Method and system for video file preservation and data recovery of digital hard disk video recorder

Abstract

The invention relates to security fields and discloses a method of video recording document storage and data recovery of a digital hard-disc video recorder and a system thereof. A data document area and a summary information area are pre-arranged on a hard disc, the data document area comprises a plurality of pre-established data documents, each data document comprises index information and video recording data, and the summary information area comprises at least one B+ tree. The index information of the data documents is dispersed by means of abrasive balance characteristics of B+ tree structure operation so as to reduce the rate of hard-disc faults, eliminate hotspot areas, guarantee completeness and order of all the data documents and summary information of the video recording documents in the B+ tree of the summary information area, and accordingly ensure correctness of the video recording documents of the digital hard-disc video recorder and provide a recovery method of complete data. The system can not be broken down by single-point faults.

Description

technical field [0001] The invention relates to the security field, in particular to the storage and recovery technology of audio and video files in a digital hard disk video recorder. Background technique [0002] Digital Video Recorder (Digital Video Recorder, referred to as "DVR") is a set of computer systems for image storage and processing. It has the functions of long-term video recording, recording, remote monitoring and control of images or voices. Video storage technology has become a hot topic. [0003] The Chinese patent application number 200510050829.3 proposes a digital video recorder file management method that prevents file fragmentation. It pre-allocates files of a fixed size on the hard disk so that the same file can be continuous on the physical hard disk, effectively preventing the hard disk from Fragments are generated, and these pre-allocated files and video information are centrally managed through an index file. [0004] The inventors of the present...

AI Technical Summary

Problems solved by technology

[0004] The inventors of the present invention found that the disadvantage of this solution is that all information is managed through index files, and the operation and writing of the hard disk needs to read and write the index, so the area where the index file is located becomes the hotspot area of ​​the entire system. Once it is destroyed, the entire file The management method will not be able to continue

On the other hand, hotspot areas may become the bottleneck of the overall system performance

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