Alibaba Group Holding Limited
File System Data Access Method and File System

Abstract:

A method is implemented by a computing node, and includes: sending a mounting request triggered for a target logical volume to a target storage node of multiple storage nodes included in a file system; receiving storage location information of a log segment and a checkpoint corresponding to the target logical volume sent by the target storage node; reading log metadata of the log segment and the checkpoint according to the storage location information to restore a data state of the target logical volume; and performing data access processing based on the data state of the target logical volume. When multiple computing nodes access a target logical volume, read and write consistency of the multiple computing nodes can be maintained based on log information of the target logical volume maintained by various storage nodes. Furthermore, reading and writing can be performed synchronously, thus avoiding read and write conflicts.