Are Converged Network Adaptors Suffocating The Virtual Machine?

Last week I reviewed real-world results of a test between the Emulex UCNA and the QLogic 8152 CNA. The testing illuminated a performance delta between the products, and it demonstrated another important issue: a big difference in CPU utilization while running FCoE. For the past few months, Emulex has been making some fairly broad claims that its UCNAs can support nearly one million IOPS, which it says towers over the performance available from all other CNAs in the marketplace. Emulex said that, for virtualized server environments, this leap in network performance is needed to fully realize the capacity of the new Intel Xeon-based servers.