Hitachi Advanced Database Setup and Operation Guide

17.2.1 Prerequisite software program

Cold standby configurations require HA Monitor.

HADB uses HA Monitor's monitor mode function to monitor failures in the active system. If a failure occurs in the active system, HA Monitor's hot standby function switches operation to the standby system.

For details on the host switching that takes place in the event of a failure, see 17.12 Operations when a failure occurs.

Note that depending on the version of Linux you are using, the prerequisite version of HA Monitor differs as follows: