I'm standing before choice of NICs and switch for storage server and virtualization hosts and I can't decide between 10G and quad gigabit with bonding-rr. 10G is noticeably more expensive solution and we don't really need 10G, 4G is definitely enough...
However I'm a bit worried about how NFS scales with bonding-rr. Did anyone use NFS with such setup? Is it viable alternative to single higher bandwidth link? I'm aware of some good practices for this kind of bonding (4 separate vlans for each set of links to reduce collisions) and I took a look at some stories describing such setups in production but they typically compare it to theoretical bandwidth or single gigabit performance - not 10G.
Does anyone know some other topics and issues I should take into consideration with mentioned options?