Thanks for pointing out this question.

For that test I we were doing 8k Random Reads with a high outstanding IO count (40 total), Six 4 Gbps links from 1 host, a dual cpu dual core Opteron with QLogic HBAs.

The site below references that they use a RamSan-400 for the test and shows close to the performance you can get with one of the RamSan dual ported FC400 (4 Gbps) Controller for a variety of loads. The RamSan-400 supports 4 FC400s (8 ports total) with active/active access from each port to any LUN in the RamSan.
http://www.qlogic.com/documents/datasheets/knowledge_data/whitepapers/Scaling_SAN_Fabric.pdf

The two limitations of the system (with maximum controllers) are 400,000 IOPS or 3 GB/s for any combination of reads/writes with varing block size.

Thanks!
Jamon Bowen
Sales Engineer
Texas Memory Systems, Inc

Good question that I wish I’d thought of myself. I’ve asked TMS to respond and I hope they do.

Robin

To comment on the 278,000 IOPS we need to know how ‘small’ the transfers were, how many host channels & servers were involved and if this test was a read, write or a % mixture of both.