Redis on Flash (RoF) is a feature in Redis Enterprise that uses Flash memory or solid-state drives to extend DRAM capacity, allowing for faster software performance and cost savings. RoF stores less data in DRAM, moving inactive data to the lower tier of local Flash storage, while maintaining critical data in DRAM. The multi-threaded asynchronous architecture of RoF avoids blocking between caching requests made to Flash and those made to DRAM. RoF is now available for Redis Enterprise for Kubernetes, starting with version 6.2.12, offering a cost-effective solution for customers with large datasets. To enable RoF, users need to follow specific configuration guidelines, including adding YAML files to express the configuration.