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. 29, 2023
Filed:
Jun. 01, 2021
Alibaba Singapore Holding Private Limited, Singapore, SG;
Rui Wang, Redmond, WA (US);
Zhu Pang, Bellevue, WA (US);
Qingda Lu, Bellevue, WA (US);
Shuo Chen, Bellevue, WA (US);
Jiesheng Wu, Redmond, WA (US);
Alibaba Singapore Holding Private Limited, Singapore, SG;
Abstract
Systems and methods discussed herein, based on a key-value data store including multiple-tiered sorted data structures in memory and storage, implement granularly timestamped concurrency control. The multiple-tiering of the key-value data store enables resolving the snapshot queries by returning data record(s) according to granularly timestamped snapshot lookup instead of singularly indexed snapshot lookup. Queries return a merged collection of records including updates from data structures in memory and in storage, such that a persistent storage transaction may refer to non-committed updates up to a timeframe defined by the snapshot read timestamp. This way, inconsistency is avoided that would result from merely reading data records committed in storage, without regard as to pending, non-committed updates thereto. The global timestamp further modifies the generation of the local transaction commit timestamp and the local snapshot read timestamp, so as to establish a granularly timestamped concurrency control scheme (over three levels of granularity).