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Consider Fig. 6-4. Suppose that in step (o) C requested S instead of requesting R. Would this lead to deadlock? Suppose that it requested both S and R.

Consider Fig. 6-4. Suppose that in step (o) C requested S instead of requesting R. Would this lead to deadlock? Suppose that it requested both S and R.

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
Problem 1PE
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Consider Fig. 6-4. Suppose that in step (o) C requested S instead of requesting R.
Would this lead to deadlock? Suppose that it requested both S and R.

442 DEADLOCKS СНAР. 6 A в Request R Request S Request S Request T Release S Request T Request R Release T Release R Release S Release T Release R (a) (b) (c) 1. A requests R 2. B requests S 3. C requests T 4. A requests S 5. B requests T 6. C requests R deadlock S S (d) (e) (f) B) S (h) (i) 1. A requests R 2. C requests T 3. A requests S 4. C requests R 5. A releases R 6. A releases S no deadlock S (k) (1) (m) (n) o) ロo) S R R (p) Figure 6-4. An example of how deadlock occurs and how it can be avoided. B.
Transcribed Image Text:442 DEADLOCKS СНAР. 6 A в Request R Request S Request S Request T Release S Request T Request R Release T Release R Release S Release T Release R (a) (b) (c) 1. A requests R 2. B requests S 3. C requests T 4. A requests S 5. B requests T 6. C requests R deadlock S S (d) (e) (f) B) S (h) (i) 1. A requests R 2. C requests T 3. A requests S 4. C requests R 5. A releases R 6. A releases S no deadlock S (k) (1) (m) (n) o) ロo) S R R (p) Figure 6-4. An example of how deadlock occurs and how it can be avoided. B.
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