公开(公告)号：US11921699B1

公开(公告)日：2024-03-05

申请号：US18067676

申请日：2022-12-16

Applicant: Amazon Technologies, Inc.

Inventor： Upendra Govindagowda ,  Anand Kumar Thakur ,  David Charles Wein ,  Alexandre Olegovich Verbitski ,  James C Nasby ,  Hong Yang ,  Gaurav Kumar Gupta

IPC: G06F16/00 ,  G06F16/11 ,  G06F16/21 ,  G06F16/23 ,  G06F16/27 ,  G06F11/20

CPC classification number: G06F16/2365 ,  G06F16/11 ,  G06F16/219 ,  G06F16/2322 ,  G06F16/27 ,  G06F11/2023 ,  G06F2201/84

Abstract: Lease-based consistency may be implemented for databases to handle failovers. A database node may obtain a consistency lease that describes a point in time determined from a time-to-live amount added to a consistent point in time for database data. While the consistency lease is valid, Multi-version Concurrency Control (MVCC) snapshots assigned by the database node can be used to handle requests to access the database data. Once expired, the database node may have to renew the consistency lease in order to continue to handle write and read requests.