Linux on System z provides enormous opportunities for cost saving, which result from its outstanding capabilities for workload deployment and IT infrastructure simplification.The key areas of potential cost savings are:●●●Software licenses and support costs●●●A single System z processor can run a mass of Linux applica-tions, and Linux software is usually priced on a per-processor basis. Running software on fewer processors can result in fewer licenses and support costs.●●●Operational and maintenance efforts●●●The centralized management and autonomic computing capabilities of the Linux on System z environment can help reduce the errors and minimize workload-balancing tasks that otherwise can consume IT staff hours.●●●Floor space and energy consumption●●●Fewer servers and networks can require less floor space and can mean savings in acquisition costs, heating, air conditioning and electricity costs.●●●Business continuity costs●●●The suite of the System z built-in features can rapidly respond to, or even anticipate, threats to system health, helping to prevent costly system downtime. As well, multiple disaster recovery solutions are available, such as copying volumes or mirroring disk volumes within one site or between two sites.
See: http://public.dhe.ibm.com/common/ssi/ecm/en/zsd01241usen/ZSD01241USEN.PDF
