Regional Centre for Accelerator based Particle Physics - RECAPP

Harish-Chandra Research Institute,

An Aided Institute of The Department of Atomic Energy, Govt. of India

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Users are required to submit jobs ONLY through Head/ Master node. You cannot submit jobs from Compute Nodes.

HPC Resources usage and utilization policy:

There is currently no quota/ limit on the number of jobs that can be executed or submitted to the Portable Batch System (PBS), or allocation, queue for the Linux cluster. For optimal use of resources cluster users have to follow certain rules. The HPC Resources usage and utilization policy for running Jobs are as under.

  1. Please use /home for keeping relevant data only. (do not use as your storage).
  2. You will only use /scratch/<userdesired folder> for submitting jobs
  3. Jobs which are required to submit on cluster should be copied to your respective users folder
       in /scratch.
       eg: A username with XYZ, should create its folder in /scratch as /scratch/xyz, then copy the
           files to /scratch/xyz and then submit the job. (ONLY IF FOLDER DOES NOT EXIST)
       NOTE:
        >>> Submiting Job from /home will make network unresponsive, so always submit jobs from /scratch only.
        >>> To Change the permission of your /scratch folder by typing the following command as:
           # chmod 700 /scratch/<your_folder_name>
  4. Users are required to monitor and maintain their cluster disk usage to following standards:
                    a. /HOME - MAXIMUM STORAGE USAGE CAPACITY IS 2GB ONLY.
                    b. /SCRATCH - MAXIMUM STORAGE USAGE CAPACITY IS 500GB ONLY.
  5. Since there are 10 nodes with 24 cores each. The maximum of 24 cores/ 01 Node a user can occupy for more than 24 hours.
  6. If resources are free, users can submit jobs exceeding the above limits. As long as this does not cause jobs from other users to be queued. However, if it is found that user using more than his/ her quota leads to other users getting queued, jobs in excess of quota will be canceled by the system Admin without prior warning. Jobs submitted last will be canceled first.
  7. A user account may only be used by the authorized account holder.
  8. Defective configurations, program errors or other damaging/ disruptive activities directed against the HPC facilities or other users is prohibited.