System and method for fast detaching virtualized disk image

Abstract

The invention discloses a system and method for fast detaching a virtualized disk image. The system comprises a partition table analysis module, a disk analysis module, a file distribution table extraction module, a partition analysis module, a conflict resolution module and a file distribution table write-in module. The partition table analysis module is used for analyzing a target partition and a virtualized disk file physical address. The disk analysis module is used for judging whether a virtualized disk file is within the range of the target partition or not based on the physical address, if not, an error is reported, quitting is carried out, and if yes, the virtualized disk file is analyzed, and a file partition table and a file distribution table are acquired; the file distribution table extraction file is used for judging whether a file in the file partition table is stored in a virtualized disk as it is or not based on the file distribution table and recording file distribution records of files capable of being directly extracted; the partition analysis module is used for analyzing the target partition to acquire the position of a target partition file distribution table; the conflict resolution module is used for comparing the file distribution records with file names in the target partition, and if the file names are identical, file distribution record file names are modified; the file distribution table write-in module is used for writing the file distribution records in the target partition based on the target partition file distribution table and deleting original files.

Description

Technical field [0001] The present invention relates to the field of computer technology, and more specifically to a system and method for rapidly splitting virtualized disk images. Background technique [0002] When a file needs to be extracted from a virtualized image, currently the operating system is used to map the virtual machine image to a disk and copy the file. This operation is completely unnecessary when the virtual machine image does not need to be retained. When extracting a small number of files from the image, the efficiency can be tolerated, but when a large number of files need to be extracted, especially when all files need to be extracted, the disassembly method mainly relies on the virtual layer to mount the image and mount the file system. The machine disk mirroring takes a long time and requires double the space, and needs to copy all the data file contents, and requires continuous random seeks, which is inefficient. Summary of the invention [0003] In orde...

AI Technical Summary

Problems solved by technology

When extracting a small number of files from the image, the efficiency is tolerable, but when a large number of files need to be extracted, especially when all files need to be extracted, the disassembly method mainly relies on the virtual layer to mount the image and mount the file system. Disk mirroring takes a long time and requires double the space, and needs to copy all data file content, and requires continuous random seeking, which is inefficient

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