CA Dynam for VSE User Guide

Basic Components
Method Two
Submitting multiple EXTENT statements, all with a relative track equal to the
trigger value defined in the DYNAM/D option record for a file. For example:
// JOB MULTIPLE EXTENTS EXAMPLE
// DLBL SDDOUT,'DISK.FILE',,SD
// EXTENT SYS006,POOL01,1,0,1,1
// EXTENT SYS006,POOL01,1,1,1,1
// EXTENT SYS006,POOL01,1,2,1,1
// EXTENT SYS006,POOL01,1,3,1,1
// EXTENT SYS006,POOL01,1,4,1,15
// EXEC DYNGENR
CADD002I ALLOCATED FILE=SDDOUT SYS006=202 SYSWK1 X=0/7/1
CADD002I ALLOCATED FILE=SDDOUT SYS006=202 SYSWK1 X=1/8/1
CADD002I ALLOCATED FILE=SDDOUT SYS006=202 SYSWK1 X=2/9/1
CADD002I ALLOCATED FILE=SDDOUT SYS006=202 SYSWK1 X=3/10/1
CADD002I ALLOCATED FILE=SDDOUT SYS006=202 SYSWK1 X=4/57/15
Note that the secondary extents will only be used if the primary extent is
filled.
Method Three
First defining a file in the CA Dynam Catalog as eligible for secondary
allocation, and then supplying a DLBL statement with no EXTENT statements.
In the following example, DISK.FILE is defined to the Catalog with 10 tracks
for primary allocation, 5 tracks for each secondary allocation, and a maximum
of 3 secondary allocations.
// JOB DEFINE ALLOCATION
// EXEC DYNCAT
DEFINE 'DISK.FILE' ALLOC=(SYSWK1,TRK,10,5,3)
/*
/&
// JOB USE FILE
// DLBL SDDOUT,'DISK.FILE'
// EXEC PROGRAM
CADD002I ALLOCATED FILE=SDDOUT SYS006=202 SYSWK1 X=0/7/10
CADD002I ALLOCATED FILE=SDDOUT SYS006=202 SYSWK1 X=1/17/5
CADD002I ALLOCATED FILE=SDDOUT SYS006=202 SYSWK1 X=2/22/5
CADD002I ALLOCATED FILE=SDDOUT SYS006=202 SYSWK1 X=3/27/5
Catalog File
The Catalog File, shared by all CA Dynam software components, is used by CA
Dynam/D to gather and maintain vital information relating to disk files and the
space they occupy. It provides CA Dynam/D with the information needed to
allocate disk space for a file, to maintain the latest disk volume location, and
to maintain various usage statistics relating to a file.
4–6 User Guide