Online migration method, device and system
A file system and area technology, applied in the field of communication, can solve the problems such as the inability of the virtual machine to start, the inability of the business to run normally, and the inability to guarantee the data consistency.
Active Publication Date: 2017-12-29
HUAWEI CLOUD COMPUTING TECH CO LTD
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Problems solved by technology
However, for non-LVM volumes, the data consistency cannot be guaranteed, resulting in the failure of the migrated virtual machine to start or the normal operation of the business
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[0119] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0120] In the field of communications, cloud computing in a narrow sense refers to the delivery and use mode of information technology (English: Information Technology, referred to as: IT) infrastructure, which refers to obtaining the required resources through the network in an on-demand and easy-to-expand manner; in a broad sense, cloud comp...
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The embodiment of the invention provides an online migration method, device and system. The method comprises the first step of creating a first memory block region when a migration command sent by a migration server is received and mounting the first memory block region in a migration directory, wherein the migration command includes the migration directory, the second step of redirecting IO of the migration directory to the first memory block region, wherein the first memory block region is used for storing data, the third step of migrating data of a local hard disk corresponding to the migration directory to a migration destination end, the fourth step of copying data in the first memory block region to the migration destination end, storing the data into the local hard disk and releasing the first memory block region, and the fifth step of ending online migration. According to the online migration method, device and system, through the IO redirection function of a file system, change data generated in the migration process are written into the first memory block region, the file-system-level snapshooting function is achieved, LVM volumes and non-LVM volumes can be supported, data consistency is achieved, and normal running of an operating system in the migration destination end and application software in the operation system after online migration is conducted is guaranteed.
Description
technical field [0001] Embodiments of the present invention relate to communication technologies, and in particular to an online migration method, device and system. Background technique [0002] Server virtualization technology is currently a hot spot, and virtual machine migration technology is a hot spot in virtualization technology because of its advantages of simplifying system maintenance and management, improving system load balancing, enhancing system fault tolerance and optimizing system power management. [0003] Wherein, the virtual machine migration technology includes physical machine-to-virtual machine migration (English: Physical-to-Virtual, P2V for short) and virtual machine-to-virtual machine migration (English: Virtual-to-Virtual, short: V2V). In the Linux operating system, for Logical Volume Manager (English: Logical Volume Manager, LVM for short) volumes, the online migration of P2V and V2V ensures the data consistency of LVM volumes through the device-le...
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IPC IPC(8): H04L29/06H04L29/08
CPCG06F9/45533G06F9/4875
Inventor 路凯
Owner HUAWEI CLOUD COMPUTING TECH CO LTD