Method and system for merging image files

Abstract

The invention discloses a mirror image file merging method and a system thereof. The steps of the merging method include: performing an XOR operation on a first mirror image file and a second mirror image file to obtain a third mirror image file, and the third mirror image file includes all zero data; according to The length of the all-zero data forms a data segment; generates a random identifier; combines the random identifier and the data segment to obtain combined data, and replaces the all-zero data of the third image file with the combined data, and the third image file forms the first Four image files; the second storage device carries out inverse transformation to the fourth image file, and the fourth image file forms the third image file; the first image file stored in the second storage device and the third image file are XORed to obtain the second image file mirror file. The invention enables the volume of the updated image data to be greatly reduced in the transmission process, speeds up the data transmission to reduce the data transmission time, and does not occupy a large amount of bandwidth resources.

Description

technical field [0001] The invention relates to the technical field of data storage, in particular to a method for merging image files and a system thereof. Background technique [0002] In the cloud computing scenario, the problem of updating the image file is often encountered. For processing the new version of the image file, the traditional method is to directly transfer the new version of the image file to the target device to replace the old image file; and this method There is a disadvantage: the size of image files is generally relatively large, and transferring image files requires a lot of bandwidth and time, and both bandwidth and time are relatively precious in actual cloud computing scenarios. [0003] In fact, the difference data before and after the image file updated in cloud computing is relatively small compared with the image itself, so there should be a method for differential transmission in this case. [0004] The existing technology for differential f...

AI Technical Summary

Problems solved by technology

[0004] The existing technology for differential file transfer is realized by making a diff file to identify and record the differences between the two files, and then merging the old image file and diff to generate a new image file. File identification has high requirements, and the corresponding inverse transformation process cannot be performed. It is inconvenient to use in cloud computing mirror update and rollback scenarios

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