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How to make an informed choice of SAN switch ports
Hi everyone,
My main SAN is built around 2 x Brocade 48000 directors - 6 x 32-port cards per chassis. Whilst Brocade's documentation is very helpful on e.g. grouping connections on ASICs to avoid traversing the backplane - and saving a whopping 1600 nanoseconds into the bargain :-) - it has rather less to say about best practice in respect of what should ( or maybe should not ) be located on the same ASIC. With 2 ASICs per card and hence 16 ports per ASIC, there's ample scope for co-locating FA ports, HBAs and especially native fibre-attached tape drives on the same ASICs which may, or may not represent good design. I suppose that, to a degree, it's inevitable with something like 90% port occupancy ... We don't have any performance issues, but if there's scope for a quick win here and there, I'm open to suggestions. Many thanks all, Nick, UK. |
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