Implementing high availability with a task-based approach
The task-based approach to configuring and managing i5/OS high availability allows you to configure and manage a customized high-availability solution based on your business needs. Graphical and command-line interfaces are used for configuring and managing your high-availability solution.
Unlike the solution-based approach, which uses the High Availability Solution Manager graphical interface, where a predefined solution is configured automatically with limited user input, the task-based approach gives the knowledgeable user the means to customize and implement a personalized solution. However, to create and manage a high-availability solution with this approach, users need to have a good understanding of their high availability needs and be familiar with several interfaces.
Cluster Resource Services graphical interface
The Cluster Resource Services interface allows you to configure and manage cluster technologies, which are integral to a high-availability solution. To use this interface the IBM® PowerHA® for i (iHASM) licensed program 5770-HAS installed. With this interface you can perform the following functions:
- Create and manage a cluster
- Create and manage nodes
- Create and manage cluster resource groups
- Create and manage cluster administrative domains
- Create and manage monitored resources
- Monitor the cluster for cluster related events, such as cluster partitions and failovers
- Perform manual switchovers for planned outages, such as scheduled maintenance to a system
Disk Management interface
The Disk Management interface allows you to configure and manage independent disk pools which are necessary when implementing several data resiliency technologies. Depending on the type of data resiliency technology that is implemented, installation requirements might be necessary to use some of these functions:
- Create a disk pool
- Make a disk pool available
- Make a disk pool unavailable
- Configure geographic mirroring
- Configure metro mirror
- Configure global mirror
Command line interface
The command line interface allows you to perform many different high availability tasks with CL commands. For each cluster-related task the corresponding CL command has been identified.