Segment transfer protocols for a homogeneous computer network

摘要

This research is focussed on solving certain problems of distributed processing on a distributed data base, with emphasis on transaction processing. Many data bases exhibit geographic locality of reference; most of the transactions homing on a given component of the data base originate from a particular geographic region. At the same time there is a need to operate the collection of components as a single data base, to provide For occasional transactions which cross regional boundaries, and For managerial queries and information retrieval applications which span the entire data base. There are many examples of this associated with business and Industry; credit and inventory records for example. Finally, geographic locality of reference is only one of the reasons for creating logically unified but physically distributed data bases. If a data base contains information supplied by several agencies, each may Insist as a matter of policy that 'its' data be held in 'its' hardware located on 'its' premises, quite apart From technical efficiencies which may accrue.