Accession Number : ADD016101

Title :   Real-Time Distributed Data Base Locking Manager.

Descriptive Note : Patent Application, Filed 1 Jun 93,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Tavares, Carlos ; Tavares, Durval

Report Date : 01 Jun 1993

Pagination or Media Count : 39

Abstract : A method of data sharing between processors on the same network utilizes token migration for providing a data locking mechanism. A token migrates between the processors for each original data item and its replicas. Only the processor having possession of the token can perform certain operations such as updating and transmitting this updated information to the other processors. Two different queuing arrangements are described for giving up or retaining possession of the token when a processor, not in possession of the token makes a request for the token.

Descriptors :   *DATA TRANSMISSION SYSTEMS, *PATENT APPLICATIONS, MIGRATION, NETWORKS, REPLICAS, SHARING, TRANSMITTING, COMBAT INFORMATION CENTERS, SUBMARINES, QUEUEING THEORY

Subject Categories : Telemetry

Distribution Statement : APPROVED FOR PUBLIC RELEASE