Improving performance

For performance reasons, you might want to change the way VTAM® routes session requests. You can use either or both of the following to improve SSCP search performance:

Use the adjacent SSCP selection function of the session management exit routine to shorten or reorder the list of adjacent SSCPs to which an LU-LU session request is directed. The list is composed of the adjacent SSCPs that are coded in the ADJSSCP table for a specific network or a default list and the list of adjacent SSCPs that was built during the previous LU-LU session setup requests. This exit routine can also be used in conjunction with the dynamic adjacent SSCP facility to avoid having to define any ADJSSCP table while maintaining control of session routing requests.
Code the SSCPDYN and SSCPORD start options. SSCPORD can be specified as a start option, coded on individual ADJSSCP table definitions, or both. If SSCPORD is not coded for a given ADJSSCP table, the current value of the SSCPORD start option value is used each time that ADJSSCP table is selected for use.

If the CDRM name is coded for the destination CDRSC, that entry is still tried first.

Note: When a resource name that is not valid is entered in a logon request, the request is not rejected until the initiate request has been sent to every SSCP in the default SSCP list and every SSCP has rejected it. The search reduction function can be used to minimize the above.