Exercise 9.21 Modern disk drives store more sectors on the outer tracks than the inner tracks. Since the rotation speed is constant, the sequential data transfer rate is also higher on the outer tracks. The seek time and rotational delay are unchanged. Considering this information, explain good strategies for placing files with the following kinds of access patterns: 1. Frequent, random accesses to a small file (e.g., catalog relations). 2. Sequential scans of a large file (e.g., selection from a relation with no index). 3. Random accesses to a large file via an index (e.g., selection from a relation via the index). 4. Sequential scans of a small file.
Exercise 9.21 Modern disk drives store more sectors on the outer tracks than the inner tracks. Since the rotation speed is constant, the sequential data transfer rate is also higher on the outer tracks. The seek time and rotational delay are unchanged. Considering this information, explain good strategies for placing files with the following kinds of access patterns: 1. Frequent, random accesses to a small file (e.g., catalog relations). 2. Sequential scans of a large file (e.g., selection from a relation with no index). 3. Random accesses to a large file via an index (e.g., selection from a relation via the index). 4. Sequential scans of a small file.
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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