[gpfsug-discuss] very low read performance in simple spectrum scale/gpfs cluster with a storage-server SAN

[Jonathan Buzzard]

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