Using the zIIP processor by the Control-D File Transfer Option

The ZIIPXBMA parameter is provided in the IOAPARM member for offloading Control-D File Transfer option (FTO) and Control-D Application Server I/O workloads to zIIP with XBM. The default is Y, that the I/O workloads are offloaded to zIIP with XBM.

The XBM modify command allows the FTO to activate the offloading of eligible I/O workloads from general purpose processors to zIIP processors with XBM. This way XBM address space can be started after INCONTROL address spaces, without requiring the INCONTROL address spaces to be restarted.

For the FTO, the XBM modify operator command syntax is as follows:

where nn is the decimal sequential ASID number of the FTO address space to which the modify command is submitted. The modify command is broadcast to all active FTO address spaces if the ASID number ‘=nn’ is omitted.