CSDRLS
The CSDRLS system initialization parameter specifies whether CICS is to access the CSD in RLS mode.
- CSDRLS={NO|YES}
- Valid values are as follows:
- NO
- The CSD is opened in non-RLS mode, as specified on the CSDLSRNO parameter.
- YES
- The CSD is opened in RLS mode. This enables you to update the CSD concurrently from several CICS regions, provided all the regions specify CSDRLS=YES. If a CICS region opens the CSD in RLS mode, another CICS region cannot open it in non-RLS mode. The first CICS region to open the CSD in a sysplex with SMSVSAM determines the access mode for all regions.
Your CSD must be defined to support RLS access: the IMBED option must not be specified, and recovery attributes must be defined in the VSAM catalog. Definitions required for VSAM RLS support explains the data set characteristics required to support RLS access. If your CSD does not meet these requirements, it will fail to open.
If you specify both RLS and local shared resource (CSDLSRNO=number), RLS takes precedence.
If you specify
CSDRLS=YES, the CSDRECOV, CSDFRLOG, and CSDJID parameters are ignored. You must specify the recovery attributes for an RLS-mode CSD in the ICF catalog entry for the CSD.Note: If you define a recoverable CSD for RLS-mode access, you have to quiesce all RLS activity against the CSD before you can update the CSD using the batch utility program, DFHCSDUP. You can use the SET DSNAME QUIESCE command to do this, to ensure that no CEDA, CEDB, or CEDC transactions can run until you unquiesce the data set on completion of the batch job.