instanceTenancy

The allowed tenancy of instances launched into the VPC. "default": An instance launched into the VPC runs on shared hardware by default, unless you explicitly specify a different tenancy during instance launch. "dedicated": An instance launched into the VPC is a Dedicated Instance by default, unless you explicitly specify a tenancy of host during instance launch. You cannot specify a tenancy of default during instance launch. Updating InstanceTenancy requires no replacement only if you are updating its value from "dedicated" to "default". Updating InstanceTenancy from "default" to "dedicated" requires replacement.