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

ServerNet Cluster 6780 Operations Guide—525606-003
A-1
A ServerNet Cluster Software
This section describes the software components of a ServerNet cluster including:
NonStop Kernel Message System on page A-1
MSGMON on page A-2
SANMAN Subsystem on page A-2
ServerNet Cluster Subsystem on page A-3
SNETMON on page A-3
Expand-Over-ServerNet Line-Handler Processes on page A-5
Figure A-1 is a logical diagram that shows the interaction of ServerNet cluster
processes.
NonStop Kernel Message System
The NonStop Kernel message system provides the set of privileged application
program interfaces (APIs) for interprocessor communication between processes
residing on the same or on different nodes. The message system allows interprocessor
communication between distinct nodes over the external ServerNet fabrics.
Figure A-1. ServerNet Cluster Logical Diagram
SNetMon
OSM
SCF
EMS
Collectors
($0, $ZLOG)
NRT
NCP
Service
Processor
MsgMon
Message System
Events
SPI
SPI
Events
Status/
Commands
One Expand-Over-
ServerNet Line-Handler
Process for Each
Remote System
NAM
NAM
Line
Handler
Line
Handler
SANMAN
Application
SPI
File System
VST512.vsd