Key characteristics:
Scalability: Capability of a system, procress or the network to grow and manage increased demand.
Horizontal scaling: Adding more machines to your pool.
Vertical Scaling: Adding more power(CPU, RAM…) to a existing server.
Reliability: Probability that a system will fail in given period.
Availability: Time that a system remain operational during given period.
Efficiency: Generally two standards -> response time(latency) & throughput(bandwidth).
Load balancer: A component that spread traffic across a cluster of servers to improve responsiveness and availability.
- Load balancer can be placed between any two layer in the general 3 layer web application.
