The System Service Processor (often abbreviated as SSP) is a SPARC-based computer that is used to control the Sun MicrosystemsEnterprise 10000 platform. The term SSP is often used to describe both the computer hardware and the software that are necessary to accomplish this task.
The System Service Processor software provided for the following functionality:
Environmental monitoring and automated domain-shutdown in the event of an out-of-bounds condition, such as a CPU getting too hot.
The creation and destruction of domains
The ability to boot domains
Domain console device
Dynamic Reconfiguration of domains, in which CPU, memory, and/or Input-Output boards are added to or removed from a running domain.
Assign multiple paths to Input-Output devices for increased availability
Monitor and display platform environmental statistics, such as the temperatures, currents, and voltages present on System Boards
Monitor and control power flow to the platform components such as System Boards and Control Boards
Power On Self Test and similar platform diagnostics
Logging and Notification for various platform events
The creation and destruction of Inter Domain Networks (IDNs) which allow for TCP/IP connectivity between domains, across the platform's centerplane.
Support for a dual power-grid option
Several utilities were provided with the SSP software packages, including hostview, a program that provided an X Window System interface for platform maintenance, and several CLI programs.
Normally, two System Service Processors were used per platform. One was configured as Main and the other as Spare. Only the SSP in the role of Main could control the platform at any given time. Failover between Main and Spare was performed automatically by the SSP software.
