Please refrain from occupying the CPU on the login nodes.

Do not execute programs that occupy the CPU on login nodes (login, login1, login2). Please use compute nodes for parallel and long-running tasks. The following are examples of judgment criteria. Even if a program is permitted or not listed here, it may be terminated or deleted without prior notice at the discretion of the system administrator if it interferes with other users.

Allowed behavior

  • File transfer, compression, decompression (e.g., scp, sftp, rsync, tar)
  • Program Compilation (Please use compute nodes when using many resources at once, such as parallel compilation) 

Problematic behavior

  • Calculation using ISV applications (e.g. MATLAB, AMBER)
  • Calculation using free applications (e.g. WRF, Gromacs, svm-train, a.out)
  • Execution of programs that run for more than 10 minutes (excluding file transfer)
  • Execution of parallel processing programs (including python and MPI)
  • Execution of programs that consume large amounts of memory
  • Simultaneous execution of multiple processes
  • Execution of server programs or programs that auto-restart (e.g., VSCode Server, Jupyter Notebook)
     →  Jupyter Lab and code-server(VS Code clone) can be launched on compute nodes via Open OnDemand
  • Frequent execution of the qstat command (every few seconds to tens of seconds)
     →  If you want to receive a notification when a job finishes, consider using the -m option. If you want to start another job upon the completion of a job, consider using the -hold_jid option.
  • Other tasks that impose a heavy load on the CPUs for a long time

For the latest information, please refer to the corresponding section of the User Guide.