Starting DBCTL, DLISAS, and DBRC

You use the procedure library member DBC that is supplied with DBCTL to start the DBCTL subsystem.

About this task

The procedure is generated during IMS system definition and must be modified to fit your system's needs.

Also generated during system definition are procedures for DBRC and DLISAS, which are used to generate the DBRC and DLISAS address spaces. The DBRC and DLISAS procedures are started automatically by DBCTL during DBCTL startup.

The region types specified for each one are:

PARM='DBC'

for DBCTL PARM='DRC' for DBRC PARM='DLS' for DLISAS

All three procedures use positional parameters on the EXEC statement:

PARM='region type,parm1,parm2,parm3,...'

Many of the positional parameter defaults are specified during system generation, but you can override them with parameters you specify at execution time.

When all three address spaces have been started successfully, DBCTL issues the following message indicating it is ready to accept an appropriate restart command:

DFS989I IMS (DBCTL) READY (CRC=x) xxxx

where x is the command recognition character (CRC), as explained in Operator communication with DBCTL: overview, and xxxx is the DBCTL sysid, as specified in the IMSID= parameter of the DBCTL startup JCL.

See System definition in IMS product documentation for guidance on DBCTL procedures, including JCL and descriptions of parameters.