IBM Support

VSAM Record Level Sharing (RLS) Overview

Education


Abstract

This presentation contains an overview of VSAM record level sharing (RLS). RLS is an access mode for VSAM data sets. RLS enables VSAM data to be shared, with full update capability, between many applications running in many CICS Transaction Server for z/OS (CICS TS) regions. With RLS, CICS regions that share VSAM data sets can reside in one or more MVS images within an MVS parallel sysplex.

Content

The presentation covers:
  • Overview of RLS z/OS Release enhancements.
  • IBM Products Exploiting RLS.
  • Record Level Sharing - Design direction.
  • Review of VSAM vs RLS:
    • Share Options
    • Buffering
    • Locking
    • RAS
    • Performance Measurements
  • RLS/TVS Configuration Changes
    • Parmlib Changes
    • SYSPLEX with SMSVSAM
  • SMSVSAM Initialization
  • SMSVSAM Commands
  • RLS/CICS Environment
    • CICS and base VSAM FOR configuration
    • CICS and RLS configuration
    • RLS/CICS data recovery
    • RLS/CICS automation enhancements
  • Transactional VSAM (TVS)
    • Hardware/Software Requirements
    • Application Requirements

[{"Type":"MASTER","Line of Business":{"code":"LOB70","label":"Z TPS"},"Business Unit":{"code":"BU048","label":"IBM Software"},"Product":{"code":"SSGMGV","label":"CICS Transaction Server"},"ARM Category":[{"code":"a8m0z000000cwgsAAA","label":"Data services and Data tables-\u003EVSAM files"}],"ARM Case Number":"","Platform":[{"code":"PF035","label":"z\/OS"}],"Version":"and future releases;5.4.0;5.5.0;5.6.0;6.1.0;6.2.0"}]

Product Synonym

CICS/TS CICS TS CICS Transaction Server

Document Information

Modified date:
12 June 2025

UID

swg27010925

Page Feedback