Method for quickly merging backup points in data deduplication system

Abstract

The invention discloses a method for quickly merging backup points in a data deduplication system. The method comprises the following steps that: 1, a data backup application starts a backup point merging task module in a data deduplication system; 2, the backup point merging task module receives an instruction and obtains a source backup and a target backup which need to be subjected to content merging; 3, the backup point merging task module detects whether data blocks with the same content exist in the source backup and the target backup or whether data blocks needing to be updated and replaced by the target backup exist in the source backup; and if yes, the index entries corresponding to the data blocks meeting the conditions in the source backup and the index entries corresponding to the data blocks meeting the conditions in the target backup file are exchanged; and 4, the backup point merging task module marks and deletes the exchanged indexes in the source backup, the reference corresponding to the indexes and the data blocks. The problem that a data block must be transmitted to the application from the data deduplication system and then returned to the data deduplication system is solved. And meanwhile, the bandwidth can be reduced in a cloud scene.

Description

technical field [0001] The invention relates to the technical field of data storage, in particular to a method for quickly merging backup points in a data deduplication system. Background technique [0002] A typical data deduplication system saves the source data of a backup session as three types of files, namely index files, reference files, and data files. Data files are used to save data blocks, and reference files are used to record the metadata of these data blocks. Therefore, each data file must have one and only one corresponding reference file. Index files, on the other hand, are considered representations of the source data, they do not contain real data, but they can tell where the real data can be found by pointing to reference files. Obviously, entries in the index file can point to multiple reference files, so that subsequent backups can refer to the backed up data blocks, thereby achieving deduplication (see figure 1 ). [0003] Suppose backup 2 has 3 uni...

AI Technical Summary

Problems solved by technology

[0010] Aiming at the deficiencies in the prior art, the present invention provides a method for fast backup point merging in a deduplication system, which solves the main drawback of the backup point merging in the above-mentioned traditional deduplication system: data blocks must be merged from the deduplication system to the application and back to the deduplication system

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