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Sun™ Cluster Environment: Sun Cluster 2.2 by David Deeths, Ph.D. Joseph Bianco, Enrigue Vargas

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Qualifying a Highly Available Application

Software development requires justification because it embraces time, people, and money. Before developing an HA-agent for an existing business application, the application should be qualified to ensure it complies with basic HA requirements. The following sections detail application functions that should be considered before a business application is made highly available using the SC2.2 API.

Client/Server Environment and Services

In a client/server environment, connectionless applications (i.e., Web services, NFS services, etc.) can easily be made highly available because there is no state associated with client transactions. Connection-oriented applications (i.e., telnet, FTP, etc.) require persistent ...

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