Method to virtualize large files in a sandbox

a virtualization and large file technology, applied in the field of virtualization large file in a sandbox, can solve the problems of downgrading achieve the effects of reducing the overall performance of the sandbox, reducing the duplication of data, and facilitating the use of virtualization

Inactive Publication Date: 2017-03-23
COMODO SECURITY SOLUTIONS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0005]The invention method eliminates duplication of data on shadow file and makes virtualization more effective. There is no need to copy an entire file when the file is modified, which is time-consuming and downgrades overall performance of the sandbox. Also, it does not require duplicating file on a disk which wastes a user's disk storage.

Problems solved by technology

There is no need to copy an entire file when the file is modified, which is time-consuming and downgrades overall performance of the sandbox.

Method used

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  • Method to virtualize large files in a sandbox
  • Method to virtualize large files in a sandbox
  • Method to virtualize large files in a sandbox

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Embodiment Construction

[0014]The present invention discloses the method of large file Virtualization in sandbox. The new method according to the present invention divides large file into pieces clusters by fixed byte counts, building a mapping relationship between logical view of sandboxed file and physical shadow file on disk.

[0015]The invention is not restricted to the details of the foregoing embodiments. The invention extends to any novel one, or any novel combination, of the features disclosed in this specification (including any accompanying claims, abstract and drawings), or to any novel one, or any novel combination, of the steps of any method or process so disclosed.

[0016]In FIG. 1 the sandbox process, running on a computer device 2, is accessing file system 4; the modification of file data 6 is recorded by a bitmap 8, and only modified part of the file 10 is redirected in sandbox 12. Bitmap 8 contains filesize or clustersize bits 14. Every bit 14 in bitmap 8 represents the redirect relationship ...

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Abstract

There is provided a method and system with an improved bitmap access control method of file virtualization for large files in sandbox. The process divides a large file to pieces clusters by fixed byte counts, building a mapping relationship between logical view of sandboxed file and physical shadow file on disk. Thus, there is no need to copy an entire file when a file is modified and waste the user's disk storage.

Description

BACKGROUND[0001]File virtualization is a very important part of sandbox process. Common sandbox methods usually create a shadow file to redirect file access in the sandbox. Through the shadow file method, a sandbox could build a separated environment from existing file system data. All access and operations on file in a sandbox are redirected to shadow files, thus does not change status and content of outside files.[0002]Though the shadow file method has a problem about big and large file virtualization. Existing methods create shadow file once upon write operation happens in sandbox. It copies entire file to redirected location as shadow file. After creating shadow file, all access and modifications are redirected to shadow file. Even a single byte change in a large file results in a copy operation of entire file.[0003]In view of the forgoing, there is a need for a method and system that would provide more effective approach to file virtualization by saving time and disk storage re...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): G06F17/30H04L29/06
CPCG06F17/30914G06F17/30598H04L63/10G06F16/174G06F9/44
Inventor TAS, EGEMEN
Owner COMODO SECURITY SOLUTIONS
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