Hypervisor-based server duplication system and method and storage medium storing server duplication computer program

A method of duplicating a primary server into a standby server that is a fault tolerance partner of a primary server, comprising:

• generating a first FS VM on a hypervisor of the primary server that provides a file system that is outsourced by a USER VM generated on the hypervisor of the primary server;
• generating a second FS VM on a hypervisor of the standby server that provides the file system that is outsourced by the USER VM that is duplicated on the hypervisor of the standby server;
• and
• duplicating a buffer cache that the first FS VM manages in conjunction with the file system, into a buffer cache that the second FS VM manages in conjunction with the file system,
• wherein the respective hypervisor of the primary server and the respective hypervisor of the standby server comprise hypervisor-based fault tolerance modules, respectively.

A server duplication system, comprising:

• a primary server comprising a hypervisor including a hypervisor-based fault tolerance module and a first file system virtual machine (FS VM);
• and
• a first standby server comprising a hypervisor including a hypervisor-based fault tolerance module that exchanges data with a fault tolerance module provided on the hypervisor of the primary server and duplicates the primary server;
• wherein the first FS VM provides a first file system that is shared by a USER VM generated on the hypervisor of the primary server, and disposes a buffer cache that is used in conjunction with the first file system on virtual memory allocated to the first FS VM;
• and
• wherein the first FS VM is duplicated into the standby server using the hypervisor-based fault tolerance module of the primary server and the hypervisor-based fault tolerance module of the standby server, by duplicating the buffer cache of the first FS VM into a buffer cache of a second FS VM generated on the hypervisor of the first standby server.