The formula to estimate the number of 4K (4096-byte) blocks required for a RACF® database is

12 + A + B + BA + C

where:

12

Is the number of blocks that are required for the ICB and database templates

A

Is the number of blocks that are required for the profiles (see Calculating the number of blocks required for the profiles)

B

Is the number of index blocks that are required (see Calculating the number of index blocks required)

B_A

Is the number of blocks that are required for the alias index (zero if you are running application identity mapping in stage 0) (see Calculating the number of blocks required for the alias index)

C

Is the number of BAM blocks that are required (see Calculating the number of BAM blocks)