This topic describes the issues related to Elastic Compute Service (ECS) instances on dedicated hosts and their solutions.

What is the difference between ECS instances that are created on a dedicated host and ECS instances that are created on a shared host?

ECS instances that are created on a dedicated and ECS instances that are created on a shared host differ in the following ways:
  • For functionality, ECS instances that are classic network-connected cannot be created on a dedicated host. For other functional differences, see ECS instances on different hosts.
  • For performance, they are essentially the same. However, the physical resources of the dedicated host are exclusive to you.

What are the limits on the ECS instances that can be created on a dedicated host?

ECS instances that are classic network-connected cannot be created on a dedicated host. The billing method of a dedicated host limits the ECS instance types that you can create. For more information, see Limits.

Can I create different types of ECS instances on the same dedicated host?

Yes, you can create ECS instances of types that match the dedicated host type if the dedicated host has sufficient resources. For example, you can create ECS instances of the sn1ne instance family on a dedicated host of the type Memory Optimized Type with Enhanced Network Performance. However, you cannot create ECS instances of other instance families. For more information about dedicated host types, see Dedicated host types.

Can I create an ECS instance on a specified dedicated host?

Yes, you can create an ECS instance on a specified dedicated host in the ECS console. For more information, see Create an ECS instance on a dedicated host.

Can I migrate ECS instances between different dedicated hosts?

Yes, you can migrate ECS instances between dedicated hosts of the same type, except for dedicated hosts that have local SSD disks attached. For more information, see Migrate ECS instances between different dedicated hosts.

Can I change the configurations of an ECS instance on a dedicated host?

Yes, you can upgrade or downgrade the instance and modify the Internet bandwidth when the configurations of the ECS instance is no longer suitable for your workloads. For more information, see Upgrade or downgrade a subscription ECS instance.