NonStop S-Series Planning and Configuration Guide (G06.25+)

Glossary
HP NonStop S-Series Planning and Configuration Guide—523303-015
Glossary-91
serial maintenance bus (SMB) domain
serial maintenance bus (SMB) domain. The set of enclosures, modules, field-replaceable
units (FRUs), and customer-replaceable units (CRUs) connected by a common serial
maintenance bus (SMB).
server. (1) An implementation of a system used as a stand-alone system or as a node in an
Expand network. (2) A combination of hardware and software designed to provide
services in response to requests received from clients across a network. For example,
HP NonStop™ servers provide transaction processing, database access, and other
services. (3) A process or program that provides services to a client or a requester.
Servers are designed to receive request messages from clients or requesters; perform
the desired operations, such as database inquiries or updates, security verifications,
numerical calculations, or data routing to other computer systems; and return reply
messages to the clients or requesters. A server process is a running instance of a
server program.
server application. An application that provides a service to a client application. An
application that provides local execution of remote procedure calls is an example of a
server application.
ServerNet. A communications protocol developed by HP that is used in HP NonStop™
S-series servers. See also ServerNet I
and ServerNet II.
ServerNet I. The first-generation ServerNet network. ServerNet I architecture is used in
current HP NonStop™ S-series servers and other products. It features 50
megabytes/second speed, 6-port ServerNet routers, 8b/9b encoding, and a 64-byte
maximum packet size. See also ServerNet II
.
ServerNet II. The second-generation ServerNet network. ServerNet II architecture is
backward-compatible with ServerNet I architecture, and it features 125 (or 50)
megabytes/second speed, 12-port ServerNet routers, 8b/9b and 8b/10b (serializer
ready) encoding, and a 512-byte maximum packet size. See also ServerNet I
.
ServerNet adapter. A component that connects peripheral devices to the rest of the system
through a ServerNet bus interface (SBI). A ServerNet adapter is similar in function to
an I/O controller logic board (LB) and backplane interconnect card (BIC) in HP
NonStop™ K-series servers.
ServerNet address. A virtual memory address that, when translated to a physical address,
indicates where the memory access needed by a ServerNet transaction begins. In
some cases, the translation can point to some entity other than memory, such as a
register. The ServerNet address is included in all ServerNet read request and write
request packets.
ServerNet addressable controller (SAC). An I/O controller that is uniquely addressable by
a ServerNet ID in the ServerNet fabrics. A SAC is typically implemented on some
portion of a processor multifunction (PMF) customer-replaceable unit (CRU), an I/O
multifunction (IOMF) CRU, or a ServerNet adapter.