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

Glossary
ServerNet Cluster 6780 Operations Guide—525606-003
Glossary-31
WAN
WAN. See wide area network (WAN).
wide area network (WAN). A network that operates over a larger geographical area than a
local area network (LAN)—typically, an area with a radius greater than one kilometer.
The elements of a WAN might be separated by distances great enough to require
telephone communications. Contrast with local area network (LAN).
wild-card character. A character that stands for any possible character or characters in a
search string or in a name applying to multiple objects. In Subsystem Control Facility
(SCF) object-name templates, two wild-card characters can appear: ? (question mark)
for a single character and * (asterisk) for zero or more consecutive characters.
wormhole routing. A technique for reducing network latency in a router. Packet bytes are
immediately switched to the appropriate output port as soon as they arrive, rather than
accumulated in a buffer until an entire packet has been received. Contrast with store
and forward routing.
X fabric. The X side of the internal or external ServerNet fabrics. See also fabric, external
ServerNet X or Y fabric, and internal ServerNet X or Y fabric.
Y fabric. The Y side of the internal or external ServerNet fabrics. See also fabric, external
ServerNet X or Y fabric, and internal ServerNet X or Y fabric.
zone. See cluster switch zone.
$ZPM. The process name for the persistence manager process that starts generic
processes in G-series RVUs and manages their persistence.
ZSCL. See ServerNet cluster subsystem.
ZSMN. The subsystem identifier for the external system area network manager process
(SANMAN). See also external system area network manager process (SANMAN).
$ZZFOX. The name of the Fiber Optic Extension (FOX) monitor process in the
ServerNet/FX adapter subsystem.
$ZZKRN. Kernel subsystem manager process. The generic process that starts and
manages other generic processes, some system attributes, and the ServerNet X and Y
fabrics in G-series RVUs. $ZZKRN is started and managed by the $ZPM persistence
manager process.
$ZZSCL. The process name for the ServerNet cluster monitor process.
$ZZSMN. The process name for the external system area network manager process
(SANMAN). See also external system area network manager process (SANMAN).