DATA STORAGE METHOD, DATA RECOVERY METHOD, RELATED APPARATUS, AND SYSTEM

摘要

Data storage method, used to improve storage consistency of a distributed storage system. The method includes: performing, by a primary storage node, EC coding on a to-be-stored data segment to obtain a target EC stripe; determining, in a storage node group to which the primary storage node belongs, m+k target storage nodes used to store m+k target EC blocks of the target EC stripe; sending a preparation message to the target storage nodes; receiving a response message sent by a target storage node; and after receiving response messages of all the target storage nodes, sending an execution message to the target storage nodes, to instruct the target storage nodes to write target EC blocks that are in preparation logs. Further a data recovery method and a related apparatus are provided.