A case for QLC SSDs in the data center

What this post added

This post introduces the exploration and adoption of Quad-Level Cell (QLC) Solid State Drives (SSDs) as a new storage tier in Meta's data centers. It highlights QLC's advantages in higher density, improved power efficiency, and better cost compared to existing TLC SSDs, positioning it as a middle ground between HDDs and TLC SSDs. The post details the hardware and software considerations for integrating QLC, including form factor challenges and adapting storage software for high-density, read-bandwidth-intensive workloads, aiming to significantly increase byte density and reduce power consumption at the server and drive level.