Paper Title: Reaching Petabyte-Scale Systems with ZNS SSDs

Paper Abstract: The combination of QLC NAND and ZNS is helping SSDs become a viable alternative for cost-effective storage at scale. With the ZNS interface becoming more stable, ZNS SSDs are starting to be deployed, and more open-source management storage such as the lightweight PoseidonOS is becoming available. This leads to the question: How much can we increase storage density in a modern server? This talk will address how to build a petabyte-scale system with ZNS SSDs by (1) reviewing the TCO reduction in terms of NAND OP, WAF, and in terms of server maintenance, (2) present the design and implementation of Storage SW to manage and deploy these high capacities, and (3) comment on the lessons learned, and how we are bringing this knowledge back to the ZNS and PoseidonOS ecosystem.

Paper Author: Javier Gonzalez, Principal Software Engineer, Samsung Electronics

Author Bio: I lead Samsung Memory Solutions' Global Open-Source Team (GOST), where I take care of our open-source activities and manage a distributed team of highly talented engineers. This includes defining strategy, internal / external communication, and day-to-day execution. I am also the founder and site manager for Samsung Semiconductor Denmark Research (SSDR) - Samsung’s Memory Solutions first R&D center in Europe and fifth worldwide. I am a Ph.D in operating systems with a strong background in technical leadership, experimental research, and Linux Kernel development. My interests lay primarily in the hardware / software co-design space, where systems software, hardware architecture, and open-source meet. I am dedicated to defining safe environments for motivated software engineers to be creative and get things done. I am a contributor to a wide range of open source projects including the Linux Kernel. I am a regular speaker at several top industry and academic conferences.