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Serializability

What about this?

T1 T2 R(A) add 50 to A W(A) R(A) multiply A by 2 W(A) R(B) multiply B by 2 W(B) R(B) add 50 to B W(B)

A: 100 → 300 B: 100 → 250 Serial execution order: ??? Not equivalent to T1 < T2 or T2 < T1. This schedule is not serializable.

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