On 11/06/2020 08:53, Giovanni Bracco wrote:
[SNIP]
not really: both clusters, the 400 OPA nodes and the 300 QDR nodes share
the same data lake in Spectrum Scale/GPFS so the NSD servers support the
flexibility of the setup.
NSD servers make use of a IB SAN fabric (Mellanox FDR switch) where at
the moment 3 different generations of DDN storages are connected,
9900/QDR 7700/FDR and 7990/EDR. The idea was to be able to add some less
expensive storage, to be used when performance is not the first priority.
Ring up Lenovo and get a pricing on some DSS-G storage :-)
They can be configured with OPA and Infiniband (though I am not sure if
both at the same time) and are only slightly more expensive than the
traditional DIY Lego brick approach.
JAB.
--
Jonathan A. Buzzard Tel: +44141-5483420
HPC System Administrator, ARCHIE-WeSt.
University of Strathclyde, John Anderson Building, Glasgow. G4 0NG
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