A method for adaptively matching nvme SSD reading speed and fiber interface speed

A technology of adaptive matching and optical fiber interface, which is applied in the direction of instruments, electrical digital data processing, etc., can solve the problem of occupying too much data cache resources, achieve the effect of reducing the demand for cache resources and saving the usage of BlockRam cache resources
CN110209613BActive Publication Date: 2022-01-25HARBIN INST OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
HARBIN INST OF TECH
Publication Date
2022-01-25

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Abstract

A method for adaptively matching NVMe SSD reading speed and optical fiber interface speed, relating to the field of data storage technology, in order to solve the problem that the NVMe SSD reading speed control method occupies more data cache resources in the FPGA in the prior art, including the following steps : First, the FPGA receives the read data packet returned from the NVMe SSD, and then pulls the RxReady signal low for five clock cycles. The present invention uses the RxReady signal of the AXI-Stream data receiving interface on the PCIe hard core to control the sending speed of the data packet when the NVMe SSD reads data, so that the NVMe SSD data reading speed matches the speed of the optical fiber data interface, without requiring a complete The read command is divided into several subcommands, and sufficient timing margin is reserved for the process of receiving and parsing data packets, which is easy to develop. Moreover, this method can reduce the demand for cache resources in the data reading process. When the logical block size of NVMe SSD is 512Byte and 4KByte, it can save 50% and 92% of the usage of Block Ram cache resources respectively, and can be widely used in data storage technology field.
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Description

technical field

[0001] The invention relates to the technical field of data storage, in particular to a method for adaptively matching the reading speed of an NVMe SSD and the speed of an optical fiber interface. Background technique

[0002] NVMe SSD is a new-generation storage device that has emerged in recent years. With the help of the high transmission speed of the PCIe bus, it can achieve a data reading speed of more than 2GB / s. NVMe SSD is small in size and low in power consumption. Together with FPGA, it can form a miniaturized and portable optical fiber data storage device. The device uses the optical fiber interface to transmit the data in the storage device to the data processing device. This X4 optical fiber interface can reach a total data transmission rate of 12.5Gbps.

[0003] When an NVMe storage device executes a read command, the speed of the fiber data interface is slower than that of the NVMe SSD. Therefore, a method must be used to match the read speed ...

Claims

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