Enabling Batch Backout Logging

Batch Backout logging for a batch IMS program is enabled in JCL by the presence of the BBOLOG DD statement. For example:

//BBOLOG  DD DSN=HLQ.PRJ01.BBOLOG.DEMO001T,DISP=(NEW,CATLG,DELETE)

IEFRDER and IEFRDER2 DD statements are ignored to avoid confusion with mainframe IMS logging and log record formats.

When enabled, updates to all IMS databases, along with checkpoint calls issued by the application program, are written to the BBOLOG dataset. Backup log files are extended as required in the event that they exceed size restrictions.

Standard JCL DSN management can be used for tracking these log datasets in the Enterprise Server catalog.

CAUTION:

When logging is enabled, the primary log file and any extensions must not exist. If the job detects that the primary or extended log file already exists, then the job terminates with an appropriate error message.

Below is sample batch JCL that specifies a BBOLOG dataset:

//IMSBATCH JOB 'MICRO FOCUS',CLASS=A,MSGCLASS=A
//* DLI PROGRAM EXECUTION
//*
//S01       EXEC PGM=DFSRRC00,REGION=4M,
//          PARM='BMP,DEMO001B,DEMO001T,,,,,,,,,CDLI,,N,N'
//REPORT1   DD  SYSOUT=*
//BTSLST    DD  SYSOUT=*
//IMSERR    DD  SYSOUT=*
//IEFRDER   DD  DUMMY
//BBOLOG    DD  DSN=HLQ.PRJ01.BBOLOG.DEMO001T,DISP=(NEW,CATLG,DELETE)
//PRINTDD   DD  SYSOUT=*
//SYSOUT    DD  SYSOUT=*
//SYSPRINT  DD  SYSOUT=*
//