multipathing and bandwidth
Sorry to rehash an old question here, but I'm panicking a bit.
I've done the math, and our SAN should be capable of pushing out 2000MB/s+, easy. I have a Mac Pro Server with an Apple quad port fibre channel card installed. My Qlogic switch ports are all set correctly per the recommended Xsan/Qlogic settings from Apple. I'm barely breaking 500MB/s through this one server, though. I'm seeing all the LUNs on every FC port, so I don't understand why this is an issue. It seems to me like I've either misconfigured something or I've greatly underestimated the capabilities of this card.
Here's a summary of the fiber paths:
I've got 4x 16TB ActiveRAIDs, each configured with two 7-drive RAID5 LUNs. Each RAID controller is spanned across two switches. There are five Qlogic switches in total, and all the 10Gb stacking ports are connected for maximum redundancy. The RAID controllers populate most of switches 1 and 2. The Mac Pro Server with the quad FC card is connected to switches 1-4.
I'd gladly take any recommendations for config changes or hardware upgrades. Perhaps we just need a different FC card?