Abstract: A file system cloning method and apparatus is provided. One example method includes: receiving, by a destination storage system, first information sent by a source storage system; creating, by the destination storage system, a cloned file system of the file system based on the first information; receiving, by the destination storage system, a first data read request, wherein the first data read request comprises an identifier of a first data block, wherein the first data block belongs to data of a file in the clone file system; sending, by the destination storage system, a first data obtaining request to the source storage system in response to the first data read request, wherein the first data obtaining request comprises the identifier of the first data block; and receiving, by the destination storage system, the first data block from the source storage system.

Abstract: A storage device stores a data copy in a form of a data backup chain. The data backup chain records data copies in the storage device in a time sequence of backing up the data copies to the storage device. Any data access instance has a data access function, and the data access instance can process a data access request. The data access instance may perform a data backup, and back up data in storage space of the data access instance to the storage device as a data copy in the data backup chain. With support of the storage device, the data access instance further has a data disaster recovery function and a data tiering function.

Abstract: A file system cloning method and apparatus is provided. In the method, a destination storage system first receives first information from a source storage system in which a file system runs. The first information is used to indicate a data layout of the file system. Then, the destination storage system creates a cloned file system of the file system based on the first information.

Abstract: A file system cloning method and apparatus is provided. In the method, a destination storage system first receives first information from a source storage system in which a file system runs. The first information is used to indicate a data layout of the file system. Then, the destination storage system creates a cloned file system of the file system based on the first information.