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Keynote Speaker

Sangyeun Cho -- I/O Acceleration from the Bottom Up

In this talk, I will capture recent advances in flash solid-state drive (SSD) technologies, especially focusing on computational storage and media geometry aware interfaces. The first system to discuss is Biscuit; it is a programming model and an implementation of the same on a flash storage system. YourSQL builds on Biscuit to achieve over 15x performance gain for top five queries of TPC-H. I will also describe a device that packages a high performance FPGA and SSD together. Next, I will talk about several recent SSD interface standards, like open-channel SSD and zoned namespace. They try to circumvent the traditional LBA interface and expose the geometry of the underlying flash media. Essentially, they aim to optimize the media usage. Despite their benefits, I observe that there are challenges to users of those interfaces, requiring further progresses. Before closing, I will discuss how SSDs can better service multi-tenancy workloads through isolation concepts and how rich usage data in the SSD can reveal opportunities for more informed server infrastructure management.

Bio: Sangyeun Cho is a Senior VP Storage Software in the Memory Business of Samsung Electronics. He received the BS degree in computer engineering from Seoul National University in 1994 and the PhD degree in computer science from the University of Minnesota in 2002. In 1999, he joined the System LSI Business of Samsung Electronics and contributed to the development of Samsung's flagship embedded processor core family CalmRISC(TM). In 2004, he joined the faculty of the Computer Science Department at the University of Pittsburgh and was tenured in 2010. He joined Samsung’s Memory Business in 2012, where he is currently overseeing enterprise solid-state drive development programs. His technical interests are in the area of computer architecture and systems with particular focus on performance, power and reliability of data center storage systems. He is a fellow of IEEE.