Flash memory card data storage method based on multiple data streams, flash memory card and equipment

Abstract

The invention discloses a flash memory card data storage method based on multiple data streams, a flash memory card and equipment, and relates to the technical field of data storage. The method is characterized by comprising the following steps: establishing a data flow table entry, wherein the data flow table entry comprises an initial logic address and a data flow length; dividing a storage areain the flash memory into a continuous storage area and a discontinuous storage area; sequentially obtaining to-be-written data streams, and writing the initial logic addresses and the data lengths ofthe data in the to-be-written data streams into the data stream table entries; judging whether the to-be-written data is continuous data or not based on the initial logic address and the data flow length in the data flow table item; if the to-be-written data is continuous data, allocating a physical address of the to-be-written data to a continuous storage area; and if the to-be-written data is not the continuous data, allocating the physical address of the to-be-written data to the discontinuous storage area. The method has the advantages that the garbage collection amount of the flash memory card is reduced, and the service life of the flash memory card is prolonged.

Description

Technical field [0001] The present invention relates to the technical field of data storage, and more specifically, it relates to a flash memory card data storage method, flash memory card and equipment based on multiple data streams. Background technique [0002] Driving recorders and IPC (network cameras) generally use SD-based flash memory cards such as TF cards for data storage. When data recording is performed on a dash cam or IPC, multiple data streams (such as video data stream, log data stream and command data stream) will be generated, and multiple data streams are written in serial, so when data is written When it reaches the flash memory, in addition to the video data, there are log data and command data on the same flash block. Log data and command data are generally hot data, but video data are generally cold data. Because TF card equipment basically does not use Trim , Will cause the data in a storage block to be discontinuous, thereby increasing the amount of garb...

AI Technical Summary

Problems solved by technology

However, when the driving recorder or IPC performs data recording, multiple data streams (such as video data streams, log data streams, and command data streams) will be generated, and multiple data streams are written serially, so when data is written When entering the flash memory, besides the video data, there are also log data and command data on the same flash memory block; log data and command data are generally hot data, but video data is generally cold data, because TF card devices basically do not use Trim , will result in discontinuous data in a storage block, thus increasing the amount of garbage collection

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