| Attribute name | Example | Default |
| cluster-island | X | No default |
| Tag name | File | |
| /web-site | web-site.xml | |
Used when clustering the web tier between multiple Orion instances. If a cluster island id (number spawning from 1 and up) it will participate as a backend server in the specified island. If only one island is used the number is always one. An island is 2+ servers that share session failover state for replication.