Product : AppScale, Eucalyptus/Current, 4.4.5
Feature : VM Type - General Purpose, Compute, Infrastructure Services
Content Owner:  John Gallucci
Summary
Virtual machine hardware can be configured to take full advantage of the underlying hosts hardware. A collection of instance types can be customized in terms of vCPUs, memory, and disk.
Details
https://libvirt.org/formatdomain.html