LabQi Cluster Decommissioning

MSI's LabQi Cluster will be shut down and decommissioned during February Maintenance (February 5, 2020). Several months ago, MSI released the Mesabi Interactive Queue as a replacement for the LabQi Cluster (ssh lab). The Mesabi Interactive Queue can be used in real-time for tasks such as interactive data exploration, creating plots or images, visualizations, or testing sections of code that will be used on other MSI queues.

Here are several examples of how you can request an interactive HPC job on the new Mesabi Interactive Queue.

The basic syntax for submitting an interactive job on Mesabi:

qsub -l nodes=1:ppn=4,mem=8gb,walltime=12:00:00 -q interactive -I

The basic syntax for testing MPI code between 2 nodes:

qsub -l nodes=2:ppn=2,mem=8gb,walltime=12:00:00 -q interactive -W x=nmatchpolicy:exactnode -I

The basic syntax for creating a job with X-forwarding for GUI's and visulization:

qsub -X -l nodes=1:ppn=4,mem=8gb,walltime=12:00:00 -q interactive -I

The full specifications of the Mesabi Interactive Queue can be found on the MSI Queues webpage. Also, more examples on how to use qsub -I for interactive use can be found on the webpage Interactive queue use with qsub.

If you have any questions about what these changes mean for your or your group or need assistance, please contact the MSI Help Desk through our online Support Request Form, via email at, or by calling 612-626-0802.