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High Performance Computing | November 23, 2009 | ||||||||||
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It is a good idea to forward your email from the HPC to wherever you regularly read it so that you can be informed of any important announcements. To do this, create a file in your home directory called .forward with one line containing the address to which your mail should be forwarded.
The University of Kentucky Computing Acceptable Use Policy is available at
http://ukcc.uky.edu/policy.html. In particular,
accounts are granted to one person only and
no other person may use the account. No exceptions
will be made regarding this policy. Failure to abide by these policies will result
in suspension of computing privileges.
Please see http://hpc.uky.edu for information regarding the use of this system. In particular, note:
All interactive jobs MUST be run on the login node. No interactive jobs may be run on other nodes.
Because the system
is a cluster of multiple interconnected nodes,
the only way to use more than 16 processors is to
use MPI.
For more information on
MPI see the
MPI documentation
in the Documentation section on this Web site.
Gaussian does not include support for MPI and
is not configured to run across more than one host. Therefore, the
default environment is for Gaussian jobs to be run as a maximum
16-way parallel job on a large SMP host.
In addition, Gaussian must be run as a batch job. To learn about running Gaussian batch jobs using a helper script, please read executing Gaussian as a batch job in the software documentation section on this Web site.
The home dir filesystems on the login node are limited by
quotas.
Run quota
-v to see your default quota usage. When you reach the
soft limit
and start getting warnings, you can move files to the HSM tape
archive. You willl need to set up an HSM account first.
For more information on HSM and data
storage, see
the Datastorage web page.
Send requests for an HSM account to
accounts@hpc.uky.edu
or go to Room 111 in McVey Hall.
Please create any large temporary files in the scratch directories
provided on each node. Doing this will give your job better I/O performance. The path for the scratch area is
/scratch/your_userid. To maintain backward
compatibility with the previous system, the get_scratch script will output this string,
so previous shell scripts that used it should still work, but
get_scratch is no longer necessary.
Any files left unused in the scratch directories for more than thirty
(30) days are subject to being purged. This time limit may be adjusted due to extraordinary circumstances (such as file
system full, etc.), but every effort will be made to retain files for that length of time. Please note that files in the
scratch areas are not backed up.