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Method and system for determining changes made to a source file to transmit to a target location

A target location, file system technique, applied in the domain of determining changes made to source files for transfer to the target location and system, which can address high costs

Inactive Publication Date: 2007-01-31
IBM CN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This system only needs to transfer the changed data, not the whole file, but needs to install a separate agent
Furthermore, the computation of the checksum is computationally very expensive

Method used

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  • Method and system for determining changes made to a source file to transmit to a target location
  • Method and system for determining changes made to a source file to transmit to a target location
  • Method and system for determining changes made to a source file to transmit to a target location

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Embodiment Construction

[0011] Figure 1 illustrates a computing environment in which embodiments are implemented. The computer 2 includes a processor 4 and a memory 6 consisting of one or more storage devices, including programs and codes executed by the processor 4 . The backup program 8 carried out in the memory 6 transfers the source directory and the file 10 in the source file system 12 in the source memory 14 to the target directory and file 10 in the target file system 18 in the target memory 20 that has copied the source directory and the file 10 file 16. In one embodiment, the target directory 16 may include a delta file 17b that represents the differences between the modified source file and the base copy 25, so as to contribute to the corresponding target file of the source file for which the delta file 17a was generated. Applying the changes represented in the delta file 17b includes the modified source file. Target store 20 may maintain multiple delta files 17b for a single target file ...

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PUM

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Abstract

Provided are a method, system, and program for determining changes made to a source file to transmit to a target location providing a mirror copy of the source file. An operation to modify a source file at a source location is detected, wherein a target file at a target location includes a copy of a version of the source file. A base copy of the source file is created. The operation to modify the source file after creating the base copy is executed. Differences are determined between the source file and the base copy of the file. The determined differences are transmitted to the target location, wherein an aggregation of the target file and the transmitted determined differences comprises the modified source file.

Description

technical field [0001] The present invention relates to methods, systems and programs for determining changes made to a source file to be applied for transfer to a target location that provides a mirror copy of the source file. Background technique [0002] A backup program backs up data on a computer system to a backup storage device, which may include local storage or remote storage. In some backup environments, backup agents are installed on the source and target systems. To determine whether changes need to be applied to the target file, the source and target backup agents each calculate checksum codes for segments of the file and exchange checksum codes. If the different file sections have different checksum codes, then the data in the source file identified by the different checksum codes as having different data than the target needs to be transferred to the target backup agent for application to the target file. This system only needs to transfer the changed data, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F11/14G06F17/30
CPCG06F11/1451
Inventor 克里斯托弗·约汉·斯塔库蒂斯凯文·迈克尔·斯蒂尔恩斯
Owner IBM CN