Integrated indexes must be defined in both the old and the new subschemas.
If you are copying areas containing SR8 (integrated index) records, you must allocate space for SECALX2 and SECIIX2.
If you are updating areas containing integrated index sets sorted by db-key, after the OPTALLOC step you must allocate space for three files (IIXEXOL, IIXEXTR, and IIXSRKY).
The amount of database space needed for SR8 records defined in the new subschema can be determined from the calculations in SECREAL and SECALX2.
