SmartOS is a server-oriented distro of illumos, created by Joyent for use in their cloud service.
SmartOS is a server-oriented distro of illumos, the fully open community fork of the OpenSolaris operating system. Joyent originally created SmartOS to replace OpenSolaris as their cloud service platform, and then opened it up to the wider community. The KVM hypervisor has been integrated alongside existing OpenSolaris features such as ZFS, DTrace, and zones.