For Red Hat documentation:
Red Hat Enterprise Linux (RHEL):
https://access.redhat.com/site/documentation/Red_Hat_Enterprise_Linux/
Red Hat Enterprise Virtualization (RHEV):
https://access.redhat.com/site/documentation/Red_Hat_Enterprise_Virtualization/
KVM Whitepaper:
KVM Open source Project Site:
For SUSE:
SUSE Linux Enterprise Server (SLES):
For SLES11SP3 installation information:
http://www.suse.com/documentation/sles11
For a full set of features and capabilities, see the SUSE documentation.