Question TwoLO2Question TwoConsider the three transactions T1, T2, and T3, and the schedules S1 and S2given below.Transaction T1: r1(x), [1(z), w1(x)Transaction T2: 2(2), r2(y), w2(z), w2(y)Transaction T3: 13(x), r3(y), w3(y)andSchedule S1: r1(x), r2(z), r1(x), r3(x), r3(y), w1(x);, w3(y); r2(y), w2(z), w2(y)Schedule S2: r1(x), r2(z), r3(x), r1(z), r2(y), r3(y), w1(x), w2(z), w3(y); w2(y)Draw the serializability (precedence) for S1 and S2 and state whether eachschedule is conflict serializable. Write down the equivalent serial schedule(s) ifa schedule is serializable.29°C uao

Question Two Consider the three transactions T1, T2, and T3, and the schedules S1 and S2 given below. Transaction T1: r1(x), 1(2), w1(x) Transaction T2: 12(z), r2(y), w2(z), w2(y) Transaction T3: r3(x), r3(y), w3(y) Schedule S1: r1(x), 12(z), r1(x); r3(x); r3(y); w1(x); w3(y); r2(y); w2(z); w2(y) Schedule S2: r1(x); (2(2), r3(x), r1(z), r2(y), r3(y), w1(x), w2(z), w3(y), w2(y) Draw the serializability (precedence) for S1 and S2 and state whether each schedule is conflict serializable. Write down the equivalent serial schedule(s) if a schedule is serializable.

Question Two Consider the three transactions T1, T2, and T3, and the schedules S1 and S2 given below. Transaction T1: r1(x), 1(2), w1(x) Transaction T2: 12(z), r2(y), w2(z), w2(y) Transaction T3: r3(x), r3(y), w3(y) Schedule S1: r1(x), 12(z), r1(x); r3(x); r3(y); w1(x); w3(y); r2(y); w2(z); w2(y) Schedule S2: r1(x); (2(2), r3(x), r1(z), r2(y), r3(y), w1(x), w2(z), w3(y), w2(y) Draw the serializability (precedence) for S1 and S2 and state whether each schedule is conflict serializable. Write down the equivalent serial schedule(s) if a schedule is serializable.

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Transaction Processing

Transaction processing is a computational style generally performed by server computers, which supports interactive applications (apps). Transaction processing is also known as information processing, which divides the work into indivisible and individual operations called transactions. The transaction is a set of tasks; a single task is considered as the minimum processing unit that cannot be divided again.

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