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:
Mar. 18, 2003
Filed:
Feb. 24, 2000
Craig Alan Friske, San Jose, CA (US);
James Alan Ruddy, Gilroy, CA (US);
Akira Shibamiya, Los Altos, CA (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A reorganizer utility performs an online reorganization of a database that provides applications with concurrent access to data during an iterative process of log apply operations to a shadow version of the data. The reorganizer continues this iterative process of log apply operations until an estimate of an elapsed time necessary to complete a last iteration is less than or equal to a user-specified maximum length of time that read-only (RO) access may be provided to the data. When this threshold is reached, the reorganizer performs the last iteration, which includes draining all applications making modifications to the data; allowing read-only access to the data, performing log apply operations against the shadow version of the data, and then switching all of the applications to the shadow data.