Shared user access from the same CICS region
Several users in a CICS region can access the CSD at the same time.
If you have specified read/write access for the CSD, all the CEDA users in a CICS region can perform read and write functions. CICS file control manages concurrent access for multiple users within a region, using the attributes specified in the CSDACC system initialization parameter.
For more information, see Multiple users of the CSD within a CICS region (non-RLS).