Local and remote backup method for computer network data file

Abstract

The invention relates to a backup method for the local and remote data files in network information technology field. The invention backups the data using the backup data to form new backup to satisfy the customer's requirement, it can ensure the backup for all data and provide a fast 'entire backup' method; when remote backup, it just need to transmit the increased data block which is needed to form a new backup file to the remote terminal. The increase extraction method which adopts the increased backup method generates the data which is used to generate the different backup, and then uses the previous backup different data to form the new different backup. The invention overcomes the disadvantages of low velocity and large remote backup web transport those exist in the present increase backup and different backup.

Description

technical field [0001] The invention relates to a method used in the technical field of network information, in particular to a local and remote backup method of computer network data files. Background technique [0002] In the data backup / restoration system, the backup method determines when the system backs up data and what content needs to be backed up. It not only determines the system's data backup efficiency but also affects the system's efficiency in restoring backup files. [0003] According to the literature search of the prior art, Geng Yu published the article "Computer System Data Backup Mechanism and Strategy" in "Huazhong Electric Power" 2005 Vol.18 No.5, which summarizes the currently known backup methods as follows: kind: [0004] (1) Full Backup (Full Backup): The backup file contains all the archives, and the data files to be backed up are fully backed up at each backup time point, and a copy of all the data is generated each time. Its advantages: easy an...

AI Technical Summary

Problems solved by technology

Its disadvantages: it takes too long to backup, takes up a lot of storage space, and may store a lot of the same data

Its advantages: the backup time is short, the amount of data extraction is minimal, and the storage space of the backup files is saved; the disadvantages: the recovery steps are cumbersome, and each backup file depends on all the previous backups, and one file damage will cause all backup files to be backed up later. file failure

Its advantage: the backup time is short, saves the storage space of the backup file, and the recovery steps are relatively simple; the disadvantage: the differential data in each backup may contain a large amount of the same data, and the extraction of repeated data may be performed when extracting the differential data

[0008] (1) Known backup methods all rely on full backup, and for users who need to back up a large amount of data, it takes a lot of time to perform full backup frequently and often needs to suspend system work to ensure data consistency before and after backup. Cause users to be unable to use the system normally and suffer a lot of losses

[0009] (2) When the user needs to perform remote backup of data, the backup system needs to transfer the entire file of the backup data according to the known backup method. When the file is large, the backup system consumes too much network resources and causes the entire system Congestion makes the system backup efficiency extremely low, and the transmission of large amounts of data increases the probability of data loss

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