Method for a peer-to-peer data replication, devices, and systems, as well as the method for switching the master node, device, and system

摘要

Method, device, and system for peer-to-peer data replication are provided. The method includes: generating a first commit redo record attached with a CSN when a first write operation happens on a first physical entity in a master node, wherein the master node is preset with the first physical entity and a second physical entity and is connected to a first subscriber node and a second subscriber node; pushing, the first commit redo record to a first subscriber node corresponding to the first physical entity based on mapping relationships between the physical entities and the subscriber nodes, wherein the first commit redo record is used for replicating data of the first write operation from the master node to the first subscriber node, and then to the second subscriber node through pushing, by the first subscriber node, the received first commit redo record to the second subscriber node.