WebSphere brand IBM WebSphere Telecom Web Services Server, Version 7.1

Evaluating your hardware environment

WebSphere® Telecom Web Services Server installs and runs as an application on WebSphere Application Server. It can be deployed on various hardware configurations.

Before starting the installation process, review the planning information to develop a deployment strategy that will meet your network needs.
Note: If you are running WebSphere Application Server version 6.1.0.29, the TWSS Access Gateway can coexist in the same cluster with the Service Platform components. However, when the Service Platform components are deployed in a cluster running WebSphere Application Server version 7.0.0.7, the Access Gateway must be deployed in a separate cluster.

WebSphere Application Server supports numerous deployment topologies. It is beyond the scope of this documentation to provide detailed steps for each topology. Therefore deployment information has been grouped into a number of broad categories. Throughout the documentation the categories are used to provide a reference point. Each component has a unique deployment strategy. Prior to deployment, review all of the planning and installation information.

Here is a list of the most commonly used topologies in a WebSphere Application Server environment:
Note: The single server topology can be used for development or the proof of concept. The Access Gateway, Service Policy Manager, Service Platform components, and Web service implementations can be installed on a single server. However, this is not recommended for a deployment.
Distributed topology
The components (for example, the Web server, application server, and databases) are physically separated onto different servers. This type of topology might be used to verify functionality in an early phase of a deployment.
If you use only one server for the Access Gateway or Service Platform components, it will limit failover redundancy.
Vertical scaling topology
Members of a cluster exist on the same physical machine. Some services perform better with a small or moderate size Java heap. This may not utilize all of the resources of a powerful machine, so a vertically scaled deployment allows the processor and memory to be more fully utilized, while each instance can run more efficiently in a smaller JVM heap.

Frequently, vertical scaling is combined with horizontal scaling to allow both the efficient use of resources and the benefits of physical redundancy.

Horizontal scaling topology
Members of a cluster exist on multiple physical machines, effectively and efficiently distributing the workload of a single instance. HTTP redirector products can also be used to implement horizontal scaling. Clustering is most effective in environments that use horizontal scaling because of the ability to build in redundancy and failover, to easily add new horizontal cluster members to increase capacity, and to improve scalability by adding heterogeneous systems into the cluster.

You can combine vertical and horizontal scaling techniques to increase efficiency in the environment.

Each Web service implementation can have its own cluster of service platform instances (WebSphere Application Server with service platform common components installed locally). While multiple service implementations can be deployed on a single service platform instance, this makes it easier to size the hardware and software configurations for each Web service implementation based on their performance capabilities.

The database is shared and clustered.

Development topology
The IBM® WebSphere Telecom Toolkit is intended for developing client applications that will remotely reference the services deployed in theWebSphere Telecom Web Services Server.

You can use WebSphere Integration Developer (WID) version 6.1.0.102 to customize the Access Gateway mediation flows. The WID plug-ins are provided so that mediation primitives can be imported into the WID tooling palette for customization of the message processing flows.




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