There are pitfalls involved in using software-based network interface cards
(NIC) and host bus adaptors (HBA) as they don’t scale well in I/O-centric
loads running on scaled-out architectures. The CEO of one of the leading
virtualization companies has said, “Software virtualization addresses 80%
of the market and it leaves 20% for hardware-based I/O virtualization.”
Scaled-out architectures and stateless computing are the norm in the
computing business. I/O devices are being pulled out and connected through
PCI Express Gen 2 as a step toward scaled-out architectures. A second step is
to combine Ethernet and Fibre Channel onto Fiber Channel Over Ethernet. FCoE
scales well and provides unparalleled performance to the system. The number
of I/O connections and I/O devices r... (more)