File organization: Consecutive storage of relevant records on drum-type storage

Abstract

Certain structure relationships between a query set, a record set, and storage media provide an opportunity to organize the record set without redundancy on the storage media, in such a manner that all records pertinent to any query in the query set can be retrieved with minimum access time. This property between query sets and record sets has been studied for drum-type storage media. Sufficient conditions for such a property have been established. It has been shown that the two dimensional storage capability of the drum-type storage can be utilized to extend the class of query sets and record sets for which the consecutive retrieval property exists on a linear storage media