Accession Number : ADD018086

Title :   Real-Time Distributed Data Base Locking Manager.

Descriptive Note : Patent, Filed 1 Jun 93, patented 7 May 96,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

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

Report Date : 07 May 1996

Pagination or Media Count : 19

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 BASES, *DATA MANAGEMENT, *SHARING, *PATENTS, REAL TIME, MIGRATION, COMPUTER NETWORKS, LOCKING(MECHANICS)

Subject Categories : Computer Systems

Distribution Statement : APPROVED FOR PUBLIC RELEASE