DATA RECOVERY METHOD, DATA RECOVERY DEVICE, AND DISTRIBUTED STORAGE SYSTEM

摘要

A data recovery method, a data recovery device and a distributed storage system are provided, where the method includes: in a case that a distributed storage system loses data of three nodes, recovering data on a target data storage node of the data on the three nodes according to data of a parity node and a data storage node without data loss; and performing degraded recovery on the remaining lost data according to the recovered data of the target data storage node. According to the embodiments of the present invention, a target data storage node first recovered is determined according to the symmetry of lost data, and the lost data of three nodes is recovered according to parity data and data that is not lost, which can improve the data recovery performance of the distributed storage system in a case that the data of three nodes is lost.