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Iridis

Iridis

Hosted and operated by the University of Southampton, Iridis is a 12,000 core Intel Westmere system giving a performance of circa 108TF. Iridis provides the capability to perform demanding, highly scaled work that cannot be accommodated on local facilities.

Technical specifications:

  • 924 stateless compute nodes.
  • Approximately 22GB of usable memory per node. The remaining memory is used to store the O/S as the nodes are stateless.
  • Two 6-core 2.4GHz Intel Westmere processors (a total of 12 processor cores) per node.
  • Three front-end nodes for interactive login and remote visualisation.
  • Infiniband interconnect, composed of groups of 32 nodes connected by DDR links to a 48 port QDR leaf-switch. The leaf switches then have 4 trunked QDR connections to 4 QDR 48-port core switches (giving 4 redundant pathways for extra bandwidth & resilience).
  • IBM general parallel file system (GPFS), giving around ~110TB of usable storage divided among the users and split between permanent storage and temporary/scratch space.