resilience: The capacity to recover from failures and maintain functionality.
• High Availability: Ensuring the system is operational for a high percentage of the time.

These are crucial for any modern distributed system.

Erlang and OTP provide powerful primitives that naturally support these design goals:

• Lightweight Processes: Millions can run concurrently, allowing fine-grained isolation.
• Message Passing: Processes communicate asynchronously, preventing shared state issues.
• Fault Tolerance: Supervisors automatically restart failed processes, making systems self-healing.

Understanding these strengths is key to building robust architectures.