CA Dynam for VSE User Guide

Defining File ID Option Codes
O
Old file
Enables the user to access existing SD files and open the file without
reallocating the file. The O option causes CA Dynam/D to search for the
specified file in the VTOC and use the existing EXTENT information. This option
is not a default option and cannot be used with files controlled using automatic
secondary allocation.
P
Prohibit dynamic LUB allocation
The P option prohibits the use of dynamic LUB allocation for a file. The default
is to allow dynamic LUB allocation with the following exceptions:
• System work file (files beginning IJSYS)
• System logical units (for example, SYSRDR, SYSIPT, SYSLST, and so on)
• DA (direct access) files having more than one extent
The files described above are always prohibited from dynamic LUB allocation.
S
Same space for SORTIN and SORTOUT
This option is useful for conserving space during SORT or MERGE runs. When a
SORTOUT file is opened, it is assigned the same area defined for the SORTIN1
file. In this way, the SORT input and output files occupy the same area.
Note that S is not the default.
The S code should be specified on the DLBL statement for SORTOUT, and the
file IDs specified on the DLBL for SORTIN1 and SORTOUT must be identical.
Note that option code S causes CA Dynam/D to search for the specified file in
the VTOC. If the file cannot be found, an error message will be issued and the
job will cancel.
The S code applies only to CA Dynam/D-controlled files (relative starting track
equal to trigger value).
Note: Option S will be ignored when using CA SORT, the CA Sort/Merge
software product. CA SORT does not open its SORTOUT file until the SORTIN
files have been closed.
S:nnn
SYS number override
The S:nnn option is used to override the logical unit defined in the program's
DTF, in the Catalog, or both. It is rarely used because CA Dynam/D allocates
an available SYS number at OPEN time.
4–18 User Guide