Flow control method and device for data migration bandwidth of solid-state hard disk

Abstract

The present invention relates to the technical field of solid-state hard disks, and provides a flow control method and device for data migration bandwidth of solid-state hard disks. The method includes: in the current flow control period, judging whether all read and write commands received by the solid-state hard disk have been completed; if Yes, according to the difference between the average migration rate of the currently saved solid-state drive for data migration and the average read-write rate of the solid-state drive for read and write operations, and the first limit bandwidth of the currently saved solid-state drive for data migration, Perform increasing processing on the first limited bandwidth; if not, perform decreasing processing on the first limited bandwidth according to the difference between the average migration rate and the average read / write rate, and the first limited bandwidth. The present invention aims to limit and dynamically adjust the bandwidth of data migration of the solid-state hard disk according to the speed requirements of the solid-state hard disk for reading and writing operations under the condition that the read-write rate is not affected by data migration, so as to realize the stability of reading and writing. In this case, the data migration is completed.

Description

technical field [0001] The invention relates to the technical field of solid-state hard disks, in particular to a flow control method and device for data migration bandwidth of solid-state hard disks. Background technique [0002] The dynamic random access memory DRAM solid-state hard disk with three-layer storage unit TLC particles as the main memory particle will set a single-layer storage unit SLC cache memory Cache of a certain size to store cached data. When the Cache block is full, Then migrate the data in the SLC to the TLC. During the data migration process, the read and write rates will be affected by the data migration. [0003] Among them, the current flow control scheme of solid-state hard drives is mainly aimed at the usage needs of consumers. In order to achieve the purpose of fast data migration, the bandwidth of data migration will not be limited. [0004] However, in the storage of video surveillance, once the read / write rate of the solid-state hard disk i...

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Problems solved by technology

[0005] The invention discloses a flow control method and device for data migration bandwidth of a solid-state hard disk, which is used to solve the problem in the prior art that the bandwidth of the solid-state hard disk is not limited during data migration, and cannot be adjusted according to the requirements of the read-write rate. The bandwidth of data migration is adjusted, resulting in unstable reading and writing rates, resulting in video loss or video freeze problems during playback

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