Picture storage method and device, picture reading method and device, and picture access system

Abstract

The invention discloses a picture storage method and device, a picture reading method and device, and a picture access system, and the picture storage method comprises the steps: receiving a picture which comprises a picture ID and picture data; generating a storage file name according to the picture ID; storing the picture data into the tail of the disk file pointed by the storage file name in anadditional form; and generating an index record including the picture ID, the storage file name and the storage position of the picture data in the disk file. The picture reading method comprises thefollowing steps: receiving a reading request which comprises a plurality of picture IDs; generating a corresponding reading file name according to each picture ID; searching the storage position of the picture data corresponding to the picture ID in the index record to generate a read record; summarizing the read records with the same read file name to generate a first read queue; sorting the plurality of read records of the first read queue according to the gradual change sequence of the storage positions in the read records to generate a second read queue; and sequentially reading the picture data according to the sequence of the reading records in the second reading queue.

Description

technical field [0001] The invention relates to the technical field of data storage, in particular to a picture storage method, reading method, device and access system. Background technique [0002] The size of the pictures acquired by the video acquisition device (camera) is usually tens of KB (=2 10 bytes) to several MB (=2 20 Bytes), the picture access system can store and read these small files, which is a typical massive small file access system. The system not only faces continuous writing of images, but also handles a large number of concurrent image query requests, which poses a great challenge to the storage and indexing capabilities of the entire system. [0003] The device for storing image data in the system is a disk. When storing / reading image data, the magnetic arm needs to drive the magnetic head to move to the specified sector in the disk for read / write operations. Each sector has a number, and adjacent Sectors are sequentially numbered. [0004] The sp...

AI Technical Summary

Problems solved by technology

But most of the time, the storage locations of image data on the disk are scattered, and the location of multiple image data concurrently requested by the client may be located in any sector of the disk. Storing / reading image data in scattered storage locations will cause disk random read / write, resulting in reduced disk read / write performance

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