HP-UX System Administrator's Guide: Overview

as all copies of the package contents remain running. All
copies of System Multi-node packages halt if even one of
the copies in the cluster halts. System Multi-node packages
do not fail over. HP supports them only for specific
applications.
Serviceguard clusters use TCP/IP networking services for reliable communication
among nodes in the cluster. This includes heartbeat messages (signals from each
functioning node that are central to the operation of the cluster).
Tools to Administer/Configure
Serviceguard clusters can be configured and managed using Serviceguard Manager
or using Serviceguard commands, including:
cmviewcl
View information about a high availability cluster
cmrunnode
Run a node in a high availability cluster
cmhaltnode
Halt a node in a high availability cluster
cmruncl
Run a high availability cluster
cmhaltcl
Halt a high availability cluster
How to Obtain
Serviceguard is included with the Mission Critical Operating Environment and with
various specialized mission-critical and virtualization bundles. Consult your HP Sales
Representative or an HP authorized reseller for more information.
For Further Information
The following Serviceguard document contains detailed information on configuring
Serviceguard clusters:
• Managing Serviceguard, Thirteenth Edition, B3936-90105
Other Cluster Types
Serviceguard clusters can be located in a single room or single building; additionally,
they can participate in clusters spread over vast distances. The distance between nodes
largely determines which form of clustering you are using.
More information about the following cluster types is available in the document
Designing Disaster Tolerant High Availability Clusters (HP Part Number: B7660-90013),
available on docs.hp.com.
Extended Distance Clusters
An extended distance cluster contains alternate nodes located in different data centers
separated by some distance. Extended distance clusters are connected using a high
speed cable that guarantees network access between the nodes as long as all guidelines
36 HP-UX Virtualization Technologies