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How to make an informed choice of SAN switch ports



 
 
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Old June 22nd 09, 09:49 PM posted to comp.arch.storage
Nicholas Buckley
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Posts: 4
Default 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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