The invention discloses a dynamic adjustment method, a
system and a device for the
backup speed limit of a
virtual machine, and the method comprises the steps: determining a
backup speed limit value of a
virtual machine needing to be backed up according to the bearable network bandwidth of a
backup storage pool and the number of virtual machines needing to be backed up; according to the backup
speed limit value of the target
virtual machine and the to-be-backed-up data volume of the virtual disks in the target virtual
machine, determining the disk backup speed
limit value of the virtual disks, and according to the disk backup speed
limit value of the virtual disks, performing disk data backup on the virtual disks at the same time; if the bearable network bandwidth of the backup
storage pool and / or the number of the virtual machines needing to be backed up are / is changed, determining the new disk backup speed
limit value of the virtual disk again, and performing disk data backup according to the new disk backup speed limit value. It can be seen that the backup flow in the
system cannot reach the bandwidth upper limit of the backup
storage pool, and the bandwidth of the backup storage
pool cannot be idle, so that large IO pressure cannot be brought to the backup storage
pool, the backup duration can be shortened, and the data backup efficiency is improved.