[Mayzie]

> I don't know if this exists or not, but I'd like to try something like a fuse filesystem which can transparently copy a file to a fast scratch SSD when it is first accessed.

You may be interested in checking out bcache[1] or bcachefs[2].

[1] https://www.kernel.org/doc/html/latest/admin-guide/bcache.ht...

[2] https://bcachefs.org/

[theblazehen]

lvm-cache works as well, if you're already using LVM.

https://github.com/45Drives/autotier is exactly what they were asking for as well

[magicalhippo]

I've done some testing with using ZFS on top of LVM with dm-writecache.

Worked well enough on the small scale, but sadly haven't had the time or hardware to test it in a more production-like environment.

Also, it was starting to feel a bit like a Jenga tower, increasing the chances of bugs and other weird issues to strike.

[hamandcheese]

My assumption with bcache is that it operates on blocks rather than entire files. Am I wrong?

[LtdJorge]

Yeah, bcache is exactly that