RACF database split/merge/extend utility program (IRRUT400)

IRRUT400 performs the following functions:

Copies a RACF® database to a larger or smaller database, provided there is enough space for the copy.
Redistributes data from RACF databases. For example, IRRUT400 can split a single data set in the RACF database into multiple data sets, merge multiple data sets in the RACF database (previously split) into fewer data sets, or rearrange RACF profiles across the same number of input and output RACF data sets. Though the utility allows a maximum of 255 input data sets and 255 output data sets, MVS™ allows RACF to have up to 90 data sets in the primary database and up to 90 corresponding data sets in the backup database.
Restriction: Do not use IRRUT400 to merge or rearrange data sets from different systems; the results of doing so are unpredictable.
Identifies inconsistencies, such as duplicate profiles appearing in different data sets.
Physically reorganizes the database by bringing all segments of a given profile together.
Copies a database to a different device type.

Attention:

If you are sharing a database between systems at different levels, only run IRRUT400 on the latest level system sharing the database. For example, if a z/OS® V1R7 system is sharing a database with a z/OS V1R8 system, only run IRRUT400 from the V1R8 system
Specify the real names of the data sets; do not specify aliases.

Guideline: Run IRRUT400 when your system has little RACF activity.

RACF sysplex communication: Whenever you need to run IRRUT400 against a database that is active on a system that is a member of the RACF data sharing group, always run the utility from a system in the group. Failure to do so can cause the utility to build an incorrect output database.