ServerNet Cluster Manual

SCF Commands for SNETMON and the ServerNet
Cluster Subsystem
ServerNet Cluster Manual—520575-003
8-4
ServerNet Cluster Subsystem Start State
(STARTSTATE Attribute)
ServerNet Cluster Subsystem Start State
(STARTSTATE Attribute)
The start state configuration (STARTSTATE attribute) of the SCL subsystem SUBSYS
object controls the way in which the ServerNet cluster monitor process joins the
system to the ServerNet cluster.
The ServerNet cluster monitor process (SNETMON) is usually launched automatically
by the Persistence Manager ($ZPM) as soon as any of the processors configured for
the ServerNet cluster monitor process are reloaded (assuming the ServerNet cluster
monitor process is configured with the STARTMODE attribute set to SYSTEM).
Once the ServerNet cluster monitor process is started, it checks the SUBSYS object
start state (STARTSTATE attribute) to determine whether to automatically bring the
ServerNet cluster subsystem to the STARTED logical state. Even though the
ServerNet cluster monitor process is running, the system does not join the ServerNet
cluster until the ServerNet cluster subsystem is in the STARTED logical state.
Figure 8-1. ServerNet Cluster Subsystem States
Note. Do not confuse the PROCESS object STARTMODE attribute with the SUBSYS object
STARTSTATE attribute. The STARTMODE attribute controls the way the Persistence Manager
launches the ServerNet cluster monitor process. (See the ADD PROCESS command
description in the SCF Reference Manual for the Kernel Subsystem.)
vst011.vsd
ServerNet Cluster Subsystem
States
STOPPING
STARTED
STARTING
STOP
STOP
START
STOPPED