Sun Grid Engine (SGE)
On multi-user and multi-tasking cluster the resources should be
managed through a queue scheduling system, such as SGE, LSF, PBS, Condor.
Sun Grid Engine daemons
Master host:
controls queues
jobs
schedules on the whole cluster
Computational hosts run jobs
The sge_qmaster daemon opens TCP port 536; sge_execd opens TCP port 537.