Re: bcachefs with cache device and backing device

On Thu, May 12, 2016 at 06:50:26PM -0700, Martin McClure wrote:

I'm trying out bcachefs for the first time. I can follow the
instructions (format a cache device, mount it type bcache) and it works.

What I'd like to do, however, is to have an SSD cache device, and a
rotating-disk backing device, as a bcachefs filesystem. Is this
something that bcachefs can do at present? If so, what's the basic
procedure?

Yeah - tiering replaces cache/backing devices

IIRC,

bcache format --tier 0 -C <SSD> --tier 1 -C <spinning rust>

(the -C is going to go away at some point)