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:
Aug. 31, 1999
Filed:
Dec. 16, 1997
William M Pitts, Los Altos, CA (US);
INCA Technology, Inc., Los Altos, CA (US);
Abstract
A client (24) in a digital computer network that employs server-driven consistency accesses a file (26) that a caching site (22) supplies from an image of the file (26) projected from a server (28). When the file (26) becomes inactive, the site (22) saves the file onto local permanent storage together with file metadata. A subsequent request to the site (22) to access the file (26) retrieves from local storage the metatadata, including a file-last-write-time attribute. The caching site (22) compares the locally retrieved file-last-write-time attribute with a server supplied file-last-write-time attribute. If the two attributes are identical, then the caching site: 1. reconnects to the projected file image present in storage at the site (22); 2. re-establishes server-driven consistency over the projected file image at the caching site (22); and 3. uses data from the file image retrieved from local storage to respond to a subsequent read request from the client (24).