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· For a RANDOM structure
Allocate the prime and overflow parts in database spaces on separate hard disks.
· For a BTREE structure
Allocate the index and data parts in database spaces on separate hard disks.
4.4 Estimating the Required Amount of Database Space
This section explains how to estimate the required amount of database space for each type of storage structure.
Criteria are presented later for determining values used in the formulas, such as utilization rates. However, since
these values differ depending on the data, ranges of values are given. The user should make space estimates with
some surplus built in. (That is, multiply the estimates by a safety factor.)
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