Job Management Partner 1/Performance Management User's Guide

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9.1.3 Designing the network configuration

When Performance Management is used on a logical host, it is necessary to configure a network so that communication is possible by using logical host names and logical IP addresses.

A logical host is a logical node that is controlled by cluster software and a unit of failover. A logical host has a logical host name and a logical IP address. Applications store data on shared disks and communicate via logical IP addresses, so that they are not dependant on physical nodes and can perform failover.

A physical host is a physical node. The host name used by a physical host (the host name displayed when the hostname command is executed) is called the physical host name, and the IP address compatible with a physical host name is called the physical IP address.

The following figure shows an overview of physical and logical hosts.

Figure 9-8 Overview of physical and logical hosts

[Figure]

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