VIRTUAL MACHINE CHANGE BLOCK TRACKING
First Claim
1. A system configured to backup a virtual machine, the system comprising:
- a client device comprising computer hardware, wherein the client device includes;
a virtual machine (VM) executed by a hypervisor, wherein the VM comprises a virtual hard disk file and a change block bitmap file, wherein the virtual hard disk file stores data associated with a virtual hard disk;
a driver module under control of the hypervisor, wherein the driver module is configured to;
intercept a first write operation generated by the VM to store data in a first sector,determine an identity of the first sector based on the intercepted write operation,determine an entry in the change block bitmap file that corresponds with the first sector, andmodify the entry in the change block bitmap file to indicate that data in the first sector has changed; and
a data agent configured to gather data for use in performance of an incremental backup of the VM based on the change block bitmap file in response to an instruction from a storage manager, wherein the incremental backup comprises the data in the first sector.
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Accused Products
Abstract
According to certain aspects, a system includes a client device that includes a virtual machine (VM) executed by a hypervisor, a driver located within the hypervisor, and a data agent. The VM may include a virtual hard disk file and a change block bitmap file. The driver may intercept a first write operation generated by the VM to store data in a first sector, determine an identity of the first sector based on the intercepted write operation, determine an entry in the change block bitmap file that corresponds with the first sector, and modify the entry in the change block bitmap file to indicate that data in the first sector has changed. The data agent may generate an incremental backup of the VM based on the change block bitmap file in response to an instruction from a storage manager, where the incremental backup includes the data in the first sector.
91 Citations
21 Claims
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1. A system configured to backup a virtual machine, the system comprising:
a client device comprising computer hardware, wherein the client device includes; a virtual machine (VM) executed by a hypervisor, wherein the VM comprises a virtual hard disk file and a change block bitmap file, wherein the virtual hard disk file stores data associated with a virtual hard disk; a driver module under control of the hypervisor, wherein the driver module is configured to; intercept a first write operation generated by the VM to store data in a first sector, determine an identity of the first sector based on the intercepted write operation, determine an entry in the change block bitmap file that corresponds with the first sector, and modify the entry in the change block bitmap file to indicate that data in the first sector has changed; and a data agent configured to gather data for use in performance of an incremental backup of the VM based on the change block bitmap file in response to an instruction from a storage manager, wherein the incremental backup comprises the data in the first sector. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of backing up a virtual machine, the method comprising:
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intercepting, by a driver under the control of a hypervisor which executes on a client computing device, a first write operation generated by a virtual machine (VM) to store data in a first sector of a virtual hard disk, wherein the VM is executed by the hypervisor, wherein the VM comprises a virtual hard disk file and a change block bitmap file, and wherein the virtual hard disk file stores data associated with the virtual hard disk; and with the client computing device, determining an identity of the first sector based on the intercepted write operation; determining an entry in the change block bitmap file that corresponds with the first sector; and modifying the entry in the change block bitmap file to indicate that data in the first sector has changed. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. (canceled)
Specification