Incremental virtual machine backup supporting migration

摘要

A record of changes to virtual machine data of a virtual machine and a record of changes to snapshots of the virtual machine that have been received since the virtual machine was last backed up are maintained. In response to it being time to perform an incremental backup of the virtual machine, a portion of the virtual machine data is backed up based on the record of changes to the virtual machine data, and a portion of the snapshots is backed up based on the record of changes to the snapshots. In response to it being time to migrate the virtual machine to a second host device, the virtual machine data, the record of changes to the virtual machine data, the record of changes to the snapshots, and one or more of the snapshots are migrated to the second host device.

主权项

1. A method comprising:
prior to identifying a time to migrate the virtual machine to a second host device, receiving changes to virtual machine data of a virtual machine on a first host device; maintaining a record of changes to the virtual machine data that have been received since the virtual machine data was last backed up including changes to configuration information for the virtual machine comprising data used by a component of the virtual machine to implement the virtual machine; identifying a time to perform an incremental backup of the virtual machine; backing up, based on the record of changes, a portion of the virtual machine data in response to it being time to perform the incremental backup; identifying a time to migrate the virtual machine to a second host device; and migrating the virtual machine data and the record of changes to the virtual machine data to the second host device in response to it being time to migrate the virtual machine to the second host device.