Heartbeat mode
In this mode, the command monitors whether the daemon is successfully started and running as a resident process. The monitoring continues until the end of the daemon.
The startup flow of a daemon in Heartbeat mode is explained in Figure 2.4 .
1) Running of the start synchronization command
The start synchronization command for each daemon issues a daemon start request to the corresponding daemon.
2) Daemon startup
The daemon starts.
3) Daemon termination
The daemon accepts the termination request and then terminates.
4) Notification of daemon termination
After each of the daemons terminates, the start synchronization command for the daemon is notified of the result and then the command terminates.