• Lower support costs (e.g. software need to be installed only once).
• Easier data management.
• Better resources optimization (the system load distributes among different CPUs).
• Lower network traffic
  • Hard disks, tape drivers, etc. are mounted on local SCSI bus, so that data transfering between CPUs and mass storages never flow accross the network. Also CPUs are freed from network data transfer tasks (in distributed systems, instead, I/O from/to remote-mounted file systems flows along the network and require local and remote CPU activity).
  • The traffic between server and X-terminals (clients) is actually very low. It consists mainly of user commands and screen output (either text or graphics primitives to be interpreted by X-terminal graphic coprocessor). The possibility to run local windows managers on the X-terminals itself further reduces network load.
• Centralyzed multiprocessor machines may work:
  • either as parallel machines running the same application through several processors;
  • or as multiple single-processor machine, running different applications on different processors with load balancing capability.

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