CA Dynam for VSE User Guide

Tape File Management Utilities
Note: The ASSGN FILENAME,SYSNNN,OUTPUT function:
• Should be avoided in a multiple-CPU environment sharing tape drives
because it causes cross-AVR
• Results in a CADT010D message unless the DYNAM/T option record
includes REUSE(YES) support
SORTIN Files
The case of Filename SORTINx is special. TDYNASN finds the specified data set
for the first SORTINx ASSGN encountered. Then, an ASSGN for SORTIN2-9 is
equated to the first SORTIN assignment. Any time SORTIN1 is encountered, it
is assigned to the tape drive on which the specified data set is found. UPSI 1
overrides this and causes actual assignments to be made for each SORTIN file.
The following options provide a variety of methods for handling SORTIN files:
Option One
Using dummy ASSGNs to permit AVR when SORT needs each input file.
Examples of this option are shown under Format One of "Using The ASSGN
Statement."
Option Two
Using one tape drive for all SORTIN files, locating the drive with AVR. For
example, in this case, an ASSGN is made to the same tape drive for each
SORTIN file.
// TLBL SORTIN1,'DSN A',,,,,,8
// TLBL SORTIN2,'DSN B',,,,,,8
// TLBL SORTIN3,'DSN C',,,,,,8
// TLBL SORTOUT,'DSN D'
// EXEC TDYNASN
ASSGN SORTOUT,SYS001,OUTPUT
ASSGN SORTIN1,SYS002,INPUT
ASSGN SORTIN2,SYS003,INPUT
ASSGN SORTIN3,SYS004,INPUT
/*
Option Three
Alternating SORTIN files between two tape drives, locating the first two input
files with AVR, as shown in the example below.
The sequence of the ASSGN statements is critical; without UPSI 1, SORTIN2-9
is equated to the first SORTIN encountered. An ASSGN for SORTIN1 is always
made to the tape drive on which the correct data set is found. Any ASSGNs
following SORTIN1 are equated to the same device unless UPSI 1 overrides
them.
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