DISTRIBUTED STORAGE CONTROL METHOD, DEVICE, AND SYSTEM

摘要

Embodiments of the present invention provide a distributed storage control method, device, and system. The method comprises: obtaining current configuration information which comprises rack identifiers of racks that storage nodes belong to, each rack identifier corresponding to one rack; obtaining the number of racks in a distributed storage system according to the rack identifiers of the racks that the storage nodes belong to in the current configuration information; setting a data storage policy of the distributed storage system to be a first data storage policy when the number of the racks is larger than 1, the first data storage policy being used for instructing to store multiple data copies of the same data in the storage nodes of different racks; and synchronizing the data storage policy in the distributed storage system to each storage node, so that the storage node or a client stores the data based on the data storage policy, wherein the client acquires the data storage policy from the storage node. The technical solution of the embodiments of the present invention can effectively improve security and reliability of data storage.