ServerNet Cluster Manual

ServerNet Cluster Description
ServerNet Cluster Manual—520575-003
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ServerNet Cluster Software Overview
ServerNet Cluster Software Overview
ServerNet clusters use the following software components:
•
SNETMON and the ServerNet cluster subsystem
•
MSGMON
•
NonStop Kernel message system
•
SANMAN
•
Expand
•
OSM or TSM software
•
SCF
SNETMON and the ServerNet Cluster Subsystem
SNETMON is the Subsystem Programmatic Interface (SPI) server for ServerNet
cluster subsystem-management commands. It monitors and responds to events
relevant to ServerNet cluster operations, and it manages the ServerNet cluster
subsystem. SNETMON is a fault-tolerant process pair. An SNETMON process pair
exists on every node in a functioning ServerNet cluster. Total failure of the SNETMON
process spawns a new SNETMON.
SNETMON Summary
The following list summarizes information about SNETMON:
SNETMON Functions
SNETMON has multiple functions:
•
Manages the state of the ServerNet cluster subsystem
•
Detects the presence of other systems in the ServerNet cluster and establishes the
ServerNet message-system connections
•
Supports the Expand-over-ServerNet line handlers with the Network Access
Method (NAM) protocol
•
Monitors and responds to events that affect the message-system connections,
such as processor failures, reloads, and path events
Process Description ServerNet cluster monitor process
Abbreviation SNETMON
Generic Process Name
(Recommended)
$ZZKRN.#ZZSCL
Process Pair Name $ZZSCL
Product Number T0294
Program File Name $SYSTEM.SYSnn.SNETMON