Using LNKLSTxx

If you use LNKLSTxx instead of PROGxx, during IPL, the system opens and concatenates each data set in the order it was listed, starting with the first-specified LNKLSTxx member. The system creates a data extent block (DEB) that describes the data sets concatenated to SYS1.LINKLIB and their extents. The extents remain in effect for the duration of the IPL.

After this processing completes, library lookaside (LLA) is started. LLA manages the LNKLST data sets and can be used to control updates to them. For more information about SYS1.LINKLIB and other data set concatenations, see:
Parent topic: LNKLSTxx (LNKLST concatenation)