High availability function in the base operating system

Some cluster CL commands and all Cluster APIs exist in the base IBM® i.

Cluster commands

Cluster APIs

You can write your own custom application to configure and manage your cluster by using Cluster APIs. These APIs take advantage of the technology provided by cluster resource services provided as a part of IBM i. New enhanced functions are included in the IBM PowerHA® SystemMirror® for i commands which are provided by the IBM PowerHA SystemMirror for i licensed program.