CSE3330 Homework #5
Due on Wednesday December 8, before midnight
Worth 4% of the final grade

  1. (50 points) Solve Problem 18.19 from the textbook.

  2. (50 points) Suppose we have a file of 1,000,000 records, each record has 100 bytes. Suppose disk blocks are 1024 bytes long. Suppose pointers to records and to blocks are 5 bytes long. Determine the number of disk accesses to do a successful lookup for a record for each of the cases below. Also determine the amount of disk space you need to store the data and the indexes used in the cases below. Explain your answers.
    1. (10 points) The file is stored as a heap file.
    2. (15 points) The file is stored as a sequential file ordered by a key and binary search is used.
    3. (25 points) Secondary indexing is used using a B+-tree index. A search key field requires 10 bytes. Consider the worst case.

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Last modified: 11/2/10 by Leonidas Fegaras