Hardware requirements

IBM Z Workload Scheduler operates on any IBM® hardware configuration supported by z/OS. For the minimum version supported, see the Program Directory.

IBM Z Workload Scheduler needs a minimum region of 8 MB below the 16 MB line; at least 32 MB must be available above the 16 MB line. The region value depends strictly on the IBM Z Workload Scheduler customization and workload. For IBM Z Workload Scheduler to work correctly, you might need to specify a region value of 64 MB, which gives you all the available space below the 16 MB line plus 64 MB above the 16 MB line.

In particular, a region value of 64 MB is strongly recommended when the IBM Z Workload Scheduler TCP/IP or APPC server is used for remote interfaces, such as the Dynamic Workload Console, PIF, and ISPF.

Consider to increase the region size specification if the server task will normally run for a long time (several weeks or months). Also make sure that the IEFUSI exit is not limiting the region size to a value less than the one coded in the JCL.

An IBM Z Workload Scheduler dialog user needs a region of 3 MB below the 16 MB line; if you want to run EQQAUDIT interactively (option 9.10 of the main menu), this number then increases to 4 MB. IBM Z Workload Scheduler report programs need a region of 3 MB below the 16 MB line.

IBM Z Workload Scheduler uses less than 1 KB of 24-bit Common Service Area (CSA) storage. The amount of 31-bit Extended Common Service Area (ECSA) used is approximately 30 KB, plus 2 KB per active dialog user.