NonStop Systems Introduction

The Application Server Environment
NonStop Systems Introduction—527825-001
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Choosing an Application Server Environment
WebLogic Server Applications Are Easy to Manage
WebLogic Server provides a powerful Web-based Administration Console that
provides system administrators with the tools they need to manage their applications.
The Administration Service, an implementation of the Java Management Extension
standard, provides facilities for managing WebLogic Server resources. Through the
Administration Console, administrators can configure attributes, deploy applications or
components, monitor resource usage (such as server load and memory usage), shut
down servers, or perform other management actions.
WebLogic Server Applications are Easy to Expand
New instances of WebLogic Server can be dynamically added to a cluster to increase
capacity as your business needs dictate. On NonStop servers, new processors and
nodes can be added easily, with single operating system and database images.
WebLogic Server Applications are Highly Available
WebLogic Servers can work together as a cluster to provide a powerful and reliable
application platform. While a clustered application appears to its clients as a single
server, it is actually a group of servers acting as one. Clusters provide both scalability
and availability. And this scalability and availability is delivered in a way that is
completely transparent to application developers. On NonStop servers, the WebLogic
Server clustering is augmented by the advantages of the NonStop architecture.
A cluster uses the redundancy of multiple servers to protect clients from system
failures. The same service can be provided on multiple servers in the cluster, so that if
one server fails, another can take over the workload of the failed server. The ability to
fail over from a failed server to a functioning server increases the availability of the
application to its clients.
WebLogic Server Applications are Secure
WebLogic Server provides a comprehensive security architecture, encompassing
access control, cryptography-based privacy, and user authentication. A built-in
lightweight Directory Access Protocol-based security data store is included to store and
process all the necessary security credentials and other information maintained by the
system administrator. A convenient and intuitive user administration interface is
provided to allow multilevel security policy configuration based on a large number of
access criteria or user-created set of conditions or rules.
Choosing an Application Server Environment
The choice of which application integration framework to use depends on the specific
integration requirements and the preferences of the corporation (for example, their
programming skills and the API used by their installed base). Application adapters can
be used to connect the various business applications to a framework of a different
base, but the greatest benefit of a framework is provided to applications written using