## Lattice Gauge Computing at Fermilab

On this page: Lattice QCD |
Fermilab Lattice Clusters

### Lattice QCD

Fermilab Lattice Portal | SciDAC Lattice Program | USQCD Lattice QCD Physics
Program | Lattice Links

Quantum Chromodynamics (QCD) describes how quarks and gluons interact via the
strong force and predicts in principle the masses of their bound states, known
as hadrons. Such predictions are beyond the reach of the traditional
perturbative methods of quantum field theory and can only be done by the
numerical simulation of QCD on a lattice of space-time points ("Lattice
QCD"). Substantial computing resources must be applied to these simulations.

Fermilab builds and operates large clusters of computers for lattice quantum
chromodynamics, as part of the national computational infrastructure for
lattice QCD project established by the Department of Energy. Fermilab is also a
participant in a DOE SciDAC-2 program devoted to the improvement of software
for lattice gauge computing.

### Fermilab Lattice Clusters

Fermilab Lattice Portal | Cluster Status | Cluster Information | Cluster Performance

The Fermilab Computing Division operates four lattice clusters. These are a
128-node 2.8 GHz Pentium-4 Myrinet cluster, a 520-node 3.2 GHz Pentium 940
Infniband cluster, a 600-node dual-socket dual-core 2.0 GHz Opteron
Infiniband cluster, and a 586-node dual-socket quad-core 2.1 GHz Opteron
Infiniband cluster (to be expanded to 856 nodes in April 2009).
At 6.894 TFlop/s, the 600-node Opteron cluster ranked
number 95 on the 28th Top500 list published November, 2006. The design of
these clusters required careful balancing of the processors, memory and I/O
buses, and high performance network fabrics.

*For assistance, contact Help Desk, helpdesk@fnal.gov*

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last
modified by D.J. Holmgren on Feb 27, 2009