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. 24, 2010
Filed:
Sep. 28, 2007
Brian Cooper, San Jose, CA (US);
Daniel Weaver, Redwood City, CA (US);
Michael Bigby, San Jose, CA (US);
Utkarsh Srivastava, Fremont, CA (US);
Philip L. Bohannon, Cupertino, CA (US);
Ramana Yerneni, Cupertino, CA (US);
Brian Cooper, San Jose, CA (US);
Daniel Weaver, Redwood City, CA (US);
Michael Bigby, San Jose, CA (US);
Utkarsh Srivastava, Fremont, CA (US);
Philip L. Bohannon, Cupertino, CA (US);
Ramana Yerneni, Cupertino, CA (US);
Yahoo! Inc., Sunnyvale, CA (US);
Abstract
A technique is described that reduces the complexity and resource consumption associated with performing record expiry in a distributed database system. In accordance with the technique, a record is checked to see if it has expired only when it has been accessed for a read or a write. If at the time of a read a record is determined to have expired, then it is not served. If at the time of a write a record is determined to have expired, then the write is treated as an insertion of a new record, and steps are taken to treat the insertion consistently with regard to the previous expired version. A background process is used to delete records that have not been written to or actively deleted by a client after expiration.