ServerNet Cluster 6780 Operations Guide (G06.28+, H06.05+)

Glossary
ServerNet Cluster 6780 Operations Guide—525606-003
Glossary-26
SMN
SMN. The mnemonic name for the external system area network manager process
(SANMAN). See system area network manager process (SANMAN).
SNETMON. See ServerNet cluster monitor process (SNETMON).
soft reset. An action performed on a cluster switch that restarts the firmware on the switch
but does not interfere with ServerNet passthrough data traffic.
software product revision (SPR). A method of releasing incremental software updates on
NonStop S-series systems. An SPR can include one or more corrections to code, or it
can contain code that adds new function to a software product.
source ServerNet ID (SID). A field in the ServerNet packet header indicating the source of
the packet.
SP. See service processor (SP).
split-star topology. A network topology that uses up to two cluster switches for each
external fabric. External routing is implemented between the two starred halves of a
ServerNet cluster. (A starred half consists of up to eight nodes attached to one set of
cluster switches.) The starred segments are joined by four-lane links. Introduced with
the G06.12 RVU of the ServerNet cluster product, the split-star topology supports up to
16 nodes. A split-star topology requires HP NonStop Cluster Switches (model 6770).
See also star topology and tri-star topology.
SPR. See software product revision (SPR).
star group. One set of X and Y cluster switches and the ServerNet nodes (up to eight) that
are connected to them. A star group can be thought of as a segment of a split-star or
tri-star topology. A split-star topology can contain up to two star groups. A tri-star
topology can contain up to three star groups.
star topologies. The network topologies for ServerNet clusters using the HP NonStop
Cluster Switch (model 6770). The three star topologies are the star topology
, the split-
star topology, and the tri-star topology. See also layered topology.
star topology. A network topology in which all nodes are connected to a central hub
(cluster switch). Each node has its own connection to the network, so a break in the
connection does not affect other nodes in the network. In a ServerNet cluster, a star
topology requires one cluster switch for each external fabric and can support up to
eight nodes. A star topology requires HP NonStop Cluster Switches (model 6770).
See also split-star topology and tri-star topology.
state. In the Subsystem Control Facility (SCF), one of the generally defined possible
conditions of an object with respect to the management of that object. Examples of
states are DEFINED, STARTED, and STOPPED.
STFs. See super time factors (STFs).