Fermilab Computing Division

CS Document 458-v1

Lattice QCD Clusters at Fermilab

Document #:
CS-doc-458-v1
Document type:
Conference
Submitted by:
JoAnn Larson
Updated by:
Donald Holmgren
Document Created:
05 Aug 2004, 11:31
Contents Revised:
22 Sep 2004, 16:32
Metadata Revised:
20 Jan 2005, 10:25
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CS-doc-458-v0
20 Sep 2004, 18:10
Abstract:
As part of the DOE SciDAC "National Infrastructure for Lattice Gauge Computing" project, Fermilab builds and operates production clusters for lattice QCD simulations. We currently operate three clusters: a 128-node dual Xeon Myrinet cluster, a 128-node Pentium 4E Myrinet cluster, and a 32-node dual Xeon Infiniband cluster. We will discuss
the operation of these systems and examine their performance in detail.

The design of lattice QCD clusters requires careful attention towards balancing memory bandwidth, floating point throughput, and network performance. We will discuss our investigations of various commodity processors, including Pentium 4E, Xeon, Opteron, and PPC970, in terms of their suitability for building balanced QCD clusters. We will also discuss our early experiences with the emerging Infiniband and PCI Express architectures. Finally, we will examine historical trends in price to performance ratios of lattice QCD clusters, and we will
present our predictions and plans for future clusters.

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Notes and Changes:
Fermilab Publication number CONF-04-484-CD
Associated with Events:
CHEP2004 held from 27 Sep 2004 to 01 Oct 2004 in Interlaken, Switzerland
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