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:
Oct. 03, 2000
Filed:
Oct. 28, 1997
Michael Malcolm, Woodside, CA (US);
Ian Telford, Waterloo, CA;
Cache Flow, Inc., , US;
Abstract
The invention provides a system and system for automatically refreshing documents in a cache, so that each particular document is refreshed no more often and no less often than needed. For each document, the cache estimates a probability distribution of times for client requests for that document and a probability distribution of times for server changes to that document. Times for refresh are selected for each particular document in response to both the estimated probability distribution of times for client requests and the estimated probability distribution of times for server changes. The invention also provides a system and system for objectively estimating the value the cache is providing for the system including the cache. The cache estimates for each document a probability distribution of times for client requests for that document, and determines a cumulative probability distribution which reflects the estimated marginal hit rate at the storage limit of the cache and the marginal advantage of adding storage to the cache.