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:
Jan. 14, 2003
Filed:
Dec. 17, 1999
Robert M. Fleischman, Concord, NH (US);
Openwave Systems Inc., Redwood City, CA (US);
Abstract
A database structure is disclosed that is particularly suited to Usenet servers. The database is thread-hot, synchronized, and highly parallel. In addition, the database structure enables high speed read/write activity with low latency search processes. The database is statically sized, self-expiring, and self-reparing. No throttling or down-time is required in the normal course of operations. The database is accompanied by several caches to provide a system capable of high perfomance Usenet operations. The invention comprises a “key-value” database, several pointers, linked lists, locks, and queues. All of these elements are arranged to operate in a synergistic manner to achieve a highly efficient history database. Under normal conditions, most of the queries from newsfeeds can be satisfied from a cache of the latest history database entries because many of the newsfeeds will offer the same articles as the other newsfeeds. The same cache also provides space in which to store and aggregate the latest additions to the database such that both “read” and “write” operations to the disk are optimized.