Mobile computing within a distributed deductive database

Abstract

Mobile computing is a component that will be included in many future computing environments. This paper presents a scheme that will allow the addition of a mobile component to an existing distributed deductive database. This scheme must allow for the following features: 1) data replication on the mobile unit, 2) transaction logging to log changes both in the mobile user's database and in the network's database, 3) conflict resolution when both copies update the same record, and 4) reconnection procedures to update both copies upon reconnection. To facilitate data replication and reconnection updates, we propose the establishment of "Ghost Nodes" in the network database to keep track of data of interest to the mobile user. © 1997 ACM.