Interactive Processes
Interactive jobs may only be run on a development server within an interactive SLURM session; see the Development & Testing wiki page for more information on development servers and the procedure to request a session.
Login Servers
No interactive jobs are allowed on the load-balanced login servers. These servers are accessed via ssh as hpg.rc.ufl.edu. They are the primary gateway to UFIT Research Computing resources, provide a software environment identical to that found on the compute servers, and are to be used only for job and file management activities such as:
- Submitting jobs to the batch queues
- Checking the status of jobs
- Managing files and data
Because of the importance of these servers to a large number of users, they must not be used for running your programs. The interactive development servers are available for that purpose. Users found running jobs interactively on the login servers may lose access to the cluster for up to thirty days. If a second offense occurs, the user’s account may be permanently disabled.
Large Numbers of Jobs
If you need to submit jobs in batches of more than 10,000 jobs at one time (with or without job arrays), you must contact us for prior approval so that we can be sure the jobs will be submitted and run in an efficient manner. A large number of jobs of very short duration can have a negative impact on the batch system and may adversely affect other users.
Code Development and Testing
If you develop code (i.e. the standard edit, build, test cycle), there are several machines on which you can do so and run short, interactive tests; see the Development & Testing wiki page for more information.
Compute Nodes
Compute nodes are meant for performing work under the batch system. As such, direct interactive access to compute nodes is prohibited.