# Comparisons Between ECSs in Resource Pools and ECSs on DeHs

ECSs in resource pools and ECSs on DeHs have almost the same functions except those listed in Table 1.

Table 1 Comparisons between ECSs in resource pools and ECSs on DeHs
Item | Resource Pool ECS | DeH ECS
--- | --- | ---
ECS flavors | Multiple ECS types are supported. For details, see the Elastic Cloud Server User Guide. | The ECSs running on DeHs vary. For details, see section Categories and Types.

Auto recovery

Supported

NOTE:

The ECS supports automatic failover. If the physical server accommodating the ECS becomes faulty, the ECS can be automatically migrated to a properly running physical server, ensuring service continuity.

Supported

NOTE:

If a DeH becomes faulty, the system will select a server from the unprovisioned servers to replace the faulty DeH and automatically migrate the ECSs deployed on the faulty DeH to the new DeH, ensuring high service availability.

Parent topic: Product Introduction