NonStop S-Series Server Description Manual (G06.24+)

Glossary
HP NonStop S-Series Server Description Manual—520331-003
Glossary-89
ServerNet adapter
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.
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).