5.1. Introducing VSAM RLS
In this section we introduce the basic concepts of VSAM RLS mode.
5.1.1. What is VSAM RLS?
VSAM RLS is another mode of managing buffer pools, which allows any number of users within your Parallel Sysplex to share your existing VSAM spheres. It provides full data integrity (read and write). The serialization is at record level. However to implement recoverable spheres the user must have its own backout log, as CICS has.
VSAM RLS does not introduce new types of VSAM clusters; rather, it introduces a new way of accessing existing data sets. Apart from the need to open data sets in RLS mode, the same VSAM record management interfaces (get, put, point, erase) are used.
You can specify the RLS mode in the MACRF parameter ...
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