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Suppose that you have formatted your disk with a block size of 1024 bytes and assume that we have 10,000 CAR records of fixed length. A block pointer is 7 bytes long (P=7), and a record pointer is 5 bytes long (Pr=5). Each CAR record has the following fields: License_number (20 bytes), Model (8 bytes), Color (9 bytes), Brand (9 bytes), Location (40 bytes), Mileage (10 bytes), Price (8 bytes), Year (4 bytes), Manufacturer (16 bytes), and Remarks (200 bytes). The file is ordered by the key field License_number and we want to construct a primary index on License_number. (a) Calculate the blocking factor (bfr) and the number of file blocks needed to store the CAR records. Assume that records are stored unspanned. How much space remains unused per block? (b) Calculate the index blocking factor bfri. (c) Assume that the primary index is a single-level index. Calculate the number of index entries and the number of index blocks.

Suppose that you have formatted your disk with a block size of 1024 bytes and assume that we have 10,000 CAR records of fixed length. A block pointer is 7 bytes long (P=7), and a record pointer is 5 bytes long (Pr=5). Each CAR record has the following fields: License_number (20 bytes), Model (8 bytes), Color (9 bytes), Brand (9 bytes), Location (40 bytes), Mileage (10 bytes), Price (8 bytes), Year (4 bytes), Manufacturer (16 bytes), and Remarks (200 bytes). The file is ordered by the key field License_number and we want to construct a primary index on License_number. (a) Calculate the blocking factor (bfr) and the number of file blocks needed to store the CAR records. Assume that records are stored unspanned. How much space remains unused per block? (b) Calculate the index blocking factor bfri. (c) Assume that the primary index is a single-level index. Calculate the number of index entries and the number of index blocks.

Database System Concepts
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
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Question 1. Suppose that you have formatted your disk with a block size of 1024 bytes and assume that we have 10,000 CAR records of fixed length. A block pointer is 7 bytes long (P=7), and a record pointer is 5 bytes long (Pr=5). Each CAR record has the following fields: License_number (20 bytes), Model (8 bytes), Color (9 bytes), Brand (9 bytes), Location (40 bytes), Mileage (10 bytes), Price (8 bytes), Year (4 bytes), Manufacturer (16 bytes), and Remarks (200 bytes). The file is ordered by the key field License_number and we want to construct a primary index on License_number . (a) Calculate the blocking factor (bfr) and the number of file blocks needed to store the CAR records. Assume that recards are stored unspanned. How much space remains unused per block? (b) Calculate the index blocking factor bfri . (c) Assume that the primary index is a single-level index. Calculate the number of index entries and the number of index blocks.
Transcribed Image Text:Question 1. Suppose that you have formatted your disk with a block size of 1024 bytes and assume that we have 10,000 CAR records of fixed length. A block pointer is 7 bytes long (P=7), and a record pointer is 5 bytes long (Pr=5). Each CAR record has the following fields: License_number (20 bytes), Model (8 bytes), Color (9 bytes), Brand (9 bytes), Location (40 bytes), Mileage (10 bytes), Price (8 bytes), Year (4 bytes), Manufacturer (16 bytes), and Remarks (200 bytes). The file is ordered by the key field License_number and we want to construct a primary index on License_number . (a) Calculate the blocking factor (bfr) and the number of file blocks needed to store the CAR records. Assume that recards are stored unspanned. How much space remains unused per block? (b) Calculate the index blocking factor bfri . (c) Assume that the primary index is a single-level index. Calculate the number of index entries and the number of index blocks.
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