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Method for improving performance of SSD (Solid State Disk), 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: 2018-05-11
SHENZHEN YILIAN INFORMATION SYST CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • Method for improving performance of SSD (Solid State Disk), and SSD
  • Method for improving performance of SSD (Solid State Disk), and SSD
  • Method for improving performance of SSD (Solid State Disk), 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 (Solid State Disk), and the SSD. The method is characterized in that one memory space is applied and distributed to a host sidefrom the SSD to serve as a mapping table buffer region, a mapping table is stored in the mapping table buffer region, and the mapping table item data of the mapping table buffer region is accessed through a high-speed interface. By aiming the problem of low performance caused in that the mapping table of a Dramless SSD is limited and a host randomly reads and writes to frequently trigger internalmapping table replace, on the basis of the HMB (Host Memory Buffer) strategy of an NVMe (Non-Volatile Memory express) SSD, the Memory of the host side is applied to serve as mapping table buffer, a situation that the mapping table is frequently loaded and refreshed is avoided, and therefore, a purpose that performance for operating the SSD is improved is realized.

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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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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