The database range table

The range table (ICHRRNG) is a load module. This table determines in which data set of the RACF® database RACF places each profile. This table must reside in a link-pack area (LPA) library or in a modifiable link-pack area (MLPA) library, such as SYS1.LPALIB. It must be linked with RMODE=24.

All systems sharing a database must use the same database range table. One way to ensure that each system uses the same table is to put the table in a common link library.

If RACF is enabled for sysplex communication, it verifies at IPL that a local system's range table matches the range table used by the rest of the data sharing group. If there is a mismatch, it uses the table used by the group.

RACF provides a default range table with the following values:

F'1': Number of range values
XL44'00': Range start value
AL1(1): Data set number

This table assumes the RACF database has one data set containing all profiles. If you wish to split your database, you must replace the RACF load module with your own. Do this by creating a source file, assembling the file, and link-editing it. You should use an SMP/E USERMOD to do the assembly and link-edit.