CA Dynam for VSE User Guide

Extending ISAM Files
Extending ISAM Files
If it is necessary to extend an existing ISAM file defined in the Catalog, you
must specify the option code IE in the file's DLBL statement. This code
indicates to CA Dynam/D that the ISAM file is to be extended rather than
created. Again, no EXTENT statements are used. For example,
// DLBL FILEA,'ISAM FILE (IE)'
Note: IE should only be used with files defined in the Catalog.
Adding a File to the Catalog
You can catalog any file by specifying the option code C as part of the DLBL
file ID or by executing the DYNCAT utility program. For more information
about DYNCAT, see the chapter "Maintaining the Catalog—DYNCAT Program."
The DYNCAT program enables you to create an entry in the CA Dynam Catalog
which records a data file's characteristics and disk space requirements.
Alternatively, you can specify option code C on a DLBL statement, which
automatically creates (or recreates) a catalog entry when the file is closed.
The option code C takes effect only when the data file is being created. The
catalog entry created (at CLOSE) includes information such as the disk volume
the file was created on and the number of tracks allocated and used.
Examples
To catalog an SD file:
// JOB GENERATE SD WORK
// DLBL SDDOUT,'DISK.FILE (C,I)'
// EXTENT SYS001,POOL01,1,0,1,19
// EXEC PROGRAM
CADD002I ALLOCATED FILE=SDDOUT SYS001=202 SYSWK1 X=0/159/19
CADD022I RELEASED 18 TRACKS FILE=SDDOUT VOL=SYSWK1
Note that the character C enclosed within the parentheses indicates the file is
to be cataloged when the file is closed.
Chapter 4: Disk File Management 4–29