Isn't bcache that thing you're looking for?
RAM is always used first for caching, so it's a given.
bcache is just the block level caching, with a different filesystem running on top of it. There's bcachefs. I'm using it on a computer exactly for this purpose.
alt Hacker News
bcache is just the block level caching, with a different filesystem running on top of it. There's bcachefs. I'm using it on a computer exactly for this purpose.