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VSAM Record Level Sharing (RLS) Overview



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 regions. With RLS, CICS regions that share VSAM data sets can reside in one or more MVS images within an MVS parallel sysplex.


The presentation covers:

  • RLS z/OS Release enhancements
  • IBM Products Exploiting VSAM RLS
  • Record Level Sharing - Design direction
  • Review of base VSAM
  • Review of RLS
  • RLS or TVS Configuration Changes
  • SMSVSAM Initialization
  • SMSVSAM Commands
  • RLS CICS Environment
  • Transactional VSAM (TVS)
  • Multiple Lock Structure (future enhancement)
  • Recommended APARs
  • Summary
Although this presentation was written in 2007, most of the information still applies to later releases of the mentioned products.

RLS Overview.pdf

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Product Synonym

CICS/TS CICS TS CICS Transaction Server

Document Information

Modified date:
17 June 2018