The present society is without any doubt an information society. The implementation of complex informatics applications needed to support the various organizations, most of them with geographically distributed offices, resulted in the need for distributed database systems capable to ensure high...

A possibility of a temporary disconnection of database service exists in many computing environments. It is a common need to permit a participating site to lag behind and re-initialize to full recovery. It is also necessary that active transactions view a globally consistent system state for...

This research investigates the problem of allocating database fragments across a set of computers connected by a communication network. A mathematical model is presented to aid designers in the development of distributed database systems. The model takes into account the pattern of usage of the...