Why is the CA 7 Datacom 770 datasets displaying 33 extents allocated?


Article ID: 221159


Updated On:


CA Workload Automation CA 7 Edition


Why are the CA 7 Datacom 770 datasets displaying for space of 33 extents allocated?


Release : 12.1

Component :


When allocating multi volumes for the CA 7 Datacom datasets in hlq.CAL2JCL(AL2DCA30), the additional extents are allocated during the DBUTILITY INIT function.  

For example, for a DD statement with VOL=SER=(VOL1,VOL2,VOL3) and the VOLUMES keyword is not used in the DBUTLTY:

the INIT function will initialize 1 to 16 extents in VOL1 space availability, 1 to 16 extents in VOL2 space availability and 1 more extent in VOL3.  The unused extents will be used for dynamic extend.

Example:  VOL=SER=(VOL1,VOL2,VOL3)  with SPACE=(CYLS,(100,50))

VOL1         (100x1pri extent)+(50x15 sec extent)    =       850 cyls           =       16 extents          

VOL2         50x16 sec extent                                   =       800 cyls           =       16 extents

VOL3         50x1 sec extent                                     =        50  cyls           =       1   extents


TOTAL                                                                     =     1700 cyls           =       33 extents




Additional Information


VOLUMES=4multivolumeINITs (15.0)

If the keyword VOLUMES= is specified with a number value that is less than the number of volumes provided, the INIT function only initializes the number specified in the VOLUMES= keyword. For example, for a DD statement with VOL=SER=(VOL001,VOL002,VOL003), without the VOLUMES= keyword DBUTLTY initializes 1 to 16 extents on VOL001, 1 to 16 extents on VOL002, and 1 (or more) extents on VOL003. But with the VOLUMES= keyword set as VOLUMES=2, DBUTLTY initializes 1 to 16 extents on VOL001 and one (or more) extents on VOL002. Unused extent possibilities on VOL002 and VOL003 are available for dynamic extend.