*2 nodes: rztrona[2,5

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 RZTrona

RZTrona is an M&IC resource to be used for serial and on-node parallelism only. Jobs are scheduled per core and this system does not have a high-speed interconnect.

Hardware

Each Rztrona node contains dual-socket Intel Broadwell processors (2.1 GHz) each with 18 cores for a total of 36 cores/node and 128 GiB memory/node.

Scheduling

Batch jobs are submitted using the MOAB job scheduling system (msub).

• Interactive login: rztrona[2,5]
• pdebug: rztrona[6-7]
• Batch use: rztrona[8-20]

    MAXIMUM MEMORY SIZE AND DURATION OF JOBS ON RZTRONA
     ---------------------------------------------------------------
                            INTERACTIVE             BATCH
                           MEMORY    CPU          MEMORY   CPU
     rztrona[2,5]          128 GiB     30 min     - Interactive Only -
     rztrona[6-7] (pdebug) 128 GiB     30 min     - Interactive Only -
     rztrona[8-20](pbatch) - Batch Only -         128 GiB    7 days
     ---------------------------------------------------------------

In addition to these limits, each user is limited to a total of 90 cores, aggregated across all of their running jobs on Rztrona.

Interactive access to a batch node is allowed only while you have a batch job running on that node, and only for the purpose of monitoring your job. When logging into a batch node, be mindful of the impact your work has on the other jobs running on the node.

Multiple users can run on the same node.  If the number of cores is not specified, the job is allocated to one core.  Add this line to your batch script to use 36 cores, and get a node with no other users:
   

SBATCH SCRIPT:
        #SBATCH -n 36
        or
       #SBATCH --exclusive

MSUB SCRIPT:
        #MSUB -l ttc=36

ALWAYS use the msub -l ttc or sbatch -n 36 option when your job will use more than one task.

Scratch Disk Space: Consult RZ File Systems Web Page

Documentation

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

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