There are 100000 borrowers, 200000 copies of 190000 different books, 4 borrower
status values, 100 publisher codes, an average of 1.3 authors per book, a maximum of
100000 current loans and 10000 reservations. On-line disk storage available is 30
Mbytes. Estimate the storage requirements for an implementation of the first-level
design (Fig. 14.2). How much storage is needed for the second-level design (Fig. 15.2)?
Is there likely to be sufficient on-line disk storage for either of these designs?
(10 min)
9.The combination of hardware and software to be used for the library system
provides an average direct access time of 20 msecs. The system specification ...
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