A file access method and system for an embedded terminal

Abstract

The invention discloses a file accessing method and system for an embedded terminal. The file accessing method includes steps of file storing, and file finding and reading, wherein the file storing includes that step 101), calculating the number of data blocks needed by the file; step 102), inquiring bitmap information, and obtaining data block groups which can meet the distribution requirement according to the number of needed data blocks; step 103), storing the file in the data block group found through the step 102); the file finding and reading include that step 201), calculating the hash value of the file name; step 202), finding an index node corresponding to the file according to the hash value and a mapping table, inquiring the information in the index node to obtain the position information of the data blocks with the file content, wherein the index node uses a plurality of segments to record the position information of the data blocks, and each segment comprises the serial number of the initial data block and the number of data blocks for continuously storing the file content; step 203) reading the needed file content in the obtained data blocks. The file accessing method for the embedded terminal is capable of meeting the file storage effectiveness, reliability, usability and expandability requirements.

Description

technical field [0001] The invention belongs to the field of network technology, and in particular relates to a file access method and system for an embedded terminal. Background technique [0002] In the application scenario of the digital media service, it is necessary to store the media data obtained from the external program source to the local disk array for data push. [0003] Which scheme to use to store and manage streaming media data is a more complicated and important issue. The traditional method is to use file systems based on general-purpose operating systems (such as Windows and Linux) for storage and management. However, both the operating system and the file system will bring a lot of resource overhead, and will also cause storage bottlenecks. This leads to a problem of how to achieve efficient data management on the premise of ensuring high reliability of data storage. This problem is to design a streamlined disk data management system that can meet the re...

AI Technical Summary

Problems solved by technology

[0004] The existing file storage technology and disk management methods cannot fully meet the above application requirements, and more appropriate methods are needed to realize the storage and management of streaming media data

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