On Mon, 11 Feb 2013, Adam Goryachev wrote:
If I use a 10G connection for the SAN, and multiple 1G connections for the clients, then I will still end up with a max of 1G read speed, since the switch will only deliver data on a single port. So to get better than 1G speed, I must use higher bandwidth channels, but using 10G on all machines allows a single server to "flood" the network...
If your equipment supports it, you should put in some kind of policer to rate-limit traffic based on destination (or the whole port). Then you could limit each server to 2-3 gigabit/s on their 10G port, and the file server could get its entire 10G port (or limit that to 5-6 gigabit/s).
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