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About the systems:
Cray Y-MP EL (yel)
Cyber 960 (cy960)
Cyber 860 (cy860)
Cyber 830 (phoenix)
Desktop Cyber (dtcyber)
Control Data Net (cdcnet)
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CData 4680 (majestix)
Sun Enterprise 10000 (e10k)
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Cyber Disk Emulator
MUNIAC Vacuum Tube Computer

Team Members:
John G. Zabolitzky
Alexander Mann
Freddy Meerwaldt
Wolfgang Stief

In memory of:
Seymour Cray
Control Data Corp
Cray Research
Cray Computer Corp

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The Cray Y-MP EL (yel)

This machine is accessible through the internet 24x7
See live system information here (participates on SysInfo)

Picture of yel
Click on the image to enlarge
Times of operation: 24x7 (from Nov 27th only every Saturday)
Machine Type: Cray Y-MP EL (Entry Level)
Serial number: 5176
Year of introduction: 1991
CPU Type: Cray Y-MP EL (Vector processor, CMOS technology)
Number of processors: 4
Main memory: 128 MWords -> 1024 MByte
Word length: 64 bit
Binary compatibility: up to the Cray-1 (1976)
Local storage: 2x DD4 Hard Disks - 1 GB each
One IBM 3740 (?) tape drive
Network connectivity: 10 MBit Ethernet
125 MBit FDDI
Specified performance: 133 MFlops per CPU peak
4-8 times a Cray-1
1/4 of a Cray-2
Measured peak performance: 460 MFlops (A 2.4 GHz P4/RDRAM is 770 MFlops on the same benchmark problem, huge matric multiply, with Linux gnu cc -O3)
Operating system: Cray UNICOS (Unix-based)
Commercial products installed: C Compiler, F77 Compiler
Free software installed (/usr/local): Bash, GNU Make, Readline, GZip, less, vim, unzip, GNU tar, xaos, perl (in /opt)
Donated by: Leibniz Rechenzentrum, München

Links related to this machine:
- Mail announcing availability of the Cray Y-MP EL
- Short form users guide for this machine (written by Cray-Cyber)
- Short form guide to vectorization and parallelization (Cray-Cyber)
- Block diagram of the Cray Y-MP EL

On-line documentation may be accessed via the man command when logged in, see short form users guide.
All content on and all subsites of are Copyright © 2002-2007 by the Cray-Cyber Team
Cray is a registered trademark of Cray Inc.

Document last modified on: Sun, 12.October.2014 16:07:00