domain A set of one or more system boards that acts as a separate system capable of booting the operating system and running an operating system independently of any other domains. Domains that share a system are characteristically independent of each other.

Each domain is based on the logical system board that is assigned to it. Further, each domain is electrically isolated into hardware partitions, which ensures that any failure in one domain does not affect the other domains in the server.

Domain - SP

Communication

Protocol (DSCP) Protocol which provides a user-level to user-level TCP/IP sockets type communication between the Service Processor and a domain. This communication occurs over a mailbox type of communication provided by other software components.

DSCP See Domain - SP Communication Protocol (DSCP).

dynamic

reconfiguration (DR) Enables logical attachment and detachment of system boards to and from the system without causing system downtime. This is the process of physically installing or removing a system board while the Solaris OS is running.

Enables boards to be electrically isolated (deleteboard) from a domain so they can be physically removed from the system or added to a different domain; or to be electrically reattached (addboard) so they can be inserted into a running server or assigned to a different domain.

environmental

monitoring The monitoring done through a large number of sensors that monitor temperature, voltage, and current. The Service Processor software polls devices in a timely manner and makes the environmental data available. The Service Processor shuts down various components to prevent damage.

eXtended system board

(XSB) eXtended System Board combines the hardware resources of a physical system board. The SPARC Enterprise servers can generate one or four XSB(s) from one physical system board: Uni-XSB and Quad-XSB.

eXtended System

Control Facility

(XSCF) The software that runs on the Service Processor and provides control and monitoring functions for the system platform.

failover Process by which the active Service Processor transfers control to the standby Service Processor or the standby Service Processor takes control over from the active Service Processor. In either case, the previously standby Service Processor becomes the active and the active Service Processor becomes the standby.

104 SPARC Enterprise Mx000 Servers Administration Guide • November 2007