IBM CICS Scalability: New Features in V4.2

An IBM Redpaper publication

Published 20 September 2011

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IBM Form #: REDP-4787-00
(14 pages)

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Authors: John Tilling


CICS® Transaction Server is the IBM® general-purpose transaction processing software for z/OS®. It is a powerful application server that meets the transaction-processing needs of both large and small enterprises. It builds on z/OS and System z® facilities to provide high availability and scalability at a low cost per transaction, and it supports large transaction volumes with a fast and consistent response time.

CICS Transaction Server for z/OS handles billions of transactions a week. Companies around the world rely on their CICS systems in their daily operation. It is important that the CICS systems can scale to meet the demands of the customer's business. CICS Transaction Sever provides a scalable solution that scales horizontally by supporting the distribution and control of work between multiple CICS regions in a z/OS sysplex.

The newest release, CICS Transaction Server for z/OS Version 4.2, includes scalability enhancements that allow more work to be done quicker in a single CICS system. This enhancement allows increased vertical scaling and can decrease the need to scale horizontally, thus reducing the number of regions that are required to run the production business applications.

The scalability enhancements in CICS Transaction Server Version 4.2 fall into two broad areas: increased exploitation of Open Transaction Environment (OTE) and increased exploitation of 64-bit storage.

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