General Information › Basic Conventions and Requirements › Data Set Allocation

Data Set Allocation

All CA Disk function allocations use SVC 99 for dynamic allocation of non-VSAM data sets. Using SVC 99 allows allocation control products such as CA Allocate or IBM DFSMS to redirect allocations.

CA Disk uses SVC26 to define the VSAM definitions. These definitions are candidates for redirection to other volumes by a pooling package.

Due to SVC 99 restrictions, CA Disk does not set the DFSMS ACS &ACSENVIR variable. To keep data set allocations consistent, ACS &ACSENVIR is not set for VSAM allocations.