CCC-graphics cluster

For an account on these computers:

If your request is approved it will be forwarded to (or you should then email) chem-unix@bristol.ac.uk with your UoB username and name of your supervisor.

For support email chem-unix@bristol.ac.uk.

See this page for information about how to change your password on the cluster.

Each year you will have to renew your account for it to remain open. You will receive an email about this in January each year, please reply to this email stating whether or not you wish your account to remain open.
If/when you leave Bristol, please contact the system administrator and provide a new email address so that you can continue on the ccc-graphics email list.

Only secure shell connections are allowed to these computers.

Notice under the Data Protection Act

File storage space is provided on the ccc-graphics cluster solely for your research data and results. Private files should not be kept on the ccc-graphics cluster as they are not held confidentially. Access to your files will be provided to members of staff, and to others if the appropriate member of staff requests it.

The Systems

Computational Group Systems in W233

Bio-NMR Group Systems in N321

Laurel is the nameserver for the cluster and hardy is the fileserver, that is, your will have the same username, password and home directory on all systems in the cluster. The user disk space on the ccc-graphics cluster is backed up approximately every two weeks.

Laurel and hardy can be used for general calculations, the other systems are workstations, intended for running graphical based modelling programs. In general laurel and hardy should only be used for programs that can only be run on SGI's or that need to be run interactively. The normal systems for running CPU intensive calculations are grendel, dirac and bohr.

Laurel and hardy can normally only communicate with chemistry department computers. If you wish to connect with laurel or hardy from outside the department and have an account on another of the clusters belonging to the department (e.g. grendel), you should first login to the other cluster, and from there login to laurel or hardy. If you do not have an account on another cluster you will need to send the IP address of the computer you will use as your local host to the system administrator to make the connection possible.

Computational group workstations can only communicate with the Chemistry 40 subnet (including chm-fs), grendel, dirac and bohr.

Bio-nmr group workstations can only communicate with the Chemistry 43 subnet, chm-fs, laurel and hardy.

All users can login to laurel and hardy. Other than that, bio-nmr users cannot use the computational group workstations and vice-versa.

The default printer for the computation group systems is the network laser printer in W233.

Users of the bio-nmr group are advised to modify their .cshrc file to differentiate between SGI's and the SUN so they can customise it appropriately. This can be done as e.g.

# For interactive shells, set the prompt to show the host name and event number.
if ( (! $?ENVONLY) && $?prompt ) then
   setenv MEKOS `uname`
   if ( $MEKOS == "IRIX64" ) then
        # do these for an SGI
        if ( -o /bin/su ) then
                set prompt="`hostname -s` \!# "
        else
                set prompt="`hostname -s` \!% "
        endif
   else
        # do these for a SUN
        if ( -o /bin/su ) then
                set prompt="\!# "
        else
                set prompt="\!% "
        endif
   endif
endif

Software

Look in /usr/freeware/bin and /usr/local/bin for useful utilities. In particular a2ps, enscript, locate, gnuplot, xmgrace (formerly xmgr), xfig and xv are installed on all the workstations.