Distributed Database Systems Exercise Solutions | Principles Of

You are given a global relation (e.g., EMPLOYEE(EmpID, Name, DeptID, Salary, ManagerID) ) and a set of applications/queries. Your task is to propose horizontal, vertical, or hybrid fragments.

F1 = σ_Dept=‘Sales’(EMPLOYEE) F2 = σ_Dept=‘Eng’(EMPLOYEE) F3 = σ_Dept≠‘Sales’ ∧ Dept≠‘Eng’(EMPLOYEE) You are given a global relation (e

: Compute total weighted cost for each candidate site. Use the formula: Total cost = Σ (reads_from_other_site × read_cost) + Σ (updates_from_other_site × update_cost). Choose site with lowest cost. You are given a global relation (e

The official solution works for 99% of failures. For the other 1%, you must be willing to forget the exercise and solve the principle. The principle is not "don't fail." The principle is "fail in a way you can survive." You are given a global relation (e