Patent ID: 11914571
Assignee: AMAZON TECHNOLOGIES, INC.
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 13:
14. A non-transitory, computer-readable storage medium, storing program instructions that when executed by one or more computing devices cause the one or more computing devices to implement:
performing, by a first database engine head node:
sending, responsive to receiving an access request from a client, a first write request to a log-based data store for a database to perform the access request on behalf of the client, the first write request comprising an update to data of the database;
receiving, from the log-based data store, a response to the first write request comprising one or more indications of a detected conflict at the log-based data store between the update to the data of the database of the first write request to the database sent by the first database engine head node and another update to the data of the database of a second write request to the database sent by a second database engine head node;
requesting a resolution of the conflict from a primary database engine head node for the database;
receiving a resolution from the primary database engine head node indicating the first write request is to be committed; and
causing the log-based data store to commit the first write request instead of the second write request according to the resolution received from the primary database engine head node.