Chapter Questions
Define processor mobility from data management and transaction execution viewpoints. Identify the set of problems exclusive to each.
In the presence of processor mobility, data and transactions acquire exclusive properties. Identify and explain these properties. How do they affect database query processing?
Explain the difference between location-dependent, location-independent, and location-free queries. Give at least two real-life examples of each of them.
Explain the problems of location-dependent data distribution. How do they affect database integrity and consistency. Are they similar to problems of data distribution in federated and multidatabase systems? Explain your answer.
Give your own thoughts on the effect of mobility on database consistency, database integrity, database distribution, and transaction execution.