CA Dynam for VSE User Guide

Unit Record Simulation
CICS Macro Level Preprocessor Support
CA Dynam/FI fully supports the CICS macro level preprocessor, despite the
inconsistent way in which the preprocessor performs I/O. BLKSZ=OPT support
provides major performance improvement and improved I/O utilization.
Sample JCL for COBOL:
// DLBL DFHPR30,'SYSPCH.FILE',2,SD,BLKSZ=OPT,SYS008
// EXTENT SYS008,SCRTCH,1,0,256,10
// ASSGN SYS008,DISK,VOL=SCRTCH,SHR
// EXEC DFHPRPR
.
.
COBOL PROGRAM
/*
// DLBL FISYSIN,'SYSPCH.FILE',2,SD,BLKSZ=OPT,SYS008,LRECL=80
// EXTENT SYS008,SCRTCH,1,0,256,10
// ASSGN SYS008,DISK,VOL=SCRTCH,SHR
// DLBL FISYSPH,'SYSPCH.FILE.2',2,SD,BLKSZ=OPT,SYS008
// EXTENT SYS008,SCRTCH,1,0,256,10
// ASSGN SYS008,DISK,VOL=SCRTCH,SHR
// EXEC ASSEMBLY
/*
// DLBL FISYSIN,'SYSPCH.FILE.2',2,SD,BLKSZ=OPT,SYS008
// EXTENT SYS008,SCRTCH,1,0,256,10
// ASSGN SYS008,DISK,VOL=SCRTCH,SHR
// EXEC FCOBOL
/*
Note: IBM requires a second DFHPRPR step with a UPSI of 10001000 to copy
the file and strip the first character. However, this step must be removed when
using CA Dynam/FI.
Derived file name
FISYSIN
FISYSPH
FISYSLS
FISYSnn
For supported logical unit
SYSIPT DTFs
SYSPCH DTFs
SYSLST DTFs
SYS0nn DTFs (COBOL unit record DTFs are this type.)
SYSRDR files are not supported because VSE Job Control does not use LIOCS
to process its SYSRDR files. (Note that RPG II uses SYSRDR to process card
files.)
Chapter 6: Controlling File Independence 6–7