ACC Utilities Reference Guide

216 Chapter10

ZMASTERD - Daemon Monitoring Feature

Bringing Up the ACC Subsystem

The ACC Subsystem is brought up by running zmasterd with no

runstring parameters or with the cold <file> parameters. T his causes

zmasterd to read the zmasterd_list and take the following actions:

1. Zmasterd checks to see if the zmasterd daemon is already running in

the system. If the zmasterd daemon is already active and zmon cold

has been scheduled successfully, the second invocation of zmasterd

will exit. If zmon cold has not been invoked, the second invocation of

zmasterd will behave like the first invocation of zmasterd (described

as follows).

2. Zmasterd will read the file /opt/acc/cfg/zmasterd_list,ifitexists.

3. Zmasterd will start zmlog.Ifthezmasterd_list does not exist, or if it

exists and zmlog is not listed in a start statement, it will start zmlog

with no runstring parameters. If there is a start statement in the

zmasterd_list file, it will be started with the runstring parameters

giveninthestart statement.

4. If the zmasterd_list file does not exist or if the file exists and there is

no start statement for zmon and the cold <file> parameters are not

given in the command line,zmon cannot be started, which means that

the ACC Mux Subsystem cannot be s tarted. Zmasterd will just

monitor zmlog.Itwillwaittoberunwiththestop, act, deact, cold

<file> parameters, or with no parameter (see 1 above).

If the zmasterd_list file does exist, and it does contain a start

statement for zmon, it will start zmon with the given parameter list.

However, the cold <file> parameters override the start statement for

zmon in zmasterd_list.Ifzmon does not start successfully, zmasterd

will not start any of the other daemons listed in the st art statements

in zmasterd_list. Again, it will just monitor zmlog,andwaittoberun

with the stop, act, deact, cold <file> parameters or no parameter.

If zmon can be started successfully, zmasterd cannowbeginstarting

and monitoring the daemons listed in the start statements in

zmasterd_list.