Configurable real-time transparent compressing method in file system

Abstract

The invention relates to a configurable real-time transparent compressing method in a file system, belonging to the technical field of computer data storage. In the establishment stage of a file system, corresponding compression algorithms are set for different types of files in a configuration file (compression configuration information is read in a mount stage of the file system, such as a computer memory), and a file metadata table, a data block index and a file composition table are set in an embedded database; in the using stage of a file system, an operating command initiated by application program to the file system is received and responded through drive of the file system, and the read and written data is subject to real-time transparent compression according to the configuration requirement. In the method, proper compression policies and compression algorithms for various types of files in the file system can be flexibly configured so as to effectively save memory space and avoid waste of calculation resources; and convenience of the read and write of the files cannot be affected because the compressing process of the method is transparent to the application program and users.

Description

technical field [0001] The invention relates to a configurable real-time transparent compression method in a file system, which belongs to the technical field of computer data storage. Background technique [0002] With the wide application of various digital devices, the digital data that people need to save is also increasing rapidly. Data compression technology can improve the efficiency of storage space utilization and effectively save storage resources by adopting a coding mechanism that is more suitable for the characteristics of the data to be stored and reducing the statistical redundancy in the stored data. Therefore, various data compression methods have been widely used in computer storage systems. [0003] At present, the methods for realizing data compression in computer storage systems can be mainly divided into the following two categories, and no matter what kind of methods there are obvious deficiencies. The first approach is to include data compression as...

AI Technical Summary

Problems solved by technology

For some multimedia files, such as video files encoded with MPEG-2 and audio files encoded with MP3, they have already performed lossy compression on the data in the encoding stage, and the statistics of the data in these files Redundancy has been reduced to an extremely low level, so when the lossless compression algorithm is performed on these files in the compressed file system again, it is not only difficult to effectively reduce the size of these files, but often even the compressed data is larger than The state of the data before compression

Therefore, the compression process of the compressed file system for these files that are not suitable for compression can not bring the benefits of effectively saving storage space, and considering the additional overhead of the compression process on computing resources and the negative impact on data read and write performance, now This blind compression method that does not distinguish between file types in a compressed file system is undoubtedly inappropriate and not worth the candle

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