Follow these steps to fall back from VSAM RLS processing:
Use the access method services SHCDS LISTRECOVERY or LISTSUBSYSDS command to list all current recovery requirements known to SMSVSAM. Any recovery must be completed prior to continuing with fallback processing, or data integrity is compromised. SMSVSAM is not aware of certain subsystem-related recovery, such as indoubt resolution.
See z/OS DFSMS Access Method Services Commands for a complete description of the access method services SHCDS command.
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The SMS configuration should not include any cache sets defined in the base configuration. This ensures that the CF is only used for access to data sets which are already bound to a CF cache structure.
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VARY SMS,CFCACHE(CF_cache_structure_name),QUIESCE
where:
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Be sure to complete all the preceding steps before continuing with the procedure to permanently shut down SMSVSAM and delete all knowledge of the lock structure and sharing control.
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*ROUTE ALL V SMS,SMSVSAM,TERMINATESERVER
Reply C to
any outstanding IGW418D message. If FORCE SMSVSAM,ARM does not disable
the SMSVSAM server, use FORCE SMSVSAM.
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VARY SMS,SMSVSAM,FALLBACK
This
command issues message IGW523 to request confirmation. You should
first ensure that all SMSVSAM servers are disabled, then respond with:
FALLBACKSMSVSAMYES
Any other response cancels
the command.
Fallback is complete when message IGW524I is issued to the console that issued the FALLBACK command.
See Understanding the product environment for VSAM RLS for a list of rules and considerations to follow if you are also falling back to different CICS, CICSVR, or DFSMS releases.