CAM3 on bluesky

[yjinho@atmos_umd_edu]

Dear CAM users:

I'd like to know what would be the optimized # of nodes
and # of tasks per node. In 'run-ibm.csh', # of node =2
and # of task has to set 1. Is this the optimized one
(means.... less time and also less GAU)?

Anyhow, I may have to do some testing by myself.
But, your suggestion will be greatly helpful!

Thanks,

Jinho

 

[rneale]

A tried and tested configuration using 1 node (32 processors) on bluesky is 8 task per node with 4 threads per task
This involves setting the following in the job script for batch jobs (for regular production jobs)

#@ class = csl_rg32
#@ tasks_per_node = 8
#@ node = 1

and the environment variable

setenv OMP_NUM_THREADS 4

The GAU usage per model year will be about 35 GAUs for a typical T42 L26 run in a standard configuration.