Depending on exactly what you're doing, ZFS (and probably btrfs?) provide at least the Consistency & Durability of ACID, and maybe Isolation as well. But yes, i

Depending on exactly what you're doing, ZFS (and probably btrfs?) provide at least the Consistency & Durability of ACID, and maybe Isolation as well. But yes, it seems like it would be relatively straightforward to build Atomicity guarantees on top of a COW-based filesystem. I guess it's unlikely that Oracle would add that to ZFS now though - they don't tend to like discouraging the use of relational databases!