A switchover differs from a failover in how the request is initiated. A switchover is a user request, via a program or the cluster manager interface, to switch the primary access point for resources in a CRG from the specified node to a backup node. The backup node to use is determined by the current recovery domain.
Switchovers are typically requested in order to perform system maintenance, such as applying program temporary fixes (PTFs), installing a new release, upgrading the system, or to test the switching process.
The relationships between CRGs must be considered when specifying the order in which to switchover multiple CRGs.
Figure 9.Simple switchover example in a two-node cluster, illustrating IP takeover for applications
