Enlarging the Trace File

At times, it may be necessary to increase the size of the Control‑M/Tape Trace file. This situation arises if the Trace file often reaches maximum capacity, or if an increase in tape activity at your site is imminent.

To enlarge the Trace file, perform the following steps:

1. Shut down Control‑M/Tape using the operator command S CTTINIT,PARM='MODE=TERM'.
2. Back up the active Trace file using the Control‑M/Tape CTTACP utility, the IBM IEBGENER utility, or any similar tool.
3. Rename the production Trace file. For example, rename the CTT.V900.TRC file to CTT.V900.TRC.OLD.
4. Using ICE, select Customization. Enter CTT in the Product field, and select Product Customization.
5. Select major step 2, "Customize Control-M/Tape Datasets," and then minor step 3, "Trace File Space Calculation."
6. Calculate the space needed for the new Trace File and update the definitions on the screen. To calculate the space needed, see the planning and space calculation step and the trace file calculation topic in the Control‑M/Tape installation chapter of the INCONTROL for z/OS Installation Guide.

   Note: The Trace file can be enlarged either by increasing the number of blocks, by enlarging the block size, or both.

7. Select minor step 4, "Save parameters into Product Libraries."
8. Select minor step 7, "Create and Init Trace File," and submit the job. This job allocates and formats a new Control-M/Tape Trace file.
9. Copy the old Trace file to the new and larger Trace file using the CTTACP utility. Following is an example of CTTACP activation:

   Figure 79 CTTACP Activation Example

   //name JOB ,IOA,CLASS=A,MSGCLASS=X

   //*

   //*  COPY ONE Control‑M/TAPE TRC DATASET TO ANOTHER TRC

   //*

   //TT2ACP EXEC CTTACP,

   //       TRCIN='CTT.V900.TRC.OLD',

   //       TRCOUT='CTT.V900.TRC'

   //SYSIN  DD *

     COPY FROM=TRACE,TO=TRACE

   //

10. Restart Control‑M/Tape using the operator command S CTTINIT,PARM='MODE=INIT'.