CLT

The CLT system initialization parameter specifies the suffix for the command list table (CLT), if the system initialization table (SIT) is used by an alternative Extended Recovery Facility (XRF) system.

Stabilized feature: The Extended Recovery Facility (XRF) in CICS® is stabilized. Consider alternative technologies that provide more flexible high-availability solutions for modern workloads. These solutions include the z/OS® Automatic Restart Manager (ARM), CICS data sharing, VTAM® persistent sessions, and use of the cross-system coupling facility. See also Stabilization notices and discontinued functions.
If you are using XRF, you must have a CLT; it is used only by the alternate CICS system. The command list table is used by XRF and contains a list of z/OS system commands and messages to be issued to the operator during takeover. For details on XRF system initialization parameter, see XRF system initialization parameter.

Defining CLT

You can define the CLT system initialization parameter in the following ways:
  • In the PARM parameter of the EXEC PGM=DFHSIP statement.
  • In the SYSIN data set of the CICS startup job stream.
  • Through the system console.
  • In the DFHSIT macro.

Values for CLT

CLT=xx (alternate)
The name of the CLT table is DFHCLTxx and the name consists of six fixed characters followed by a two character suffix xx. A suffix consists of one or two characters. The acceptable characters are: A-Z 0-9 @. (Do not use NO or DY). For information about coding the macros for this table, see Command list table (CLT).