High-definition media-oriented embedded file storage structure and method

Abstract

The invention discloses a high-definition media-oriented embedded file storage structure and method. The storage structure comprises a label domain, a wafer unit indexing domain, a directory indexing domain, a data domain and a temporary switching domain, wherein the label domain is used for recording attribute information of a file system per se; the wafer unit indexing domain is used for indexing a minimum data unit in the file system and establishing a mapping relation with the data domain; the directory indexing domain is used for recording the attribute information of detailed files or directories; the data domain is used for storing corresponding actual data of the files and carrying out indexing management through the wafer unit indexing domain in the using process; and the temporary switching domain is used for storing certain temporary data which is generated for assisting search of a memory. Storage organization and management of files in an embedded system is realized by utilizing interaction relationship among the five domains. The high-definition media-oriented embedded file storage structure and method disclosed by the invention have the advantages of providing a storage structure with metadata and actual data separation and being capable of improving the stability and the reading-writing efficiency of the file system.

Description

technical field [0001] The invention relates to the technical field of embedded file systems, in particular to an embedded file storage structure and storage method for high-definition media files. Background technique [0002] With the arrival of the media industry into the high-definition era, coupled with the application of data storage technology brought about by high-definition and the application background of embedded platforms supported by embedded systems, the use of existing embedded storage technology to store high-definition media The files exposed many problems, such as the easy loss of files, the easy crash of the system, the unrecoverable operation and data, and the playback freeze caused by limited I / O performance. [0003] At present, the file systems used in embedded systems include ext2, ext3 and ReiserFS. These file systems have their own advantages. However, due to the limited resources of the embedded system and the vulnerability to external factors, th...

AI Technical Summary

Problems solved by technology

However, when the file system is abnormal in read and write operations, the loss rate of ext2 files and the damage rate of the file system are very high.

Although the ext2 file system includes a system consistency detection module and a repair module e2fsck, e2fsck needs to perform a comprehensive scan of the file system when an error occurs, and the time complexity and space complexity increase linearly with the amount of data

Therefore, it is not suitable for embedded storage systems that have limited resources, are easily affected by the external environment, and require high operating efficiency.

[0005] The ext3 file system adds a log mechanism on the basis of being compatible with ext2, but after its test on the embedded system, it is found that due to the log mechanism, packet processing method, data block recovery and other mechanisms, the embedded system that is vulnerable to the external environment is not Not applicable, so the reliability of its storage system is still not guaranteed

[0006] Compared with ext2, the performance of ReiserFS has been greatly improved, and it also includes a log mechanism. However, some directory operations of ReiserFS are not synchronized, which may cause data damage to some applications that rely heavily on the file lock mechanism.

In addition, ReiserFS does not have a disk defragmentation program, and the disk must be formatted every time a version is upgraded.

[0007] Therefore, in response to the above problems, there is currently no complete, comprehensive, and applicable storage solution for embedded media data storage that can improve performance, especially for data storage organization solutions for high-definition media files with large amounts of data

Images