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Virtual machine backup with efficient checkpoint handling based on a consistent state of the virtual machine of history data and a backup type of a current consistent state of the virtual machine
Virtual machine backup with efficient checkpoint handling based on a consistent state of the virtual machine of history data and a backup type of a current consistent state of the virtual machine
According to one embodiment, a system in response to a request to back up a virtual machine (VM) to a backup storage system, retrieves history data from the backup storage system. The history data has been previously backed up in the backup storage system during a previous backup operation of the VM. The history data includes a change tracking identifier (ID) associated with a consistent state of a VM disk attached to the VM at the point-in-time of the previous backup operation. The system validates the history data against a current configuration of the VM. The current configuration includes information of one or more current consistent states of the VM disk. The system determines a backup type for each of the current consistent states based on the validated history data. The system backs up each of the current consistent states based on the backup type.
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