NCSA Xeon Linux Cluster Technical Summary

Production date: April 26, 2004

[tungsten.ncsa.uiuc.edu]
[login-w.ncsa.teragrid.org]

COMPONENT

DESCRIPTION

Hardware & Networking

Architecture

Linux Cluster

System

Dell PowerEdge 1750 server
dual-processor
3 GB ECC DDR SDRAM memory

Number of systems

1450 (1280 compute nodes)

Processor
(as of August 2004)

Intel Xeon 3.2 GHz (32-bit)
533 MHz System Bus
512 KB L2 cache
1 MB L3 cache
Peak Performance

Network Interconnect

Gigabit Ethernet
Myrinet 2000

Disk

Node local:	70 GB
Shared:	122 TB

Software

Operating System

Linux 2.4.20 (Red Hat 9.0)

Compilers

Intel: Fortran77/90/95 C C++
GNU: Fortran77 C C++

Batch System

Load Sharing Facility (LSF)

Policies/User Limits

Home directory disk quota

5 GBytes

Interactive scratch quota

None currently

Maximum disk per job

No limits currently

Charging Algorithm

  # SUs = 2 * #Nodes * Time

  where
  SUs  = Service Units
  Time = Total Wall Clock Hours

Recommended Use Guidelines

The NCSA Xeon Linux Cluster (tungsten) is primarily intended to run applications of moderate to high levels of parallelism (32 processors or larger), particularly those needing a 32-bit environment and codes that perform well in a distributed cluster environment. In addition, requests for extended access to 128-256 dual processor nodes for larger scale runs are encouraged. Please contact consult@ncsa.uiuc.edu to make such a request.