RLS parameter

Parameter type

Keyword, optional

Purpose

You can, on a system that includes MVS/DFSMS Version 1 Release 3 or higher, use the RLS parameter to specify the level of record sharing, or sharing protocol, for a VSAM data set containing records that must be shared. See z/OS DFSMS Using Data Sets for a description of the sharing protocols and to determine whether your application can run in a shared data environment without modification.

Note: RLS is most useful for an existing application. For a new or heavily-modified application, you can request record-level sharing in application code and do not need to specify RLS on the DD statement.
Parent topic: DD statement