Use of Login Nodes and Debug Queue
Use of Login Nodes
LCRC login nodes are primarily for managing files in the project and home directories, editing files, submitting/monitoring jobs in the queue and compiling short codes/applications. Please do not run jobs on the login nodes. Not only do they slow down the system for other users but can also bring down the login node. Use the debug queue for testing and running short jobs or the batch queue for running long production jobs. The debug queue can be used in both the interactive mode and the batch mode.
Use of Debugging Queue
The debug queue (named bdws on the Bebop cluster) has 8 broadwell nodes with a maximum time-limit of 1 hour. This queue is to be used only for debugging applications, testing the scaling/timing of a code/problem or checking to see if a new problem has been correctly set-up (proper input parameters, I/O file names etc). This queue is also extensively used by the LCRC staff to test new capabilities/codes, system performance, and address user issues. Please do not run hour-long production jobs on this queue. It is also recommended that users limit the maximum job size to 4 nodes whenever possible.