Requirements for Non-Cluster Aware Applications

An ordinary, noncluster aware application must meet particular requirements to be a candidate for high availability (HA). The section Analyzing the Application for Suitability lists these requirements. This appendix provides additional details about particular items in that list.

An application is made highly available by configuring its resources into resource groups. The application's data is placed on a highly available cluster file system, making the data accessible by a surviving server in the event that one server fails. See information about cluster file systems in the Oracle Solaris Cluster Concepts Guide.

For network access by clients on the network, a logical network IP address is configured in logical host name resources that are contained in the same resource group as the data service resource. The data service resource and the network address resources fail over together, causing network clients of the data service to access the data service resource on its new host.

This appendix covers the following topics:

• Multihosted Data

• Host Names

• Multihomed Hosts

• Binding to INADDR_ANY as Opposed to Binding to Specific IP Addresses

• Client Retry