WebLogic Server Instances
Each WebLogic Server domain has a single server instance that serves as the Admin Server. The Admin Server maintains the domain's configuration information. If you're working in a development environment, you don't need any other server instances besides the Admin Server because you can deploy all applications on the Admin Server itself. Although you can do the same in a production environment (that is, use just one Admin Server and nothing else), Oracle strongly recommends that you use one or more Managed Servers, running on their own or as part of a cluster, to deploy your applications. Thus, the Admin Server is dedicated to performing configuration and administrative tasks only and not any deployment functions. You ...
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