For services with high volume of traffic, such as large portals and mobile app stores, ELB evenly distributes the access traffic to multiple backend servers.
The sticky session feature ensures that requests from a client are forwarded to the same backend server, improving the access efficiency.
For services that have significant traffic peaks, such as e-commerce websites, mobile games, and live websites, deep integration with Auto Scaling (AS) enables ELB to automatically add or remove backend servers as service requirements change, improving service flexibility.
ELB routinely performs health checks on backend servers to monitor their health status. If a backend server becomes faulty, ELB automatically stops distributing incoming traffic to this server, ensuring service continuity.
This makes ELB the right choice for services that require high reliability, such as official websites, toll collection systems, and common web services.
ELB can distribute traffic across AZs. When an AZ becomes faulty, ELB distributes the traffic to backend servers in other AZs that are running properly.
Banking, policing, and large application systems can use ELB to ensure high service availability.