9/10 – revolutionary but hardware-gated. Note: As of April 2026, check for commercial implementations like "PrimoCache 5" or "Intel VROC 4.0" that may incorporate similar features under different names.
For early adopters with persistent memory hardware, Ramcache 3 closes the last remaining gap between DRAM speed and storage safety. For everyone else, it offers a glimpse of a future where “save your work before shutdown” becomes an obsolete phrase. ramcache 3
Will it replace ZFS ARC or L2ARC? No – those are filesystem-level caches. Ramcache 3 operates below the filesystem, caching entire block devices. It is a complementary technology. 9/10 – revolutionary but hardware-gated
