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:
Jul. 01, 2008
Filed:
Jun. 30, 2003
Michael J. Zwilling, Redmond, WA (US);
Lewis S. Bruck, Redmond, WA (US);
Sameet H. Agarwal, Redmond, WA (US);
Kangrong Yan, Issaquah, WA (US);
Michael J. Zwilling, Redmond, WA (US);
Lewis S. Bruck, Redmond, WA (US);
Sameet H. Agarwal, Redmond, WA (US);
Kangrong Yan, Issaquah, WA (US);
Microsoft Corporation, Redmond, WA (US);
Abstract
A database view of a database is created which provides a transaction-consistent view of an existing database at a previous time. Each database view contains all the information needed to, along with the primary database, determine the contents of the primary database at a previous time. The database view consists of a side file corresponding to each data file in the primary database. The side files contain a copy of all data from the corresponding data file which has been changed since the database view was created. Sparse files may be used for the side files in order to conserve space. Page table data is kept in order to allow a quick determination as to whether the page from the primary database has been modified and the old version stored in the database view side file.