Job Limits

Each LC platform is a shared resource. Users are expected to adhere to the following usage policies to ensure that the resources can be effectively and productively used by everyone. You can view the policies on a system itself by running either:

joblimits
news job.lim.MACHINENAME

Web version of Magma Job Limits

There are 5 generally available machines on the SCF. Please consider your needs to decide which machine is best for your flavor of work.

• Bengal—a machine for small to large jobs (24 hour job limit)
• Mica—a small machine for debugging (8hr job limit)
• Jadeita—a machine for small jobs
• Magma—a machine for small to medium jobs
• Jade—a machine for large jobs (4 jobs/user limit)

Magma is now in General Availability mode and all jobs are scheduled per node in two pools. Remember you can run in the guests bank to get additional resources if there are a lot of empty nodes.

• pdebug—20 nodes (1920 cores), interactive use only.
• pbatch—732 nodes (70272 cores), batch use only.

Pools               Max nodes/job       Max runtime
---------------------------------------------------
pdebug                    4(*)            1 hour
pbatch                   64(**)          36 hours
---------------------------------------------------

(*) pdebug is for debugging, visualization, and other interactive work.

•    Jobs are core scheduled
•    There is a limit of 384 cores per user per bank
•    Do not use pdebug for production work or chain jobs
•    Using more than these limits can result in job removal without notice.

(**) pbatch is for small to large jobs.

•    Jobs are node scheduled
•    There is a limit of 150 nodes per user per bank at any one time
•    There is a limit of 20 jobs per user per bank at any one time

Hardware

• Intel Cascade 2.3GHz cores
• Intel Omni-Path Interconnect
• 96 cores/node
• 256GB memory/node