Storage method for improving reliability of real-time image recording system

Abstract

The invention provides a storage method for improving the reliability of a real-time image recording system. The storage method comprises the following steps: establishing a memory cache region, a read cache region thread, a write cache region thread, a read cache thread synchronization identifier and a write cache thread synchronization identifier when the real-time image recording system is started; receiving data required to be recorded by the cache region writing thread; writing the data into the cache region by the cache region writing thread, and updating the cache region writing threadsynchronization identifier; after recording is started, enabling the cache region reading thread to query the thread synchronization identifier to judge whether the thread synchronization identifier can be read or not; judging the position of the read data in the cache region; enabling the cache region reading thread to read out the data in the cache region and write the data into a disk; and simultaneously running the cache region reading thread and the cache region writing thread in the recording process until the recording is finished. According to the method, the problem of unreliability caused by switching of a plurality of threads in a plurality of cache intervals is avoided by adopting a method of establishing a circular cache region and synchronizing read-write caches; and the problem of unreliability caused when multiple threads are written into the disk at the same time is avoided.

Description

technical field [0001] The invention belongs to the field of image storage, especially real-time image storage. In particular, it relates to a storage method for improving the reliability of a real-time image recording system. Background technique [0002] At present, in order to ensure the real-time performance of the recording, the real-time image recording system basically adopts the establishment of multiple ping-pong buffer areas, uses multiple threads to switch and access these buffers, and simultaneously uses multiple threads to simultaneously write to the storage method of the hard disk. Using multiple threads to switch and access multiple cache areas leads to problems such as complex thread operations, cache access conflicts, and data errors. Using multiple threads to write to disks leads to hard disk access conflicts, data is prone to packet loss, and out-of-order problems. At present, in order to solve the above problems, the real-time image recording system desi...

AI Technical Summary

Problems solved by technology

Using multiple threads to switch and access multiple cache areas leads to complex thread operations, cache access conflicts, and data error-prone, etc. Using multiple threads to write to the disk leads to hard disk access conflicts, data is easy to lose packets, and out of order, etc.

At present, in order to solve the above problems, the real-time image recording system designs a storage bandwidth much larger than the actual data storage bandwidth, which is usually more than twice. For example, when 2GB / s data needs to be stored, it is necessary to design a 4GB / s hard disk bandwidth. Brings a big cost increase

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