Whitepaper: Impact of HBA Performance on Server Virtualization

QLogic has just released a new whitepaper to fight back performance superiority claimed by its competitor Emulex in April.

The research claims QLogic 4GB FibreChannel HBAs achieve 38% higher performances in scalability testing on a VMware ESX Server 3.0.1 environment.

Tests were performed to compare I/O performance of QLogic and Emulex 4Gb FC HBAs in a VMware ESX Server 3.0.1 virtualized environment with Windows Server 2003 as a guest OS. IOmeter was used to measure the IOPs and throughput values across a range of block sizes. The IOmeter tests were run to measure how HBA performance would scale across instances of 1, 2, and 4 VMs for:

  • Sequential Reads
  • Sequential Writes
  • Sequential Read/Write (full duplex)

Windows Server 2003 was the guest OS used in all three test cases. I/O was run in a physical compatibility mode on a mapped raw LUN per VM…

Read the whole whitepaper at source.

Despite different test approaches and results it’s worth to note that first performance comparison, claiming Emulex superiority, was realized by an independent research firm, while this one, claiming QLogic superiority has been realized in house.