How failover works
A cluster's ability to redirect requests from one server to another is called failover. When a user tries to access a database on a server that is unavailable or in heavy use, Domino connects the user to a replica of the database on another server in the cluster.
The Cluster Manager on each cluster server sends out probes to each of the other cluster servers to determine the availability of each server. The Cluster Manager also checks continually to see which databases and replicas are available on each server. When a user tries to access a database that is not available, the Cluster Manager redirects the user request to a replica of the database on a different server in the cluster. Although the user connects to a database on a different server, failover is transparent to the user.
1. A Notes user attempts to open a database on Server 1.
2. Notes realizes that Server 1 is not responding.
3. Instead of displaying a message that says the server is not responding, Notes looks in its cluster cache to see if this server is a member of a cluster and to find the names of the other servers in the cluster. (When a Notes client first accesses a server in a cluster, the names of all the servers in the cluster are added to the cluster cache on the client.)
4. Notes accesses the Cluster Manager on the next server listed in the cluster cache.
5. The Cluster Manager determines which server in the cluster contains an available replica of the desired database.
6. The Cluster Manager communicates this information to Notes, and Notes opens the replica.
Die IP wird wohl aus dem Domino Directory kommen.
Andreas