VMware Cloud on AWS supports the use of several popular AWS instances as SDDC hosts.

All hosts in a cluster must be of the same type. Some host types might not be available in a particular region or availability zone.

For more about host types available in VMware Cloud on AWS, see the VMware Cloud Tech Zone article SDDC Host Types.
Table 1. VMware Cloud on AWS Host Types
Host Type Cores (Physical/Logical) RAM (GiB) Storage (TiB) * Network Performance (Gbps) **
i3 (Intel Broadwell.) This general-purpose host type provides good balance between compute and storage capabilities for typical workloads at small to medium scale. 36/36 512 10.37 25
i3en (Intel Cascade Lake) This storage-optimized host type is best suited to workloads that require high capacity, high performance storage. 48/96 768 45.84 100
i4i (Intel Ice Lake) This general-purpose host type provides higher levels of compute, memory and storage than the i3 type and is better suited to enterprise applications at larger scale. 64/128 1024 20.46 75

* Storage includes the total per-host available capacity before accounting for any system and RAID overhead, slack space requirements, and excluding gains from compression and deduplication. Actual usable capacity will vary based on these and other factors.

** Network performance in VMware Cloud on AWS depends on a number of factors. Since network performance is defined in gigabytes-per-second (Gbps), throughput is constrained by the average packet-processing performance of the system. Larger packets provide greater throughput, and the network performance numbers shown here assume the use of jumbo frames with full-sized packets across multiple flows. Throughput in SDDC networks varies with traffic direction (internal to the SDDC or between the SDDC and an external endpoint) and is affected by competing traffic sharing the connection, including storage, management, backup and replication, as well as traffic from workloads. More details are available in the VMware Cloud Tech Zone Designlet VMware Cloud on AWS Management Cluster Planning.