Technical Service

If you have any technical problems about computer operations, please contact the application support group of CCSE.

Email: hpc@sustech.edu.cn

Engineers: “Qi-Ming”: Mr. Yang Qiyao (yangqy@susstech.edu.cn); “Tai-Yi”: Mr. Ou Zhengyi (18983630046)

Questions about “Tai-Yi”

1. Why doesn’t the command in the job script take effect?
   Possible reason:
   There is Chinese characters in the command line input.

2. Why the program works on other HPCs but the university’s?
   Possible reasons:
   

   1. The program hasn’t been compiled on the university’s HPC, so you cannot run it directly. A program needs to be re-compiled if you want to run it in a new platform.
   2. The submission script should be amended according to the user manual of the university’s HPC before resubmitting it.

3. How to query the limit of job running time of a queue?
   You may run bqueues -l <queue_name> or read the manual.

4. What happens when there are expressions like “quota” or “cannot write” in the job’s error message?
   The account’s storage volume has been run out.

5. How to load the environment variables for a shared software?
   You can use the module or export command to load environment variables, as shown below:

   module load fftw/3.3.8

   or,

   export PATH=$PATH:/share/base/fftw/3.3.8/bin
   export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/share/base/fftw/3.3.8/lib
   export INCLUDE=$INCLUDE:/share/base/fftw/3.3.8/include

6. How to query the limit of number of jobs and that of number of cores?

   busers -w

7. What’s the command for excluding a node in the submssion script?
   You can use #BSUB -R "select[hname!='node2']" to exclude node2.

8. The job ran but why does it output nothing?
   The cause may reside in the script, the program, the input data, or the computing node. It depends.

9. Why does my shell prompt become -bash-4.2$?
   There is something wrong in the account’s shell configuration file. Please contact the administrators for help.

10. Can I access the Internet in login nodes?
    The login04 node is connected to the Internet.

Questions about “Qi-Ming”

1. How to load the environment variable for a shared software?
   Please refer to the examples in /opt/environments/. For instance,
   

   export PATH=$PATH:/opt/software/fftw-3.3.6/bin
   export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/opt/software/fftw-3.3.6/lib
   export INCLUDE=$INCLUDE:/opt/software/fftw-3.3.6/include

2. What happens when there are expressions like “quota” or “cannot write to file” in the job’s error message?
   The account’s storage volume has been run out.
   

   1. Command for query: lfs quota -u <username> /home/ -h
      In the output, used refers to the used volume while limit stands for the total quota.
   2. You cannot continue writing to files after exceeding the upper bound. Please clean up your files in time.

3. How to query the job running time limit of all queues?

   qstat -q

4. What’s the backup directory of my account?
   

   /home/bak/home/<username>

5. Where can I find a script template for Gaussian?
   There is a shared template in QQ group 161195492.

6. Why can’t I use wget?
   Ordinary users do not have execution access to wget.

7. Can I access the Internet in login nodes?
   Yes.