Suppose that there is a database system that never fails. Is a recovery manager required for this system?
Answer to relevant QuestionsConsider a file system such as the one on your favorite operating system.a. What are the steps involved in creation and deletion of files, and in writing data to a file?b. Explain how the issues of atomicity and durability ...Consider the following two transactions: T1: read (A); read (B); if A = 0then B: = B + 1; write (B). T2: read (B); read (A); if B = 0 then A: = A + 1; write (A). Let the consistency requirement be A = 0 ∨ B = 0, ...What benefit does rigorous two-phase locking provide? How does it compare with other forms of two-phase locking?Locking is not done explicitly in persistent programming languages. Rather, objects (or the corresponding pages) must be locked when the objects are accessed. Most modern operating systems allow the user to set access ...Under a modified version of the timestamp protocol, we require that a commit bit be tested to see whether a read request must wait. Explain how the commit bit can prevent cascading abort. Why is this test not necessary for ...
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