ServerNet Cluster 6780 Planning and Installation Guide (G06.28+, H06.05+)

Table Of Contents
Glossary
ServerNet Cluster 6780 Planning and Installation Guide527301-005
Glossary-15
Measure
Measure. A tool used for monitoring the performance of a system. Measure can be used to
check the performance of a ServerNet cluster.
megabyte (MB). A unit of measurement equal to 1,048,576 bytes (1024 kilobytes). See also
gigabyte (GB), kilobyte (KB), and terabyte (TB).
message monitor process (MSGMON). A helper process for SNETMON that runs in each
processor on every node of a ServerNet cluster. MSGMON is started by $ZPM (the
persistence manager process). It performs duties for SNETMON in those instances
where SNETMON needs an agent in each system processor. In addition, MSGMON
monitors the connections within the processor and reports changes back to SNETMON
when required.
MFIOB. See multifunction I/O board (MFIOB).
mirrored disk or volume. A pair of identical disk drives that are used together as a single
logical volume. One drive is considered primary, and the other is called the mirror.
Each byte of data written to the primary drive is also written to the mirror drive. If the
primary drive fails, the mirror drive can continue operations. See also volume.
modular ServerNet expansion board (MSEB). A ServerNet expansion board (SEB) that
uses plug-in cards (PICs) to provide a choice of connection media for routing
ServerNet packets in a NonStop S-series server. See also ServerNet expansion board
(SEB).
module. (1) Part of the group, module, slot naming convention for uniquely identifying the
logical location of a component within a system. A module is a subset of a group, and it
is usually contained in an enclosure. A module contains one or more slots. A module
can consist of components sharing common interconnect, such as a backplane, or it
can be a logical grouping of components performing a particular function. See also
group. (2) A set of I/O devices or services that share a common protocol and can be
controlled by a single module driver in the extensible I/O (XIO) subsystem.
MRouter. A field-programmable gate array (FPGA) or application-specific integrated circuit
(ASIC) that is part of the serial maintenance bus (SMB) architecture. The MRouter
distributes the SMB throughout a group.
(M)SEB. SEB or MSEB. See ServerNet expansion board (SEB)
and modular ServerNet
expansion board (MSEB).
MSEB. See modular ServerNet expansion board (MSEB).
MSEB CBB. See MSEB common base board (CBB).
MSEB common base board (CBB). In modular ServerNet expansion boards (MSEBs), the
printed wiring assembly (PWA) into which plug-in cards (PICs) are installed.