Differences between the monitoring mechanisms

The HULFT Clustering function offers the following two types of monitoring mechanisms:

• Monitoring with the Start Synchronization function (Heartbeat mode)

• Monitoring with the heartbeat check function

The differences between the monitoring mechanisms are explained in Table 5.6 .

Table 5.6 Differences between Monitoring Mechanisms

Monitoring Mechanism	Advantages	Disadvantages
Monitoring with the Start Synchronization function	You will know immediately when the monitored daemon ends	You will not know if the daemon is in a state in which processing can be carried out successfully (*1)
	No load is placed on the daemon when monitoring
Monitoring with the heartbeat check function	You will know that the monitored daemon is in a state in which processing can be carried out successfully (*1)	Even if an error has occurred with the daemon, you will not know of the error until the next check is carried out
		A small amount of load is placed on the daemon when a monitor is carried out

*1

:

The term 'successful status' means that all requests of sending, receiving, and observation can be issued.

 

The mechanism used varies depending on the functions of the clustering software and the operation policy.

When the used clustering software can be configured with either of the above mechanisms, refer to Table 5.6 to select a suitable system according to the operation policy.