EBK DATABASE SYSTEM CONCEPTS
EBK DATABASE SYSTEM CONCEPTS
7th Edition
ISBN: 9781260049268
Author: SILBERSCHATZ
Publisher: MCG COURSE
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Chapter 18, Problem 10PE

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Practical applications of two-phase locking protocol

  • Two-phase locking protocol is used for simple applications where a single granularity is accepted...

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Practical applications of two-phase locking with multiple granularity locking protocol

  • It is used for applications where some applications access individual records and others access whole relations or substantial parts...

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Practical applications of tree protocol

  • It is used for all applications that tend to access data items in an order consistent with a particular partial order...

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Practical applications of timestamp ordering protocol

  • It is used if the application demands a concurrent execution that is equivalent to a particular serial ordering.
  • Conflicts are handled by roll-back of transactions rather than waiting and schedules are also not recoverable...

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Practical applications of validation protocol

  • If the probability of two conflict of two concurrently executing transaction is low, then this protocol can be used...

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Practical applications of multiversion timestamp ordering protocol

  • It is used it timestamp ordering is appropriate...

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Practical applications of multiversion multiversion two phase locking protocol

  • It allows read-only transactions to always commit without waiting.
  • Update transactions follow two phase locking protocol and allows recoverable schedules with conflicts solved by waiting rather than roll-back...

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After playing our giving implementation, your task is to implement Dinning Philosophers with semaphore in C, by including and Your implementation will require creating five philosophers, each identified by a number 0.4. Each philosopher will run as a separate thread. Create threads using Pthreads as discussed in the Lecture slides on Chapter 4 and Practice Lab on Threads. Your solution needs to accomplish the following: Implement in C (15 points) 1. dp1.c - You are to provide your solution to this assignment as a single C program named 'dp1.c using semaphore. Explain in you code (as comments) that the dead lock will happen or not. If there is a possible deadlock, you can simply solve the deadlock by pick the fork in order like the first solution in our slides. Solve Deadlock by Footman (15 points) 1. Here is a new solution to overcome the deadlock. The Dining Philosophers decide to hire a footman whose task to allow only four philosophers to sit on the table. When entering and…
8.4 Self-Bias Configuration 20. Determine Zi. Zo. and A,, for the network of Fig. 8.73 if gf, = 3000 μS and gos = 50 μs. 21. Determine Z, Zo, and A, for the network of Fig. 8.73 if the 20-uF capacitor is removed and the parameters of the network are the same as in Problem 20. Compare results with those of Problem 20. +12 V 3.3 ΚΩ HE C₂ Vo Z Zo C₁ 10 ΜΩ Z₁ 1.1 ΚΩ Cs 20 µF FIG. 8.73 Problems 20, 21, 22, and 59.
21. Determine Zi, Zo, and A, for the network of Fig. 8.73 if the 20-μF capacitor is removed and the parameters of the network are the same as in Problem 20. Compare results with those of Problem 20. +12 V 3.3 ΚΩ +6 C₂ C₁ Z₁ 10 ΜΩ 1.1 ΚΩ Cs 20 μF FIG. 8.73 Zo
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