Notes for New Users
Your account will give you access to all
the machines. Initially, fixed quotas will not be set on disk space and CPU use, because a significant
proportion of the machines' power would be lost to accounting. However, CPU and disk use will be
monitored, and a quota system will be introduced if it becomes necessary. Priority will be given to
those research groups that provided funds for the system.
The computers are hidden behind a firewall, gatecal.ch.cam.ac.uk.
Details are available (Cambridge Access Only)
The machines are not suitable for long-term data storage. If insufficient disk space is
available for teaching, then files will be deleted. If the owners of the files cannot be contacted, then
the files may be deleted anyway. Calculations will be stopped when the machines are needed for
teaching.
The machines will be used for courses from time to time, and will not be available for
research. A timetable and other information will be available on-line in the directory /info.
- You may only use your own User ID. You must not permit anyone else to use your User ID
- The computers must never be switched off. If they seem to have crashed then either:
- Wait (this often solves the problem)
- Contact JMG.
- To change your password, type yppasswd. You will then be prompted for your old password
and a new password. The passwd command does not do this.
- Long jobs should be run at low priority. The batch command may be used
to do this.
- Your job will run on the machine that you are logged on to. The rload command tells you the
load on all the machines.
- If your calculation requires a lot of disk access, then you should run it on the machine which
stores your directory. Instructions are available.
- Do not run calculations on fcal. This may only be used for its graphics.
- As a rough guide, try not to use more than 20 Mb of disk space. This may change at short
notice.
- If you have a program that is likely to be of general use, it may be best to keep it on the server. Consult JMG.
Advice
If you have questions or need help, contact
Dr Jonathan Goodman
(Room UG10; University Network Telephone 36434; jmg11@cam.ac.uk)
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