Striping of FCTC device numbers

Striping of FCTC device numbers was configured as an alternative to typical approach of configuring sequential ranges of FCTC device numbers with identical connection properties.

For more information see IOCDS configuration for FICON CTCs.

The rationale behind configuring FCTC device numbers in a striped manner was:

• Exploring the influence of the FCTC device numbers on the distribution of the I/O load on configured FCTC devices and FICON channels, and
• Exploring whether a more granular control could be executed with respect to the selection of FCTC devices that z/VM® dedicates for unidirectional use (see Avoidance of write collisions).