Real-time lock-based concurrency control in distributed database systems

In a real-time database system, it is difficult to meet all timing constraints due to the consistency requirements of the underlying database. Real-time database transaction scheduling requires the development of efficient concurrency control protocols that try to maximize the number of transactions satisfying their real-time constraints. Several distributed, lock-based, real-time, concurrency control protocols are described. The relative performance of the protocols in a nonreplicated database environment is reported. The protocols take the real-time requirements of the transactions into account in ordering data accesses, while maintaining data consistency by enforcing serializability