Consider the following schedule S (ri(X): Ti reads X; wi(X): Ti writes X; Ci: Commit Ti):...

Consider the following schedule S (ri(X): Ti reads X; wi(X): Ti writes X; Ci: Commit Ti):

r1 (X) ; r2 (X) ; r2 (Y) ; r3 (Z) ; r3 (Y) ; w1 (X) ; r1 (Y) ; w3 (Z) ; C3 ; w2 (X) ; C1; C2;

Determine whether S is: conflict-serializable, (Draw the precedence graph to decide)
For each of the following concurrency control mechanisms, describe how the concurrency control mechanism handles S. (Show step by step results)

a. Strict 2PL with deadlock detection. (Show the waits-for graph if there is a deadlock)

b. Timestamping

Expert Solution

venereology answered 2 years ago

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