CLUSTERS

Setting up failover for IMAP
Because IMAP requires unique identifiers for mail messages, you cannot use replicas of a database with IMAP. You have to access the same database each time. Therefore, you should use operating system clusters if you want to set up failover for IMAP.

The following figure shows an active-active operating system cluster. Each node has an IMAP server running in one Domino partition. The other partition contains a copy of the resources of the active partition on the other server. If either node fails, the other node takes over and runs both IMAP servers in different partitions.

Cluster for IMAP failover