SCF Reference Manual for the Kernel Subsystem

Figure 2 Process Creation Flow at System Startup
The $ZPM Persistence Manager
The $ZPM persistence manager is started and managed by the $ZCNF configuration utility process.
It is the first process started during a system load.
Based on information in the CONFIG system configuration database file located in the
$SYSTEM.ZSYSCONF subvolume, $ZPM starts all generic processes and optionally manages their
persistence. First it starts the subsystem managers during the KERNEL phase of system load. It also
automatically restarts them if they stop while the system is up.
Then, $ZPM starts user-configured generic processes. If these generic processes are configured to
automatically restart when stopped, $ZPM also restarts them. For more information, see “Persistence
Considerations” (page 45).
The $ZZKRN Kernel Subsystem Manager
Like the other subsystem managers, the $ZZKRN Kernel subsystem manager is a persistent generic
process. $ZZKRN configures and maintains the subsystem managers, user-configured generic
processes, some system attributes, and (through $ZSNET) the ServerNet X and Y fabrics. Figure 3
shows the $ZZKRN Kernel subsystem manager and the objects under its control.
Figure 3 SCF Architecture of the Kernel Subsystem
14 Kernel Subsystem Overview