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:

news job.lim.MACHINENAME

Web Version of Ruby Job Limits

There are 1504 compute nodes, with 56 cores and 192 GiB of memory on each node.

Jobs are scheduled per node. Ruby has 2 scheduling pools (or partitions) :

• pdebug—24
• pbatch—1480 nodes (82880 cores), batch use only.

Pools               Max nodes/job       Max runtime
---------------------------------------------------
pdebug                   12(*)           60 minutes
pbatch                  520              24 hours
---------------------------------------------------

(*) Jobs in pdebug are limited to 12 nodes on a PER USER basis, not a PER JOB basis, to allow other users access to this limited resource.  Pdebug is scheduled using fairshare.

Pdebug is intended for debugging, visualization, and other inherently interactive work.  It is NOT intended for production work. Do not use pdebug to run batch jobs.  Do not chain jobs to run one after the other. Individuals who misuse the pdebug queue in this or any similar manner will be denied access to running jobs in the pdebug queue.

Hardware

Each node has 2 28-core Intel Xeon CLX-8276L processors (2.2 GHz) and 192 GiB of memory.

Ruby uses an Intel Omni-Path Interconnect.

Documentation

• Linux Clusters Tutorial Part One | Linux Clusters Part Two
• Slurm Tutorial (formerly Slurm and Moab)

Contact

Please call or send email to the LC Hotline if you have questions. LC Hotline | phone: 925-422-4531 | email: lc-hotline@llnl.gov