The High Energy Physics group at the University of Wisconsin
maintains an information technology infrastructure that is
trouble-free, secure, highly available and well understood.
We use AFS file sharing and Condor batch computing software to
implement a high throughput Linux computing environment on
Opportunistic computing resources from the Grid Laboratory of
Wisconsin and Computer Science Department provide the potential
for utilizating a total of over 2900 Linux CPUs.
Sun Solaris and Linux computers are used to provide domain
name service, backups, email, spam filtering, centralized printing
and web hosting. We also have a small cluster of HP workstations
running HP-UX for CAD work.
Our Grid Network is implemented using a Cisco Catalyst 3750G-16TD
switch stack (10 Gbps uplink to the Internet) and our Staff Network
is implemented using a Cisco Catalyst 4503 switch (2 Gbps uplink)
at the core, with gigabit ethernet over fiber trunks fanning out
to Cisco Catalyst 3750 switches.
Our older compute servers are 1U rack-mount systems with Supermicro
or Intel motherboards, dual Xeon CPUs and gigabit ethernet. Our
newer generations of compute servers are 1U rack-mount 1.8 GHz
dual/dual (four CPU) Opteron based Supermicro systems with gigabit
Our storage servers are dual Xeon CPU based systems with
5 TB Apple Xserve RAIDs attached via Apple's PCI-X fibre channel
card and 80 systems with 1 TB of ordinary ATA100 disk.