A method and device for deleting a snapshot disk of a virtual machine

Abstract

A method and device for deleting a snapshot disk of a virtual machine is disclosed. The method comprises the following steps of when receiving an instruction to delete a first snapshot disk, judging whether the remaining space of a storage pool where a second snapshot disk adjacent to the first snapshot disk is located is not less than the space occupied by the first snapshot disk; if not, determining whether there is a storage pool having a second snapshot disk backup condition among all the storage pools that can be used by the virtual machine system for managing the virtual machine, and ifyes, backing up the second snapshot disk to a third snapshot disk; after backing up the second snapshot disk, merging the first snapshot disk into the second snapshot disk, and judging whether the merging is successful or not; if not, recovering the second snapshot disk by using a 32-bit snapshot disk rollback; and if yes, deleting the first and third snapshots. In this manner, it is ensured thatthe process of deleting the first snapshot disk is not prone to errors and interruptions, and that the second snapshot disk can be restored if the merging of the first snapshot disk fails.

Description

technical field [0001] The invention relates to the field of virtual machines, in particular to a method and device for deleting a snapshot disk of a virtual machine. Background technique [0002] The snapshot of the virtual machine saves the state of the virtual machine at a specified point in time. By using the snapshot, the virtual machine can be restored to a previous state, but the disk space occupied by the snapshot (referred to as the snapshot disk) is very huge. Therefore, it is necessary to manage the snapshot disk in a timely manner and delete the snapshot disk according to the needs of the user. However, when deleting the snapshot disk, the snapshot may fail to be deleted. If the deletion fails, it will cause various problems such as errors in the data merge of the snapshot disk in the snapshot manager. , so a method capable of controlling the process of deleting the snapshot disk is needed. Contents of the invention [0003] In order to solve the above technic...

AI Technical Summary

Problems solved by technology

[0002] The snapshot of the virtual machine saves the state of the virtual machine at a specified point in time. By using the snapshot, the virtual machine can be restored to a previous state, but the disk space occupied by the snapshot (referred to as the snapshot disk) is very huge. Therefore, it is necessary to manage the snapshot disk in a timely manner and delete the snapshot disk according to the needs of the user. However, when deleting the snapshot disk, the snapshot may fail to be deleted. If the deletion fails, it will cause various problems such as errors in the data merge of the snapshot disk in the snapshot manager. , so there is a need for a method that can control the process of deleting snapshot disks

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