Concurrency Control

Question

Consider  the  following  schedules:

S1:  W2(x),  W1(x),  R3(x),  R1(x),  W2(y),  R3(y),  R3(z),  R2(x)

S2:  R3(z),  W2(x),  W2(y),  R1(x),  R3(x),  R2(z),  R3(y),  W1(x)

S3:  R2(z),  W2(x),  W2(y),  W1(x),  R1(x),  R3(x),  R3(z),  R3(y)

Which  one  of  the  above  schedules  are  conflict  equivalent?

Answer 1

Conflict Equivalent Schedules are those schedules in which Conflicting operations should be occur in same order.

By observing these None of them are conflict Equivalent to any Schedule...

Plz make me correct if i m wrong........

Comments

Yes this is the correct answer.

Answer 2

Answer : S2 and S3 are conflict Equivalent

Answer 3

S2 and S3 acc to me.

Comments

I also got the same answer but key had that all 3 all equivalent.

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It might be wrong then because there is a loop between T1 and T2 in S1.

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S2 and S3