Two-Node Cluster With One Logical Host

The simplest SAP cluster configuration is a two-node cluster with one logical host, as illustrated in Figure 10-1. In this asymmetric configuration, the SAP central instance and database instance (collectively called the central system), are both placed on one node. NFS is also placed on the same node. This configuration is relatively easy to configure and administer. A drawback is that the backup node is underutilized. In case of failover, the central instance, database instance, and NFS service are switched to the backup node.

Figure 10-1 Asymmetric SAP Configuration