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

Glossary
HP NonStop S-Series Planning and Configuration Guide—523303-015
Glossary-92
ServerNet buffer board (SBB)
ServerNet buffer board (SBB). The board that provides the ServerNet connection to and
from the I/O multifunction (IOMF) customer-replaceable unit (CRU). This board
replaces the processor and memory board (PMB) in the IOMF CRU.
ServerNet bus interface (SBI). The I/O control and expansion packetizer application-
specific integrated circuit (ASIC).
ServerNet cable. A cable that provides ServerNet links between system enclosures.
ServerNet cluster. A network of servers (nodes) connected together using the ServerNet
protocol for interprocessor communication across a cluster and within its nodes. A
ServerNet cluster offers linear system expansion beyond the 8-processor or
16-processor limits of a single server, achieving comparable speeds for internal and
external ServerNet communication. See also cluster
and HP NonStop™ ServerNet
Cluster (ServerNet Cluster).
ServerNet Cluster. See HP NonStop™ ServerNet Cluster (ServerNet Cluster).
ServerNet cluster monitor process (SNETMON). A process pair with the process name
$ZZSCL that manages the state of the ServerNet cluster subsystem. Each node
(system) in a ServerNet cluster must have one SNETMON process pair running.
ServerNet cluster services. The functions necessary to allow a node to join, participate in,
or leave an HP NonStop™ ServerNet Cluster. These functions include monitoring and
control of the physical connections to the cluster, discovery of other nodes in the
cluster, and automatic recovery of failed connections.
ServerNet cluster subsystem. The subsystem managed by the ServerNet cluster monitor
process (SNETMON). The subsystem name is SCL. The subsystem number is 218.
The subsystem identifier is ZSCL.
ServerNet/DA. See ServerNet device adapter (ServerNet/DA).
ServerNet device. Interface logic that is associated with a specific hardware unit, such as a
processor or I/O adapter, and that provides the interface to the ServerNet
communications network. The responsibilities of the ServerNet device are to transform
message data into ServerNet packets, to transmit those packets, to receive ServerNet
packets, and to unpack the data on behalf of the associated hardware unit. See also
ServerNet subdevice
.
ServerNet device adapter (ServerNet/DA). A ServerNet adapter that controls external
devices. The 6760 ServerNet/DA contains up to four ServerNet addressable controllers
(SACs), each of which can control either disk drives or tape drives.
ServerNet device ID. See ServerNet ID.
ServerNet diagram. A graphical layout of the logical connections between objects in the
system. These objects can include processors, ServerNet routers, ServerNet adapters,
disks on the SCSI bus, and so on.