HP-UX System Administrator's Guide: Overview

for disaster tolerant architecture are followed. The maximum distance between nodes
in an extended distance cluster is set by the limits of the data replication and networking
technology used.
Sometimes referred to as an extended campus cluster, this cluster type services an area
approximately the size of a college or corporate campus.
Metropolitan Clusters
A metropolitan cluster is geographically dispersed within the confines of a metropolitan
area requiring right-of-way to lay cable for redundant network and data replication
components.
Sometimes referred to by the shorter term metrocluster, this cluster type services an area
approximately the size of a town or city, or several closely located cities.
Continental Clusters
A continental cluster is a group of clusters that use routed networks or common carrier
networks for data replication and cluster communication to support package failover
between separate clusters in different data centers. Continental clusters are often located
in different cities or different countries, and can span hundreds or even thousands of
miles.
Multiple Boot (One Single-Core Server, Multiple Operating Systems)
Or
HP Integrity Servers are capable of running multiple types of operating systems (for
example, HP-UX 11i, Linux, and Microsoft Windows). Depending on your server model,
multiple versions of these operating systems might also be supported.
If you only have a single available core, you cannot have multiple operating systems
running simultaneously. However, you can have multiple boot disks (or logical boot
volumes), each containing a different operating system, and you can choose which to
boot from on any given boot.
Multiple Boot (One Single-Core Server, Multiple Operating Systems) 37