Change hostname logic to use uname() rather than gethostname() and permit
    hostnames to contain ".".

and use that for enforcement

Add job and task memory limits to job step credential
Add enforcement of job and task memory limits to job accounting and 
  abort job that exceeds the limit

    sbatch commands.

a job immediately

processing

attempt to backfill on dedicated nodes before using shared nodes
   (if sharing is supported by job/partition)