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:
Apr. 04, 1989
Filed:
Jun. 13, 1986
Dennis S DeLorme, Rochester, MN (US);
Mark L Holm, Rochester, MN (US);
Wilson D Lee, Rochester, MN (US);
Peter B Passe, Rochester, MN (US);
Gary R Ricard, Rochester, MN (US);
George D Timms, Jr, Rochester, MN (US);
Larry W Youngren, Rochester, MN (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A quick recovery of logical files which provide alternate views of databases is provided. Unchanged logical file pages are journaled before being changed. Transactions affecting databases covered by the logical files are also journaled. To recover a logical file, the journaled unchanged pages of the logical file that correspond to the changed pages are inserted back into the logical file, and the transactions that were journaled are processed to provide the changes to the logical file and to the database. This brings the logical file and the underlying database up to date, and in synchronization with each other.