Network Latency Question: Gigabit Fiber vs Gigabit Copper
Posted on 2006-11-13
So I'm in the process of setting up a iSCSI EqualLogic PS300 SAN. The unit uses 6 - Gigabit Ethernet ports (3 on each storage processor card) and comes with the ability to use Gigabit Fiber (1000BaseSX) via SFP or standard 1000BaseT ethernet jacks [SFP slot next to a gigabit jack].
What I'd like to know is:
If you use 1000BaseSX (via SFP modules), will it actually decrease your network latency compared to copper?
My network back bone is a Cisco 4507R with a series of 6 port blades that support either SFP modules (1000BaseSX or LX) or 1000BaseT.
My interest is that I'll be setting up a HPC (High Performance Cluster) and rather than using 10Gig, Infiniband, or Myrnet I'd like to get the best bang for the buck I've already spent.
I'd like a complete and through answer to this question...