Cirrus is A*CRC's only system that is neither based on the x86 architecture nor running any variant of Linux. It is an IBM Power7 system running AIX. Comprising mainly 30 units of the IBM P755 system (and a core count of 960), it has a peak performance of about 26TFLOPS. It is meant more for applications running on AIX that have not been ported to x86/Linux yet.

Hardware Configuration


Cirrus Cluster
  Head Node Compute Nodes
Hostname cirrus cirrus[1-30]
System IBM p755
Processor IBM Power7 3.3GHz
Cores per node 32
Memory per node 256GB 128GB
Dual-rail Infiniband DDR Gigabit Ethernet
Disk space 2TB shared scratch disk