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:
Sep. 24, 2013
Filed:
Jan. 06, 2012
Frank LU, San Jose, CA (US);
James Qiu, Santa Clara, CA (US);
Jonathan Thatcher, Mountain View, CA (US);
Murali Vemulapati, Santa Clara, CA (US);
Carl Wang, Cupertino, CA (US);
Terrence Barwegen, Cupertino, CA (US);
Frank Lu, San Jose, CA (US);
James Qiu, Santa Clara, CA (US);
Jonathan Thatcher, Mountain View, CA (US);
Murali Vemulapati, Santa Clara, CA (US);
Carl Wang, Cupertino, CA (US);
Terrence Barwegen, Cupertino, CA (US);
Apple Inc., Cupertino, CA (US);
Abstract
Methods, program products, and systems for checkpoint based progressive backup are described. When a system receives a request to update a page of a storage device storing database files of a database, the system can update the page and replicate the updated page in a shadow page in a backup queue. The backup queue can store multiple shadow pages, where each updated page can correspond to at most a specified number of shadow pages in the queue. Each shadow page can be associated with a timestamp of a latest update. At pre-specified temporal checkpoints, the system can write the shadow pages in the queue to a backup file in the order of the timestamps. Upon receiving a restoration request, the system can restore the database to a state as of the time of the checkpoint using the backup file.