SubMIT is a batch submission interface to on- and off-campus computing resources. It uses HTCondor as the batch job management system and uses its "flocking" mechanism to connect multiple computing clusters into a single pool. At most clusters, jobs submitted from SubMIT runs "opportunistically", i.e., with lower priority than the jobs which use the clusters as dedicated resources.
Cluster composition is transparent to the users, but the users can choose the resource to use if needed. Currently available clusters are: Open Science Grid (OSG); CMS analysis pool (open to CMS collaborators only); Engage HPC at MIT Earth, Atmospheric, and Planetary Sciences; T2_US_MIT; and T3_US_MIT.