Provisioning Storage-Optimized Virtual Machines Within a Virtual Desktop Environment

• US 20090260007A1
• Filed: 04/15/2008
• Published: 10/15/2009
• Est. Priority Date: 04/15/2008
• Status: Active Grant

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Salinas, Daniel, Schulz, Charles Otto, Kochut, Andrzej, Beaty, Kirk A.
• Granted Patent: US 8,365,167 B2
• Time in Patent Office: Days
• US Class Current: 718/1
• CPC Class Codes: G06F 9/5077 Logical partitioning of resources; Management or configuration of virtualized resources specific details on emulation or internal functioning of virtual machines G06F9/455

Abstract

A computer implemented method, a computer program product, and data processing system clone virtual machines in a virtual desktop environment. A request to clone a new virtual machine is intercepted, wherein the request was initially sent to a virtual management server. Responsive to intercepting the request, the new virtual machine is cloned from a snapshot of a master virtual machine. A delta file is created for the new virtual machine, wherein the delta file includes a base disk reference and a copied delta file. The new virtual machine is configured to read a base disk image from a snapshot of the master virtual machine. The new virtual machine is configured to write data to the copied delta file in the delta file.

Claims

1. A computer implemented method for cloning virtual machines in a virtual desktop environment, the method comprising:

intercepting a request to clone a new virtual machine, wherein the request was initially sent to a virtual management server;

responsive to intercepting the request, creating a delta file for the new virtual machine;

cloning the new virtual machine from a master virtual machine, wherein the new virtual machine is a skeleton virtual machine;

configuring the new virtual machine to read a boot disk and bootable files from a snapshot of the master virtual machine; and

configuring the new virtual machine to write data to the delta file.

2. The computer implemented method of claim 1, wherein the step of creating a delta file further comprises:

creating an initially empty delta file, wherein the initially empty delta file grows after the new virtual machine is started.

3. The computer implemented method of claim 2, wherein the initially empty delta file is an initially empty database having a size of 16 megabytes.

4. The computer implemented method of claim 1, further comprising:

configuring the new virtual machine to preferentially read data from the delta file, and to read the data from the snapshot when the data is not present in the delta file, such that the new virtual machine will always read a latest version of the data.

5. The computer implemented method of claim 1, wherein the request to clone a new virtual machine includes an identification of a user class, the method further comprising:

identifying the master virtual machine from a plurality of master virtual machines, wherein each of the plurality of master virtual machines corresponds to a different one of a plurality of user classes.

6. The computer implemented method of claim 1, wherein the intercepting step further comprises:

intercepting, at a command application proxy interface, the request to clone a new virtual machine, wherein the request was initially sent to a virtual management server.

7. A computer implemented method for provisioning virtual machines in a virtual desktop environment, the method comprising:

associating a new virtual machine with a delta file, wherein the new virtual machine is a skeleton virtual machine;

associating the new virtual machine with a snapshot of a master virtual machine, wherein the master virtual machine contains a boot disk and bootable files for the new virtual machine;

provisioning the new virtual machine in a logical partitioned platform of a data processing system.

8. The computer implemented method of claim 7, wherein the step of associating the new virtual machine with the delta file further comprises:

associating the new virtual machine with an initially empty delta file, wherein the initially empty delta file grows after when the new virtual machine is started.

9. The computer implemented method of claim 8, wherein the initially empty delta file is an initially empty database having a size of 16 megabytes.

10. The computer implemented method of claim 7, further comprising:

configuring the new virtual machine to preferentially read data from the delta file, and to read the data from the snapshot when the data is not present in the delta file, such that the new virtual machine will always read a latest version of the data.

11. The computer implemented method of claim 7, wherein the snapshot of the master virtual machine is one of a plurality of snapshots of a plurality of master virtual machines, and wherein the step of associating the new virtual machine with the snapshot of the master virtual machine further comprising:

associating the new virtual machine with the snapshot of the master virtual machine, wherein the master virtual machine corresponds to a certain user class.

12. A computer program product comprising:

a computer readable medium having computer usable program code for cloning virtual machines in a virtual desktop environment, the computer program product comprising;

computer usable program code for intercepting a request to clone a new virtual machine, wherein the request was initially sent to a virtual management server;

computer usable program code, responsive to intercepting the request, for creating a delta file for the new virtual machine;

computer usable program code for cloning the new virtual machine from a master virtual machine, wherein the new virtual machine is a skeleton virtual machine;

computer usable program code for configuring the new virtual machine to read a boot disk and bootable files from a snapshot of the master virtual machine; and

computer usable program code for configuring the new virtual machine to write data to the delta file.

13. The computer program product of claim 12, wherein the computer usable program code for creating a delta file further comprises:

computer usable program code for creating an initially empty delta file, wherein the initially empty delta file grows after the new virtual machine is started.

14. The computer program product of claim 13, wherein the initially empty delta file is an initially empty database having a size of 16 megabytes.

15. The computer program product of claim 12, further comprising:

computer usable program code for configuring the new virtual machine to preferentially read data from the delta file, and to read the data from the snapshot when the data is not present in the delta file, such that the new virtual machine will always read a latest version of the data.

16. The computer program product of claim 12, wherein the request to clone a new virtual machine includes an identification of a user class, the method further comprising:

computer usable program code for identifying the master virtual machine from a plurality of master virtual machines, wherein each of the plurality of master virtual machines corresponds to a different one of a plurality of user classes.

17. The computer program product of claim 12, wherein the computer usable program code for intercepting step further comprises:

computer usable program code for intercepting, at a command application proxy interface, the request to clone a new virtual machine, wherein the request was initially sent to a virtual management server.

18. A data processing system comprising:

a bus;

a communications unit connected to the bus;

a storage device connected to the bus, wherein the storage device includes computer usable program code for cloning virtual machines in a virtual desktop environment; and

a processor unit connected to the bus, wherein the processor unit executes the computer usable program code to intercept a request to clone a new virtual machine, wherein the request was initially sent to a virtual management server, responsive to intercepting the request, to create a delta file for the new virtual machine, to clone the new virtual machine from a master virtual machine, wherein the new virtual machine is a skeleton virtual machine, to configure the new virtual machine to read a boot disk and bootable files from a snapshot of the master virtual machine, and to configuring the new virtual machine to write data to the delta file.

19. The data processing system of claim 18, wherein the processor unit executing the computer usable program code to create a delta file further comprises:

the processor unit executing the computer usable program code to create an initially empty delta file, wherein the initially empty delta file grows after the new virtual machine is started.

20. The data processing system of claim 19, wherein the initially empty delta file is an initially empty database having a size of 16 megabytes.

21. The data processing system of claim 18, wherein the processor unit further executes the computer usable program code:

to configure the new virtual machine to preferentially read data from the delta file, and to read the data from the snapshot when the data is not present in the delta file, such that the new virtual machine will always read a latest version of the data.

22. The data processing system of claim 18, wherein the computer usable program code to clone a new virtual machine includes an identification of a user class, wherein the processor unit further executes the computer usable program code:

to identify the master virtual machine from a plurality of master virtual machines, wherein each of the plurality of master virtual machines corresponds to a different one of a plurality of user classes.

23. The data processing system of claim 18, wherein the processor unit executing the computer usable program code for intercepting the request to clone a new virtual machine step further comprises:

wherein the processor unit executing computer usable program code to intercept, at a command application proxy interface, the request to clone a new virtual machine, wherein the request was initially sent to a virtual management server.

24. A data processing system comprising:

a bus;

a communications unit connected to the bus;

a storage device connected to the bus, wherein the storage device includes computer usable program code for provisioning virtual machines in a virtual desktop environment; and

;

a processor unit connected to the bus, wherein the processor unit executes the computer usable program code to associate a new virtual machine with a delta file, wherein the new virtual machine is a skeleton virtual machine, to associate the new virtual machine with a snapshot of a master virtual machine, wherein the master virtual machine contains a boot disk and bootable files for the new virtual machine, and to provision the new virtual machine in a logical partitioned platform of a data processing system.

25. The data processing system of claim 24, wherein the snapshot of the master virtual machine is one of a plurality of snapshots of a plurality of master virtual machines, and wherein the processor unit further executes the computer usable program code:

to associate the new virtual machine with the snapshot of the master virtual machine, wherein the master virtual machine corresponds to a certain user class.