Memory snapshot management method and device, equipment and medium

Abstract

The invention discloses a memory snapshot management method and device, equipment and a medium, and the method comprises the steps: pausing a virtual machine when a memory snapshot generation command is obtained; copying a second-level page table of the virtual machine to obtain a first snapshot page table, and setting a read-only identifier for a page table item of the second-level page table; and obtaining a corresponding memory page through a page table item of the first snapshot page table, increasing a reference count of the memory page, and recovering the virtual machine from a pause state to a running state. It can be seen that after the memory snapshot generation command is obtained, the memory snapshot of the virtual machine is created by copying the second-level page table of the virtual machine, and the created memory snapshot is still stored in the memory and does not need to be written into a disk, so that the influence on actual operation caused by writing the memory data into the disk is avoided; therefore, the creation speed of the memory snapshot is improved.

Description

technical field [0001] The invention relates to the technical field of data protection in a cloud computing environment, in particular to a memory snapshot management method, device, equipment and medium. Background technique [0002] Currently, in the common virtual machine (Virtual Machine) memory snapshot solution, the virtual machine monitor needs to suspend the virtual machine first, and then export the current memory data of the virtual machine to the disk; since the memory data needs to be written to the disk, The operation of performing memory snapshots on virtual machines is very slow, which affects the use of memory snapshots in real-world scenarios. [0003] To sum up, it can be seen that how to avoid the impact of writing the memory data to the disk on the actual operation and improve the creation speed of the memory snapshot is a problem to be solved at present. Contents of the invention [0004] In view of this, the purpose of the present invention is to pro...

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Problems solved by technology

[0002] Currently, in the common virtual machine (Virtual Machine) memory snapshot solution, the virtual machine monitor needs to suspend the virtual machine first, and then export the current memory data of the virtual machine to the disk; since the memory data needs to be written to the disk, The operation of performing memory snapshots on virtual machines is very slow, which affects the use of memory snapshots in real-world scenarios

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