CA Dynam for VSE User Guide

Changing File Characteristics
Considerations for CA Dynam/FI Options
Record Format Changes
Changing a record format (RECFM=) from:
TRUNCS Support (DLBL)
• Fixed-length (F or FB) to variable-length (V or VB) or undefined records
(U) causes trailing blanks to be eliminated from each data record.
• Variable-length (V or VB) or undefined (U) records to fixed-length (F or
FB) records causes the following. If the variable-length record is:
−
−
greater than the LRECL specified, the record is truncated to the
specified length.
smaller than the LRECL specified, the record is padded with blanks.
DASD files processed by CA Dynam/FI use logic modules with TRUNCS=YES
support. If a file is created under CA Dynam/FI control for audit purposes only
(that is, no file characteristics are changed), be sure to process that file as
input with CA Dynam/FI or a logic module that includes TRUNCS support.
When you do not want short blocks written, use FIOPT=(NOTRUNC).
VSAM Support (DLBL) To change to VSAM DLBL files, CA Dynam/FI uses:
• Entry-sequence/key-sequence on input
• Entry-sequence on output
• Address processing of files.
Physical locations of logical records in a key-sequenced VSAM file change as
other records are added/deleted. Address processing of such files will present
problems. Thus, users should reorganize their key-sequenced input files before
they request CA Dynam/FI to change them to VSAM files.
Commas Separating Operands
When DLBL and TLBL statements are logged by Job Control (either to SYSLOG
or SYSLST), the commas separating the CA Dynam/FI operands from the
remainder of the statement are replaced by blanks.
Example
Statement containing commas:
// TLBL INPUT,'TAPE FILE',,FIOPT=(SL),BLKSZ=1200
Will appear with blanks, as follows:
// TLBL INPUT,'TAPE FILE' FIOPT=(SL),BLKSZ=1200
Chapter 6: Controlling File Independence 6–21