Beijing Jingdong Shangke Information Technology Co., Ltd.

Beijing Jingdong Century Trading Co., Ltd.

China Institute of Building Standard Design & Research

Wenbin Luo

Bo Zhang

Peng Gao

Juan Li

Xinping Wang

Yang Zheng

Xiaolong Yang

Jiachen Wang

Wanyuan Yang

Bichuan Chi

Provided are a data replica storage method, a terminal apparatus, and a server apparatus, which help to improve the reliability of a distributed data storage system without a central node and reduce an amount of migrated data when the number of nodes of the system changes. The method comprises: for each data replica to be stored, selecting child nodes level by level from a pre-selected intermediate node until a leaf node according to a tree-structured a distributed data storage system without a central node, and determining the leaf node as a target storage position of the data replica, selection of a child node comprising: combining an identification of data to be stored and an identification of a child node into a host image, obtaining a mapping value related to the child node using a preset mapping mode, selecting a sub-node of a central node according to the mapping value, and resetting a mapping relationship before each time when the child node is selected; and storing all data replicas to be stored at the target storage positions of the data replicas.

Data copy storage method, terminal apparatus, and server apparatus

Growing community of inventors

Beijing, China

Wenbin Luo