There are 2 mpi queues for parallel computing at SLAC, bulletmpi and bulletmpi-large.  You will need to send email to unix-admin to request access to these queues.  Jobs submitted to these queues use some of the same batch hosts that are in use by the general farm.  

• bulletmpi allows jobs to request between 8 and 512 cores
• bulletmpi-large allows jobs between 513 and 2048 cores

Single slot jobs are not allowed in these queues.