db2haicu stands for db2 high availability instance configuration utility.Db2 V9.5 has integrated HA feature which needs to be configured and maintained using db2haicu.
From version 9.5 there is no necessity to install heartbeat scripts seperately.Heartbeat scripts come with HADR and they need to be set up using db2haicu.
When db2haicu is run for the first time,it will search the database system for database configuration that is related to cluster configuration.Then it creates a cluster domain for instance if it does not exist.
db2haicu maintainance mode::
db2haicu will be run in maintainance mode once the cluster domain is created.Cluster elements such as databases or cluster nodes can be added or removed in maintainance mode.Also the failover mechanism can be defined using db2haicu in maintainance mode.
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