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Method, system and device for multi-channel data processing on storage device

A storage channel and data processing technology, applied in the computer field, can solve the problems of not fully utilizing hardware resources, write amplification, etc., achieve the best read and write performance, and avoid the effect of storage pressure

Active Publication Date: 2011-12-28
BEIJING BAIDU NETCOM SCI & TECH CO LTD
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] If the concurrency granularity of the storage controller is too small, the storage controller needs to maintain a very large logical address to physical address mapping table, and it is easy to cause write amplification; if the concurrency granularity of the storage controller is too large, it cannot fully Take advantage of the resources provided by the hardware

Method used

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  • Method, system and device for multi-channel data processing on storage device

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Embodiment Construction

[0074] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0075] figure 2 The hardware architecture diagram of the system provided for the embodiment of the present invention, such as figure 1 As shown, in the hardware architecture of the system, each channel pair has an independent storage controller, which is responsible for the data distribution and data processing of the flash chip in the channel, where the data processing includes: data reading, writing or erasing, etc. . The scheduling between the channels is controlled by the driver and read-write management device in the CPU through software, that is to say, the driver and read-write management device provides an application management program interface (API) for the processing of data reading, writing and erasing of each channel. ), the sched...

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Abstract

The present invention provides a method, system and device for multi-channel data processing on a storage device, wherein the system includes: a drive and a read-write management device, and more than one storage controller, wherein each storage channel has an independent storage The controller; the drive and read-write management device is used to receive the access requests provided by each thread, schedule the received access requests and send them to the storage controller responsible for the storage channel of the corresponding thread, wherein each thread is responsible for One or more storage channels; the storage controller is configured to perform data processing corresponding to the received access request according to the mapping relationship between the logical address and the physical address in the storage channel. The invention can make the concurrent scheduling between multiple channels determined by the upper-layer software, which is more suitable for the requirements of the application layer and achieves the best reading and writing performance.

Description

【Technical field】 [0001] The invention relates to the field of computer technology, in particular to a method, system and device for multi-channel data processing on storage devices. 【Background technique】 [0002] With the widespread use of semiconductor medium storage devices, various storage devices and storage media appear, such as solid state disks (SSD, Solid State Disk) and flash memory (flash) cards. An SSD or a flash card is composed of multiple flash chips. Each flash chip or a group of flash chips can form a storage channel. The storage controller improves the overall performance by concurrently reading and writing between storage channels (hereinafter referred to as channels). ,Such as figure 1 As shown, the software driver layer only provides a unified access interface for the upper-layer software, and the scheduling of data among multiple channels is determined by the storage controller. But for the upper-layer software, each channel cannot be seen, that is t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F13/16G06F13/12
Inventor 林仕鼎欧阳剑刘斌王勇
Owner BEIJING BAIDU NETCOM SCI & TECH CO LTD
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