A method, system and device for online migration of raw disk files
A disk file and bare disk technology, applied in the field of online migration of bare disk files, can solve the problems of slow migration speed, high user storage space occupation, inability to use reflink mode, etc., to achieve the effect of improving migration speed and saving space occupancy
Active Publication Date: 2022-05-10
北京浪潮数据技术有限公司
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Problems solved by technology
[0003] However, when performing an online migration operation, the existing technology is to first copy the snapshot file to the target storage pool, and then perform the migration operation on the raw disk file. Since the raw disk file is used by the virtual machine during the online migration process, the raw disk file The data will change, the migration operation cannot use the reflink mode, and all the raw disk files can only be migrated to the target storage pool. However, there is no shared file data between the raw disk files and the snapshot files in the target storage pool, which occupies the disk. Twice the space, resulting in high user storage space usage and slow migration speed
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[0037] The core of the present application is to provide a method, system, device and readable storage medium for online migration of raw disk files, which are used to reduce the space occupation of raw disk files during online migration and improve migration speed.
[0038] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.
[0039] Please refer to figure 1 , figure 1 It is a flowchart of a method for onlin...
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This application discloses a method for online migration of raw disk files, including: calculating the difference between the first snapshot file and the first raw disk file; copying the first raw disk file to the target storage pool; Create a virtual machine on a raw disk file, and take a snapshot of the second raw disk file; switch the virtual machine to run on the second raw disk file; write the difference into the second snapshot file to complete the online migration. This application enables file data to be shared between the reconstructed second snapshot file and the second raw disk file, which saves space usage; at the same time, there is no need to copy the snapshot file, only the first snapshot file and the first raw disk file are needed The difference between them is enough to increase the migration speed. The present application also provides a system, device and readable storage medium for online migration of raw disk files, which have the above beneficial effects.
Description
technical field [0001] The present application relates to the field of online migration of raw disk files, in particular to a method, system, device and readable storage medium for online migration of raw disk files. Background technique [0002] On the virtualization platform, online disk snapshot operations can be performed on raw disk files. When taking an online disk snapshot, first suspend the virtual machine, then use the reflink function of the file system to quickly copy the current file, copy the snapshot file of the current disk, and finally resume the virtual machine. When using reflink to copy, the file data is not really copied at the file system level, but only the metadata of the file is copied and a new index node is created, so the copy speed is very fast; at the same time, because the file data is not copied, the disk The usage is still double the space of the current file data. After the virtual machine is resumed, when the virtual machine modifies the r...
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IPC IPC(8): G06F16/11G06F9/455
CPCG06F16/119G06F16/128G06F9/45558G06F2009/45575G06F2009/4557
Inventor 王亮周胜利
Owner 北京浪潮数据技术有限公司