The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 26, 1998
Filed:
Mar. 17, 1995
Michael J Bierma, New Brighton, MN (US);
Sheng-te Chiang, Circle Pines, MN (US);
Thomas P Cooper, New Brighton, MN (US);
James A Elke, Phornton, CO (US);
Katsuhiko Kihara, Yokohama, JP;
John R Jordan, St. Paul, MN (US);
Lester Y Lee, Arden Hills, MN (US);
Lee-Chin Liu, Plymouth, MN (US);
James R Mettling, Forest Lake, MN (US);
James M Plasek, Shoreview, MN (US);
Ralph E Sipple, Shoreview, MN (US);
Jennifer J Smith, Plymouth, MN (US);
Ronald Q Smith, St. Paul, MN (US);
Rajeev P Tandon, Blaine, MN (US);
Unisys Corporation, Blue Bell, PA (US);
Abstract
A system for concurrent processing of queries and transactions against a shared database. The system includes multiple processors wherein a processor is available for processing queries and another processor is available for concurrently processing transactions. A query buffer is established for performing the query search while the data accessed by transactions is available in a database cache. Control logic in a database management system distinguishes between transactions and queries and initiates file-read control for reading the file containing the database. File-read control contains logic for logical sequential reading and logical non-sequential reading of the file. Control structures provide a means for control over the load that the query is allowed to place on the system.