DeeDS towards a distributed and active real-time database system
S.F. Andler, Jörgen Hansson, Joakim Eriksson, Jonas Mellin, Mikael Berndtsson, Bengt Eftring · ACM SIGMOD Record · 1996
Introduction There is a great need for building research prototypes of real-time database systems, because existing techniques are often ad hoc or concealed in internal solutions, and few, if any, commercial offerings exist. As real-time applications inherently use reactive mechanisms, and a wealth of results now exists on active database management systems [5], we decided to build DeeDS, a [D]istributed Activ[e], Real-Tim[e] [D]atabase [S]ystem prototype. This research effort is challenging due to the unique combination of reactive mechanisms, distributed technology, dynamic scheduling, and integrated monitoring, under a mixture of soft and hard real-time constraints. To make all this feasible with a limited amount of man-power, we have taken a deliberate approach of building with existing components where possible, and including only those features absolutely necessary to obtain the benefit of each of the architectural dimensions. At the same time, features a