This sharing protocol provides not only more granular locking through the use of a CF lock structure but also greater buffering and caching through the use of the SMSVSAM address space and its associated buffer pools. A catalog in RLS mode completely eliminates the use of the SYSIGGV2 BCS reserve/enqueue, ISC, VLF, and ECS for that catalog, and the responsibility of locking, buffering, and caching falls onto the SMSVSAM address space.

For additional information on enabling this protocol, see Accessing Catalogs for Record Level Sharing (RLS).