Configuring a Mirror Virtual IP (VIP)
As described in Planning a Mirror Virtual IP (VIP), you can configure a mirror virtual address that allows external applications to interact with the mirror using a single address, ensuring continuous access on failover.
After configuring InterSystems IRIS for the mirror VIP and then configuring the mirror VIP, perform failover tests by gracefully shutting down the current primary (as described in Planned Outage Procedures) to ensure that applications can continue to connect to the mirror regardless of which failover member is primary.
Configuring InterSystems IRIS for a Mirror VIP
To ensure that the Management Portal and Studio can seamlessly access the mirror regardless of which failover member is currently the primary, it is recommended that the failover members be configured to use the same superserver port number.
The application servers in a distributed cache cluster with mirrored data server do not use a mirror’s VIP. When adding a mirror as a data server (see Configuring Application Server Connections to a Mirror), do not enter the virtual IP address (VIP) of the mirror, but rather the DNS name or IP address of the current primary failover member. Because the application server regularly collects updated information about the mirror from the specified host, it automatically detects a failover and switches to the new primary failover member. For this reason, both failover members and any DR async members must be prepared a data servers with the same Maximum number of application servers setting; see Configuring Application Server Connections to a Mirror for further distributed caching considerations.
When configuring one or both failover members as license servers, as described in Managing InterSystems IRIS Licensing, specify the actual hostname or IP address of the system you are configuring as the Hostname/IP Address; do not enter the VIP address.