Brutus cluster

Brutus is the central high-performance cluster of ETH Zurich. It was introduced to the public in May 2008. A new computing cluster called EULER has been announced and opened to the public in May 2014.

Processors
Brutus is a heterogeneous system containing 11 different kinds of compute nodes:


 * Standard nodes
 * 120 nodes with four 12-core AMD Opteron 6174 CPUs and 64 GB of RAM (5760 cores)
 * 24 nodes with two 12-core AMD Opteron 6174 CPUs and 32 GB of RAM (576 cores)
 * 410 nodes with four quad-core AMD Opteron 8380 CPUs and 32 GB of RAM (6560 cores)
 * 80 nodes with four quad-core AMD Opteron 8384 CPUs and 32 GB of RAM (1280 cores)


 * Large-memory (fat) nodes
 * 6 nodes with four 8-core Intel Xeon E7-8837 CPUs and 1024 GB of RAM (192 cores) ''&mdash; NEW!
 * 80 nodes with four 12-core AMD Opteron 6174 CPUs and 256 GB of RAM (3840 cores)
 * 10 nodes with four quad-core AMD Opteron 8380 CPUs and 128 GB of RAM (160 cores)


 * GPU nodes
 * 18 nodes with two 12-core AMD Opteron 6174 CPUs, 32 GB of RAM and 2 Nvidia Fermi C2050 GPUs (432 cores + 36 GPUs)
 * 2 nodes with two 6-core AMD Opteron 2435 CPUs, 32 GB of RAM and 6 Nvidia Tesla C1060 GPUs (24 cores + 12 GPUs)
 * 2 nodes with two 6-core AMD Opteron 2435 CPUs, 32 GB of RAM and various Nvidia and AMD GPUs (24 cores + 2 GPUs)


 * Legacy nodes
 * 256 nodes with two dual-core AMD Opteron 2220 CPUs and 16 GB of RAM (1024 cores)

In total Brutus contains 19,872 cores, plus a few hundreds in the cluster's file servers, login nodes and management nodes.

The peak performance of Brutus is slightly over 200 teraflops (200 × 1012 floating-point operations per second).

Networking

 * All nodes are connected to the cluster's Gigabit Ethernet backbone
 * All nodes (except those with Opteron 2220 CPUs) are connected to a high-speed InfiniBand QDR network

Applications
Thanks to its heterogeneous nature, Brutus can tackle a wide range of applications:
 * Serial and embarrassingly parallel computations
 * Distributed-memory computations (MPI using MVAPICH2)
 * Shared-memory, multithreaded applications (OpenMP) up to 1024 GB of memory and/or 48 threads
 * Third-party (commercial) applications

Trivia

 * Brutus was ranked the 88th fastest computer in the world in November 2009 (top500.org). Since then, its peak performance has increased three-fold (from 65 to 200 TF).
 * It was then the most energy efficient general purpose supercomputer in the world (Heise.de)
 * It successor, EULER, was ranked the 255th fastest computer in the world in June 2014