Configuring an IBM HyperSwap topology system

A HyperSwap® topology system assists with high availability and site disaster recovery. A HyperSwap topology system can be configured through site allocation and topology change command-line (CLI) commands. The management GUI configures a HyperSwap topology with the Modify System Topology wizard, which guides you through all the steps easily.

Before you begin

If you are using RDMA-capable Ethernet ports to connect nodes in a HyperSwap system, you must ensure all prerequisites are complete and define all RDMA-capable Ethernet ports before configuring the HyperSwap system. For information, see the topics on Configuration details for using RDMA-capable Ethernet ports to connect nodes and Configuring a system with RDMA-capable Ethernet ports.

About this task

The wizard sets the system as a HyperSwap system and easily defines sites for nodes, hosts, and storage systems. It also defines bandwidth settings for copy operations that are used by the HyperSwap volumes. To access the Modify System Topology wizard, select Monitoring > System. In the Actions menu, select Modify System Topology.

Creating a HyperSwap topology in the command-line interface requires that you define sites for the nodes, hosts, storage systems, and bandwidth settings separately. After these settings are configured, you can define the HyperSwap system topology.

Note: Although the topology of a system can be changed from stretched to hyperswap, the procedure for doing so is complex. It is advisable to decide what topology to use when you plan the system, before a topology is created. Contact your support center for guidance on changing the topology of an existing system.