[gpfsug-discuss] Anybody running GPFS over iSCSI?

[Jonathan Buzzard]

On Mon, 2018-12-17 at 08:50 +0100, Jan-Frode Myklebust wrote:
> I’d be curious to hear if all these arguments against iSCSI shouldn’t
> also apply to NSD protocol over TCP/IP?
> 

They don't is the simple answer. Either theoretically or practically.
It won't necessarily be a problem for iSCSI either. It is the potential
for wild over subscription of the links with the total naivety of the
block based iSCSI protocol that is the issue. I suspect that with NSD
traffic it is self limiting.

That said looking about higher end switches seem to do DCE now, though
FCoE seems to have gone nowhere.

Anyway as I said if you want lower cost use SAS. Even if you don't want
to do ESS/SSS you can architecture something very similar using SAS
based arrays from your favourite vendor, and just skip the native RAID
bit.


JAB.

-- 
Jonathan A. Buzzard                         Tel: +44141-5483420
HPC System Administrator, ARCHIE-WeSt.
University of Strathclyde, John Anderson Building, Glasgow. G4 0NG