Prism Central (PC)

• Multi-cluster manager responsible for managing multiple Acropolis Clusters to provide a single, centralized management interface.  Prism Central is an optional software appliance (VM) which can be deployed in addition to the Acropolis Cluster (can run on it).
• 1-to-many cluster manager
• Recommended for larger sites (more than one cluster/multiple sites)

Prism Element (PE)

• Localized cluster manager responsible for local cluster management and operations.  Every Acropolis Cluster has Prism Element built-in.
• 1-to-1 cluster manager

• Prism services run on every CVM
• 1 leader responsible for all HTTP requests
  • New leader elected if failure
• CVM that is not the leader redirects to leader via 301
• 80 and 9440 (80 redirects to HTTPS on 9440)
• Recommended cluster external IP is used
• If failure, gARP used