Understanding ECS cluster resources

Before you can start to manage the capacity of your ECS clusters, you need to have a clear and solid understanding of the various resources that affect the capacity of your ECS clusters. 

In general, there are three key resources that you need to consider:

• CPU
• Memory
• Network

CPU resources

CPU is a core resource that Docker supports and manages as a first-class citizen. ECS leverages the CPU resource management capabilities of Docker, and exposes the ability to manage these via your ECS task definitions. ECS defines CPU resources in terms of CPU units, where a single CPU core contains 1,024 CPU units. When you configure your ECS task definitions, you specify a CPU reservation, which...