Virtual server backup is the copying of data stored on a virtual server to guard against data loss.
Virtual server backups can be accomplished using conventional backup software. So the backup software must be installed on each virtual machine, and backups will run normally to any conventional backup target. While this is the most straightforward approach, it can lead to resource contention.
The additional resources needed to execute a backup may compromise the performance of the virtual machines on the physical server being backed up. In addition, a backup software license is required for each virtual machine that needs to be backed up necessarily.
Virtualization-specific backup products which interface directly with the virtualization platform. Additionally capture point-in-time snapshots of the entire virtual machine state address the issue of resource contention. But while this allows for fast and complete restoration of a virtual machine, it’s typically necessary to restore the entire snapshot consequently. Even if only one file is lost or corrupted. Hence virtual server backup tools are emerging that address file-level restore.
Virtual server backup is primarily an enterprise backup procedure performed on all virtual servers. Typically, most server virtualization hypervisors have a built-in component for data backup procedures. Otherwise a third-party application is installed on each virtual server instance.
So the virtual server hypervisor or the external backup application connects with a local or remote backup storage device to initiate and execute the backup process. Depending on the capabilities of backup software, a virtual server can be backed up as an entire virtual machine image/snapshot or as an incremental file level backup.
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