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DBMS Korth Edition 4 Exercise 15 Question 10 (Page No. 589)

akash.dinkar12 asked in Databases Apr 1, 2019

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Consider the precedence graph of Figure 15.18. Is the corresponding schedule conflict serializable ? Explain your answer.

korth
databases
transaction-and-concurrency
descriptive

akash.dinkar12 asked in Databases Apr 1, 2019

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akash.dinkar12 asked in Databases Apr 1, 2019

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DBMS Korth Edition 4 Exercise 15 Question 11 (Page No. 589)
What is a recoverable schedule ? Why is recoverability of schedules desirable? Are there any circumstances under which it would be desirable to allow nonrecoverable schedules ? Explain your answer.

akash.dinkar12 asked in Databases Apr 1, 2019

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akash.dinkar12 asked in Databases Apr 1, 2019

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DBMS Korth Edition 4 Exercise 15 Question 9 (Page No. 589)
Since every conflict-serializable schedule is view serializable, why do we emphasize conflict serializability rather than view serializability?

akash.dinkar12 asked in Databases Apr 1, 2019

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korth
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transaction-and-concurrency
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akash.dinkar12 asked in Databases Apr 1, 2019

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DBMS Korth Edition 4 Exercise 15 Question 8 (Page No. 589)
Consider the following two transactions: $T_1:$ $read(A);$ $read(B);$ $if A = 0$ $then$ $B := B + 1;$ $write(B);$ $T_2:$ $read(B);$ $read(A);$ $if B = 0$ $then$ $A := A + 1;$ ... $T_1$ and $T_2$ that produces a nonserializable schedule. $c$. Is there a concurrent execution of $T_1$ and $T_2$ that produces a serializable schedule ?

akash.dinkar12 asked in Databases Apr 1, 2019

by akash.dinkar12

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korth
databases
transaction-and-concurrency
descriptive

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akash.dinkar12 asked in Databases Apr 1, 2019

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DBMS Korth Edition 4 Exercise 15 Question 7 (Page No. 589)
Explain the distinction between the terms $serial$ schedule and $serializable$ schedule.

akash.dinkar12 asked in Databases Apr 1, 2019

by akash.dinkar12

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korth
databases
transaction-and-concurrency
descriptive

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