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1. (WO2018014650) DISTRIBUTED DATABASE DATA SYNCHRONISATION METHOD, RELATED APPARATUS AND SYSTEM

Pub. No.:    WO/2018/014650    International Application No.:    PCT/CN2017/085486
Publication Date: Fri Jan 26 00:59:59 CET 2018 International Filing Date: Wed May 24 01:59:59 CEST 2017
IPC: G06F 17/30
Applicants: HUAWEI TECHNOLOGIES CO., LTD.
华为技术有限公司
Inventors: TAO, Weizhong
陶维忠
WU, Gang
吴刚
Title: DISTRIBUTED DATABASE DATA SYNCHRONISATION METHOD, RELATED APPARATUS AND SYSTEM
Abstract:
In the data synchronisation method provided by the present invention, a source data node processes normally the data operating commands sent by an application client and generates a data replication log to send to a target data node. When updating, the target data node receives the data replication log sent by the source data node. When the version of the source data node is higher than the version of the target data node, the target data node first caches the replication log, and after implementing version update of the target data node version, implements data replication on the basis of the cached replication log, thus implementing synchronisation between the source data node and the target data node. Compared to the prior art, the upgrading method provided in the embodiments of the present invention enables a source data node and a target data node to process data operating commands sent by an application client whilst upgrading, improving the reliability of the distributed database.