A method for improving ssd performance and ssd

A performance and mapping table technology, applied in the SSD field, can solve problems such as overall performance degradation, achieve the effect of improving operating performance and avoiding loading

Active Publication Date: 2021-04-06
SHENZHEN YILIAN INFORMATION SYST CO LTD
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  • Claims
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Problems solved by technology

These operations will not occur in SSDs with DRAM, so the overall performance will drop greatly

Method used

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  • A method for improving ssd performance and ssd
  • A method for improving ssd performance and ssd
  • A method for improving ssd performance and ssd

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Embodiment Construction

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0027] image 3 It is a schematic diagram of the management structure after adding the mapping table cache on the host side. It is divided into 3 main parts, the host memory, SSD controller and NAND FLASH, especially for the performance improvement method of NVMe DRAMLESS SSD. With the help of NVMe HMB protocol, SSD from the host side Allocate a part of the memory space as the mapping table cache area, and record it as the HMB mapping table cache, which is used to ...

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Abstract

The invention discloses a method for improving the performance of an SSD and an SSD, which is characterized in that the SSD applies to a host for allocating a memory space as a mapping table buffer area, stores the mapping table in the mapping table buffer area, and accesses the mapping table buffer area through a high-speed interface The mapping table entry data. In view of the limitation of the mapping table of Dramless SSD, the random reading and writing of the host will frequently trigger the replacement of the internal mapping table, resulting in the problem of extremely low performance. The HMB strategy of the present invention based on NVMe SSD can be used as a mapping table cache by applying for memory on the host side , so as to avoid frequent loading and refreshing of the mapping table, thereby achieving the purpose of improving the operating performance of the SSD.

Description

technical field [0001] The invention relates to SSD control technology, in particular to a method for improving SSD performance and SSD. Background technique [0002] Due to its many advantages: high performance, low power consumption, etc., SSD is gradually replacing traditional HDD hard disk. As a system manufacturer, performance and price are important factors in evaluating products. [0003] Traditional SSDs require more DRAM caches to buffer mapping tables and data, thereby achieving high-performance read and write bandwidth. In some consumer scenarios, the requirements for read and write performance are relatively compromised, but the cost is very concerned. Therefore, along with these special needs, a series of DRAMLESSs were derived in the SATA era, that is, SSDs without external DRAM, and only a small amount of memory inside the chip completes the read and write operations. [0004] While reducing the cost, such an extremely low memory makes the SSD need to frequ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F12/02G06F12/06
CPCG06F12/0292G06F12/0646
Inventor 王猛徐伟华
Owner SHENZHEN YILIAN INFORMATION SYST CO LTD
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