Accession Number : ADD018096

Title :   Early Commit Timestamp Computer Database Protocol.

Descriptive Note : Patent, Filed 28 Apr 94, patented 25 Jun 96,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Fortier, Paul J

Report Date : 25 Jun 1996

Pagination or Media Count : 10

Abstract : A computer database method wherein the data is organized into atomic data sets and transactions are separated into projections which operate on only one atomic data set. Multiple transactions can thereby access the same atomic data set using a plurality of projections. A projection timestamp is generated by the system initial access to the atomic data set by the projection. Read and write timestamps are maintained separately by the atomic data set. Upon each read and write command, the issuing projection timestamp is compared against the appropriate atomic data set read or write timestamp. The operation succeeds if the compared timestamps do not indicate a conflict. Upon failure the projection is restarted with a new timestamp.

Descriptors :   *DATA BASES, *DATA MANAGEMENT, *PATENTS, METHODOLOGY, EXPERIMENTAL DATA, COMPUTERS, ATOMIC PROPERTIES, READING

Subject Categories : Computer Systems

Distribution Statement : APPROVED FOR PUBLIC RELEASE