Semantic paging on intelligent discs

In order to apply Artificial Intelligence techniques like inferencing to large (109-1012 bit) data bases, an intelligent secondary memory is proposed that is capable of extracting a subgraph from a graph stored in it for further processing in a conventional or special purpose computer. The “pointer transfer” technique developed for CASSM is used to efficiently mark and output a subgraph stored in one file, and a simple technique is proposed to link parts of the subgraph stored on different files. Besides proposing a useful secondary memory system for applying Artificial Intelligence techniques to large data bases, this paper attacks one of the most difficult problems in distributed data base systems, which is the generation of “homomorphic query fragments” that automatically carry the query from one file to other files needed to resolve the query.