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VTAM V4R4 for MVS/ESA Implementation Guide

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VTAM V4R4 for MVS/ESA Implementation Guide

ACF/VTAM V4R4 for OS/390 and MVS/ESA introduces major improvements in function, availability and performance. This redbook helps you to implement them by:
- describing and positioning each new feature
- pointing out pitfalls you may encounter
- giving practical examples showing how we made the features work.

We show how VTAM can improve reliability in an SNA network by its extensive support for High-Performance Routing (HPR). We demonstrate HPR across subarea connections, HPR across network borders, HPR on an interchange node and HPR used for CP-CP sessions.

We illustrate how VTAM's new multiprotocol DLC, High-Performance Data Transfer, can provide performance gains across high-speed connections such as channel links. We also detail the new adaptive pacing methods VTAM uses to improve performance still further. We show how VTAM systems can communicate using Asynchronous Transfer Mode (ATM), with the unique ability for the application program to specify the level of service required. ATM allows multimedia and other applications with very strict service level requirements to communicate efficiently across public and private networks.

We describe how an SNA session can survive a failure in the application, in VTAM, in MVS or even in the processor itself, using a combination of HPR and Parallel Sysplex. This function is called multinode persistent sessions.

We describe how VTAM systems in a Parallel Sysplex can establish communication with each other without requiring any dedicated channel connections or any definitions. We show how the topology database in a large, complex, volatile APPN network can now be managed to ensure that out-of-date information no longer circulates to the detriment of storage and processor resources on less powerful nodes.

This release of VTAM brings HPR to maturity, and we feel confident that many customers will now wish to migrate their VTAM-based networks to HPR. This redbook will provide invaluable assistance in that task.
Price: $34.00 $27.00
Pages: 162
Date Published: June 25, 1997
ISBN: 0738404713
Author: IBM Redbooks
Product Number: SG24-2100-00
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