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. 23, 2021
Filed:
Jan. 16, 2019
Applicant:
Emc Ip Holding Company Llc, Hopkinton, MA (US);
Inventors:
Assignee:
EMC IP Holding Company LLC, Hopkinton, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F 9/46 (2006.01); G06F 9/54 (2006.01); G06F 9/52 (2006.01); G06F 16/22 (2019.01); G06F 16/23 (2019.01); G06F 12/1018 (2016.01);
U.S. Cl.
CPC ...
G06F 9/54 (2013.01); G06F 9/52 (2013.01); G06F 16/22 (2019.01); G06F 16/2365 (2019.01); G06F 12/1018 (2013.01); G06F 2201/00 (2013.01); G06F 2205/00 (2013.01); G06F 2209/52 (2013.01);
Abstract
Embodiments for providing compare and swap (CAS) functionality to key value storage to allow multi-threaded applications to share storage devices and synchronize multiple concurrent threads or processes. A key-value application programming interface (API) is modified to include a CAS API in addition to the standard Put and Get APIs. The CAS function uses a key, expected old value, and new value to compare and swap an existing key value only if its current value equals the expected old value. Hash values of the key value and expected old value may be used by the CAS function to improve performance and reduce bandwidth.