CA Dynam for VSE User Guide

Allocating Space across Generic Volumes
For example, if you enter serial number SYSWK*, CA Dynam/D searches for a
volume serial beginning with SYSWK. Once such a disk is found, CA Dynam/D
checks if there is enough available space. If not, the next occurrence of that
VOLID beginning with these characters is located. The process continues until
sufficient space is found to meet the allocation requirements for the specified
volume serial number.
Each of the other generic volume serial numbers shown in the table will cause
CA Dynam/D to follow the same method of searching the disks and verifying
their space. The only difference is the scope of the disk search; the more
asterisks you include in the generic VOLSER, the broader the search.
Finally, the serial number ****** causes CA Dynam/D to allocate the file on
any disk, searching each disk volume in PUB or COMAVR order.
Automatic Secondary Allocation
For files controlled using automatic secondary allocation, cross-volume
allocation will only be effective for the first allocation using a particular label
record. Subsequent opens will use the physical volume serial number on which
the file was placed the first time.
Disk Pool Management
The generic serial numbers can be used as pack POOLIDs in conjunction with
Disk Pool Management.
Catalog Management
Cross-volume allocation can be implemented using the Catalog Management
facility. For more information, see DYNCAT in the chapter "Maintaining the
Catalog—DYNCAT Program."
Sample JCL:
// JOB DYNAM CROSS VOLUME ALLOCATION
// DLBL SDDINP,'DISK.FILE (D,I)',1,SD
// EXTENT SYS008,SYS***,1,0,1,38
// EXEC PROGRAM
CADD002I ALLOCATED FILE=SDDINP SYS008=205 SYSWK1 X=0/153/38
CADD003I AUTO-DELETE VOL=SYSWK1 FILE=SDDINP FILE-ID='DISK.FILE'
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