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:
Feb. 11, 2020
Filed:
Jul. 11, 2017
Applicant:
Sap SE, Walldorf, DE;
Inventors:
Dirk Thomsen, Berlin, DE;
Werner Thesing, Lauteral, DE;
Assignee:
SAP SE, Walldorf, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F 11/14 (2006.01); G06F 9/52 (2006.01); G06F 16/23 (2019.01); G06F 11/20 (2006.01);
U.S. Cl.
CPC ...
G06F 11/1464 (2013.01); G06F 9/522 (2013.01); G06F 11/1469 (2013.01); G06F 11/1471 (2013.01); G06F 11/1474 (2013.01); G06F 11/2038 (2013.01); G06F 11/2097 (2013.01); G06F 16/2365 (2019.01); G06F 2201/80 (2013.01); G06F 2201/82 (2013.01); G06F 2201/84 (2013.01);
Abstract
A savepoint is initiated in an in-memory database system that is associated with a plurality of modified pages and comprises a pre-critical phase, a critical phase, and a post-critical phase. Thereafter, as part of the critical phase, a physical page number is assigned to each page in the critical phase. Further, as part of the critical phase, each page assigned a physical page number is individually locked. Subsequently, each page is handed over from a corresponding first thread to a corresponding second thread to copy such page into a corresponding shadow page as part of the post-critical phase.