DB2
DB2 is able to provide availability in two ways. First, with the partitioning capability of DB2 UDB EEE (v7.X) or DB2 UDB ESE (v8.X with DPF). DB2 also provides HA support with Sun Cluster and Veritas Cluster Server. The agent needed for Sun Cluster is included with the DB2 UDB software.
The following whitepapers are available to assist with setup of DB2 with Sun Cluster:
Informix
The following whitepaper is available to assist with setup of Informix IDS with Sun Cluster:
Enterprise Content Manager
The following whitepaper is available as a reference for how to configure Enterprise Content Manager with Sun Cluster: