Many enterprise applications must be accessible (available) to users 24 hours a day, 7 days a week. Netscape Application Server provides a highly available and reliable solution through the use of load balancing and dynamic failover (also called failure recovery).
NAS enables you to distribute all or part of an application across multiple servers. As a result, if one server goes down, the other servers can continue to handle requests.
NAS minimizes downtime by providing automatic application restarting. In addition, NAS maintains and replicates distributed user-session information and distributed application-state information. Information is maintained as long as more than one NAS installation is running in a cluster with the server that crashed.
Developers need not be concerned with building recovery and scalability features into their application. The application inherits these features simply by being hosted on the runtime environment.
For more information about failure recovery, see "Summary of Process Interactions".See also the Administration Guide or the Deployment Guide.
For more information about load balancing, see "Load Balancing System". See also the Administration Guide or the Deployment Guide.
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