Why do we need a batch system?

Manage individual CPUs and do load balancing and job monitoring and control across the cluster (faster CPUs are loaded first).
Fair Share scheduling
- on PDSF STAR users have to share with other groups (~70%)
- this works to everybody’s advantage (prior to last QM STAR got between 90% and 100% of the cluster).
Shares and priorities dynamic priority = (number of shares)/ ((1+number of jobs running)*RUN_JOB_FACTOR + (total run time of jobs in execution)*RUN_TIME_FACTOR))

Manage individual CPUs and do load balancing and job monitoring and control across the cluster (faster CPUs are loaded first).