Vendors and industry analysts use a variety of differing terms to describe high availability concepts. IBM® uses the terms server farms and server clusters to distinguish between these two different technologies.
| Vendor or analyst | Term for server farm | Term for server cluster |
|---|---|---|
| Oracle | WebLogic Server cluster | Not applicable |
| Gartner Group | Web server cluster | Application server cluster, database cluster |
| IBM | WebSphere® server group of clones; also cluster | Cluster |
| Symantec | Parallel group | Failover group |