FairyWREN - A Sustainable Cache for Emerging Write-Read-Erase Flash Interfaces

Explore a groundbreaking conference talk from OSDI '24 that introduces FairyWREN, an innovative sustainable cache designed for emerging Write-Read-Erase Flash Interfaces (WREN). Delve into the critical challenge of reducing embodied carbon emissions in datacenters, particularly focusing on flash storage which accounts for 40% of embodied carbon in servers. Discover how FairyWREN addresses the limitations of flash's write endurance and the drawbacks of the legacy Logical Block-Addressable Device (LBAD) interface. Learn about the advantages of WREN interfaces and how FairyWREN leverages them to co-design caching policies and flash garbage collection. Understand the significant improvements achieved by FairyWREN, including a 12.5× write reduction compared to state-of-the-art LBAD caches, resulting in a 35% decrease in flash cost and a 33% reduction in carbon emissions. Gain insights from researchers at Carnegie Mellon University, UNC Chapel Hill, Microsoft Azure, and the University of Washington as they present their findings in this 14-minute talk, showcasing a promising solution for sustainable and efficient flash storage in modern datacenters.