Transaction Management & Concurrency Control

Based upon your understanding and reading of Transaction Management & Concurrency Control answer the following using Information Technology Project Management by Jack T. Marchewka, Third Edition:1.What is needed to restart if transaction (T3) is aborted with a rollback after checkpoint before the system failure? Explain restart of work assuming the recovery manager using deferred update. 2.Same as #1 but assume recovery manager is using immediate update approach. 3.Assuming recovery manager is using deferred update approach. Explain how the restart will impact all the transactions shown in the timeline diagram (illustrated above ? T1 to T9). 4.Same as #3 but the recovery manager is using immediate update approach. 5.Discuss (check for the help you need) the impact of restartof work if in case there is a device failure?

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