sdf:software-defined Flash for Web-scale Internet Storage System

A. Reference

http://www.csdn.net/article/a/2013-12-18/309280

http://gtstorageworld.blog.51cto.com/908359/1269024

Http://www.searchstorage.com.cn/microsites/2014sds/index.html

Http://www.baike.com/wiki/%E8%BD%AF%E4%BB%B6%E5%AE%9A%E4%B9%89%E9%97%AA%E5%AD%98

1. Its core innovation is "software Defined" (software definition): Hardware flash channel to software exposure, through the system to solve the hardware complexity and uncertainty, so that the software can take full advantage of the potential of hardware, making hardware easier.

As we all know, the traditional SSD has some shortcomings, such as the actual performance of only about 50% of theoretical performance, 20%~50% redundant space can not be used, which caused a huge cost of hardware waste, virtually also improve the operation and maintenance costs. As SSDs are widely used, these cost-wasting issues are becoming increasingly apparent.

Faced with this situation, Lin Shi-ding put forward the innovative concept of software-defined flash two years ago and started related projects. Today, Baidu has developed its own SSD and successfully launched it internally. Compared to the mainstream PCIe Flash card on the market, Baidu self-research SSD performance increased twice times (at the same cost), the cost per GB decreased 40%~50%, compared to the traditional SATA SSD, performance increased 5 times times, cost per GB flat. The paper, which was included in the Asplos, originated from this project.

2.