Controlling the use of resource verification reduction

The use of resource verification reduction is controlled by the VFYRED and VFYREDTI start options.

Use of the VFYRED start option determines whether resource verification reduction is allowed for all LU 6.2 session initiation requests using the APPCCMD application programming interface.
Use of the VFYREDTI start option indicates the maximum amount of time that cache information may be used before a resource location must be verified.

Resource verification reduction is suppressed for application programs with a LOGON exit unless the application program indicates support of multiple logon exit through the application capabilities control vector. Table 1 shows when the resource verification reduction function is allowed and requested by the requesting application.

Table 1. Resource verification reduction matrix
VFYRED start option value	LOGON exit included	Multiple logon indicator set on	Verification reduction allowed
YES	YES	YES	YES
YES	YES	NO	NO
YES	NO	N/A	YES
NO	N/A	N/A	NO