Initial cluster planning
This section describe the initial steps you take to plan a PowerHA® SystemMirror® cluster to make applications highly available.
Before you start PowerHA SystemMirror planning, make sure that you understand the concepts and terminology relevant to PowerHA SystemMirror.
A PowerHA SystemMirror cluster provides a highly available environment for mission-critical applications. In many organizations, these applications must remain available at all times. For example, a PowerHA SystemMirror cluster could run a database server program that services client applications, keeping it highly available for clients that send queries to the server program.