Multiple lower-configuration I/O-optimized ECS instances can be used withto deliver a high- availability architecture.

Server Load Balancer (SLB) is a service that distributes network traffic across multiple ECS instances to improve the service capabilities of applications. By using SLB, you can increase the availability and fault tolerance of your applications. You can also use SLB with Auto Scaling to dynamically adjust the number of ECS instances based on the traffic load. Multiple lower-configuration I/O-optimized ECS instances can be used with SLB to deliver a high-availability architecture that can handle traffic spikes and reduce costs.

References:

Alibaba Cloud Server Load Balancer

Alibaba Cloud Elastic Compute Service

ACA Cloud Computing Certification Exam Preparation Course