This section focuses on setting production environments and realistic test environments, including post-installation and customization tasks for administrators; setting up Web servers and application servers; and administering the application servering environment.
An application server is a Java™ Virtual Machine (JVM) that runs user applications. The application server collaborates with the Web server to return a dynamic, customized response to a client request. The client request can consist of servlets, JavaServer Pages (JSP) files, and enterprise beans, and their supporting classes.
Clusters are groups of servers that are managed together and participate in workload management. A cluster can contain nodes or individual application servers. A node is usually a physical computer system with a distinct host IP address that is running one or more application servers. Clusters can be grouped under the configuration of a cell, which logically associates many servers and clusters with different configurations and applications with one another depending on the discretion of the administrator and what makes sense in their organizational environments.
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When you configure WebSphere® Application Server resources or assign port numbers to other applications, you must avoid conflicts with other assigned ports. In addition, you must explicitly enable access to particular port numbers when you configure a firewall.
You can create and delete profiles, which are sets of files that define the runtime environment. At least one profile must exist to run the product.
You can monitor and control incorporated nodes and the resources on those nodes by using these tasks with the administrative console or other administrative tools.
This topic show how to manage application server configuration files.
An application server configuration provides settings that control how an application server provides services for running applications and their components.
You should use server clusters and cluster members to monitor and manage the workloads of application servers.