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What are the potential drawbacks associated with using the SSTF disk scheduling algorithm?

What are the potential drawbacks associated with using the SSTF disk scheduling algorithm?

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:** What are the potential drawbacks associated with using the SSTF disk scheduling algorithm? **Answer:** (Not provided in the image.) **Explanation:** This question likely pertains to the SSTF (Shortest Seek Time First) disk scheduling algorithm. The SSTF algorithm selects the disk I/O request that is closest to the current head position, minimizing seek time. However, this approach may lead to certain drawbacks: 1. **Starvation:** SSTF can cause starvation, where longer requests are indefinitely delayed if there are always closer requests arriving. 2. **Unpredictability:** Since SSTF depends on the current position of the disk head and incoming requests, it's difficult to predict response times. 3. **Complexity:** In some cases, SSTF's decision-making process based on shortest seek time can be complex compared to other simpler algorithms like FCFS (First-Come, First-Served). Graphs or Diagrams: The original image does not contain any graphs or diagrams. If there were any graphs, a typical explanation might involve showing how SSTF handles requests compared to other algorithms, highlighting issues like starvation or response time variability.
Transcribed Image Text:**Question:** What are the potential drawbacks associated with using the SSTF disk scheduling algorithm? **Answer:** (Not provided in the image.) **Explanation:** This question likely pertains to the SSTF (Shortest Seek Time First) disk scheduling algorithm. The SSTF algorithm selects the disk I/O request that is closest to the current head position, minimizing seek time. However, this approach may lead to certain drawbacks: 1. **Starvation:** SSTF can cause starvation, where longer requests are indefinitely delayed if there are always closer requests arriving. 2. **Unpredictability:** Since SSTF depends on the current position of the disk head and incoming requests, it's difficult to predict response times. 3. **Complexity:** In some cases, SSTF's decision-making process based on shortest seek time can be complex compared to other simpler algorithms like FCFS (First-Come, First-Served). Graphs or Diagrams: The original image does not contain any graphs or diagrams. If there were any graphs, a typical explanation might involve showing how SSTF handles requests compared to other algorithms, highlighting issues like starvation or response time variability.
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