Kernel state and user state data exchange method for disaster recovery of virtual container system

Abstract

The present invention relates to a kernel state and user state data exchange method for disaster recovery of a virtual container system. In one disaster recovery backup of a virtual container, data needs to be exchanged between a kernel state and a user state. The file system operation of the kernel state needs to be transmitted to a user state program for processing firstly, and the processing result is returned to the kernel state and then transmitted to an original application program. Low recovery speed of a data block is mainly caused by the need of multiple times of switching between the kernel state and the user state, and the communication efficiency of the kernel state and the user state is low. In the present invention, all recovery operations are completed by the user state by virtue of a FUSE. A FUSE file system is realized firstly, one of files therein is mapped to the /DEV/LOOP device, then the LOOP device is used as a shadow device of a disk to be recovered, and a virtual container manager enables a virtual container with the LOOP device. The access to the original hard disk is intercepted in the FUSE file system, and then the FUSE file system communicates with the server, so that efficient on-demand recovery of data is realized.

Dependencies are inferred from the claim text.