Layered Virtual File System

• US 20110040812A1
• Filed: 08/17/2010
• Published: 02/17/2011
• Est. Priority Date: 12/20/2007
• Status: Abandoned Application

• Current Assignee: Virtual Computer Incorporated (Cloud Software Group)
• Original Assignee: Virtual Computer Incorporated (Cloud Software Group)
• Inventors: Phillips, Robert
• Application Number:
  US12/858,059
• Publication Number:
  US 20110040812A1
• Time in Patent Office: Days
• US Class Current: 707/822
• CPC Class Codes: G06F 9/45541 Bare-metal, i.e. hypervisor runs directly on hardware

Abstract

A virtual workspace can include an active instance of a layered virtual file system namespace. A layered virtual file system namespace is referred to by the virtual workspace and includes a collection of system data (e.g. layered virtual file system base layer), user data (e.g. layered virtual file system user layer), and virtualized applications (e.g. virtual app layer), metadata and policies (e.g. layered virtual file system layer scope). Because a virtual workspace can include software such as an operating system and one or more applications in addition to user data, a virtual workspace can be aligned with a namespace so that an operating system of the virtual workspace may be located at a “base layer”, one or more applications executing on the operating system may be located at an upper “virtual app” layer, and user data in a virtual workspace may be found at any layer at or above the user layer.

Claims

1. A method of providing a virtualized workspace for a computing facility, the method comprising:

configuring a physical workspace of the computing facility into a plurality of virtual layers, wherein the plurality of virtual layers include at least one of a base layer and a user layer, and where the base layer is configured as the bottom most layer of the plurality of virtual layers;

providing each of the plurality of virtual layers with its own file system hierarchy;

overlaying the file system hierarchy of each of the plurality of virtual layers such that a file system hierarchy in a first virtual layer is configured above a file system hierarchy in a second virtual layer and has priority; and

merging the plurality of virtual layers to provide a merged view file system to a user of the computing facility such that the presence of the plurality of virtual layers and overlaid prioritized file system hierarchy is transparent to the user.

2. The method of claim 1, further including enabling the creation of additional virtual layers.

5. The method of claim 2, wherein the creation of an addition virtual layer is to partition the contents of the additional virtual layer from existing virtual layers.

6. The method of claim 5, wherein the partitioning protects the existing virtual layers from the additional virtual layer.

7. The method of claim 5, wherein the partitioning improves the ease with which the contents of the additional virtual layer are deleted.

9. The method of claim 2, wherein the additional virtual layer is a virtual application layer.

10. The method of claim 9, wherein the virtual application layer is created when the application is installed on the computing facility.

11. The method of claim 9, wherein the virtual application layer is subsequently merged into an existing virtual layer.

14. The method of claim 1, wherein the physical workspace is a data storage facility of the computing facility.

15. The method of claim 1, wherein the base layer includes an operating system for the computing facility.

16. The method of claim 1, wherein the base layer includes applications installed by an administrator.

17. The method of claim 1, wherein the base layer includes utilities installed by an administrator.

23. The method of claim 1, wherein a virtual layer is frozen.

30. The method of claim 1, wherein the system hierarchy of a virtual layer includes at least one file.

31. The method of claim 30, wherein deleting a file results in the file being deleted when the file data that is visible in the merged view resides in the virtual layer.

32. The method of claim 30, wherein a file is logically deleted when the file exists within the virtualized workspace but is not visible to the user in the merged view.

33. The method of claim 30, wherein a file is obscured such that the user cannot see a file in a lower layer if there is a deleted file with the same name in a higher layer.

3-4. -4. (canceled)

8. (canceled)

12-13. -13. (canceled)

18-22. -22. (canceled)

24-29. -29. (canceled)

34-35. -35. (canceled)

36. The method of claim 1, wherein priority allows for files in the first virtual layer to have priority over files with the same path name in the second virtual layer.

36-42. -42. (canceled)

43. A method of providing access to files in a virtual file system for a computing facility, the method comprising:

providing each of a plurality of virtual layers with its own file system hierarchy, wherein the file system hierarchy of a first virtual layer has priority over the file system hierarchy of a second virtual layer; and

merging the plurality of virtual layers to provide access to files in a merged-view that contains a file system hierarchy that comprises files from each of the plurality of virtual layers based on the priority of each of the plurality of virtual layers.

44. The method of claim 43, wherein only one of identically named files in each of the first and second virtual layers will be accessible in the merged view.

45-47. -47. (canceled)