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legacy application

Show me everything on IBM System z and mainframe systems

- In information technology, legacy applications and data are those that have been inherited from languages, platforms, and techniques earlier than current technology. Most enterprises who use computers have legacy applications and databases that serve critical business needs. Typically, the challenge is to keep the legacy application running while converting it to newer, more efficient code that makes use of new technology and programmer skills. In the past, much programming has been written for specific manufacturers' operating systems. Currently, many companies are migrating their legacy applications to new programming languages and operating systems that follow open or standard programming interfaces. Theoretically, this will make it easier in the future to update applications without having to rewrite them entirely and will allow a company to use its applications on any manufacturer's operating system.

In addition to moving to new languages, enterprises are redistributing the locations of applications and data. In general, legacy applications have to continue to run on the platforms they were developed for. Typically, new development environments account for the need to continue to support legacy applications and data. With many new tools, legacy databases can be accessed by newer programs.

Learn more about IBM System z and mainframe systems

Mainframe Management: The modern mainframe: This isn't your gramps' Big Iron. Mainframe management has evolved dramatically over the past few years.
Roadmap to mainframe application modernization: This tip outlines a modernization path for business-critical applications in an existing mainframe environment.
Top five mainframe tips: Data center pros are asking questions about the expanding role mainframes play in the business.
Mainframe Management: The modern mainframe: This isn't your gramps' Big Iron. Mainframe management has evolved dramatically over the past few years.
Using CICS dump tables to manage problems in online systems: The CICS dump table feature can be useful for diagnosing and managing problems in online systems when the information you need isn't available through default channels.
High mainframe software costs may lead to platform's demise: Are mainframe software costs too high or does software productivity and reduced labor costs lead to lower mainframe total cost of ownership (TCO)?
Manage CICS workloads with transaction classes: Using transaction classes is a great way to manage CICS workloads that come in unpredictable increments. Learn how to use transaction classes and get examples in this tip.
Run CICS in batch to beat a shrinking batch window: As batch windows are getting shorter, it becomes harder to run traditional VSAM-based CICS systems. Try running CICS in batch as a low-cost solution.

LAST UPDATED:

16 Sep 2005

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