Zeus

24 node dual-Opteron Beowulf

Zeus is a Beowulf cluster from a commercial vendor. It contains 24 nodes, each with dual AMD Opteron 240 CPUs, 4GB of RAM, a 2 TB RAID array on the master node, and a hybrid interconnect using Myrinet 2+2 Gbps fiber for message passing and Gigabit ethernet (copper) for NFS and housekeeping. The cluster is mounted in a single 42U rack, backed by four APC Smart-UPS 3000s and fed by four 30A 120VAC circuits.

The modified Pi benchmark for Zeus, using 42 of its 48 CPUs:

[nordlie@master ~/pi]$ mpirun -np 42 -machinefile machines.LINUX ./flop
Process 4 of 42 on node3
Process 10 of 42 on node7
Process 5 of 42 on node3
Process 8 of 42 on node5
Process 32 of 42 on node19
Process 2 of 42 on node2
Process 11 of 42 on node7
Process 16 of 42 on node10
Process 27 of 42 on node16
Process 9 of 42 on node5
Process 33 of 42 on node19
Process 3 of 42 on node2
Process 38 of 42 on node22
Process 13 of 42 on node8
Process 17 of 42 on node10
Process 26 of 42 on node16
Process 22 of 42 on node13
Process 14 of 42 on node9
Process 6 of 42 on node4
Process 28 of 42 on node17
Process 12 of 42 on node8
Process 39 of 42 on node22
Process 31 of 42 on node18
Process 23 of 42 on node13
Process 15 of 42 on node9
Process 29 of 42 on node17
Process 24 of 42 on node14
Process 40 of 42 on node23
Process 30 of 42 on node18
Process 36 of 42 on node21
Process 1 of 42 on node1
Process 25 of 42 on node14
Process 41 of 42 on node23
Process 21 of 42 on node12
Process 37 of 42 on node21
Process 19 of 42 on node11
Process 34 of 42 on node20
Process 20 of 42 on node12
Process 35 of 42 on node20
Process 18 of 42 on node11
Process 0 of 42 on node1
Process 7 of 42 on node4
pi is approximately 3.1415926535897629, Error is 0.0000000000000302
wall clock time = 0.460008
Estimated MFLOPs = 13043.247328