Technical Insights into File Access and Optimization in CICS

Authors: Chandra mouli Yalamanchili

DOI: https://doi.org/10.37082/IJIRMPS.v10.i4.232459

Short DOI: https://doi.org/g9hm9c

Country: USA

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Abstract: IBM's z/OS and CICS platforms are widely recognized for their unmatched efficiency in high-volume transactional file I/O, enabled by decades of architectural refinement and deep integration with z/OS storage services. This paper explores how file access operations are managed within the IBM CICS Transaction Server on z/OS. Focusing on VSAM dataset handling, it examines foundational topics such as local and remote file access, File Control Tables (FCTs) role, and EXEC CICS macros. Advanced optimization techniques like Local Shared Resource (LSR) pools, data tables, and Record-Level Sharing (RLS) architecture are also discussed.
The paper highlights real-world best practices for error-handling techniques, performance tuning, and system design considerations. Practical code examples complement the discussion, making this paper valuable for developers and system programmers working in CICS environments.

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Paper Id: 232459

Published On: 2022-08-11

Published In: Volume 10, Issue 4, July-August 2022

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