The I/O subsystem holds the I/O requests in the I/O queue: <90, 12, 35, 100, 28, 74, 56, 9, 3, 45, 48, 104, 3, 175, 69, 95, 34, 11, 49, 2, 78>, the initial position of the read/write head is at cylinder 50. 1. Use SSTF and SCAN for computing seek distance. 2. Explain the advantages and disadvantages of the various I/O scheduling techniques.
The I/O subsystem holds the I/O requests in the I/O queue: <90, 12, 35, 100, 28, 74, 56, 9, 3, 45, 48, 104, 3, 175, 69, 95, 34, 11, 49, 2, 78>, the initial position of the read/write head is at cylinder 50. 1. Use SSTF and SCAN for computing seek distance. 2. Explain the advantages and disadvantages of the various I/O scheduling techniques.
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
Problem 1PE
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The I/O subsystem holds the I/O requests in the I/O queue: <90, 12, 35, 100, 28, 74, 56, 9, 3, 45, 48, 104, 3, 175, 69, 95, 34, 11, 49, 2, 78>,
the initial position of the read/write head is at cylinder 50.
1. Use SSTF and SCAN for computing seek distance.
2. Explain the advantages and disadvantages of the various I/O scheduling techniques.
Please show all your work so i can see how you did it. Thanks!
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