On Thu, Dec 31, 2020 at 8:05 AM Andrei Borzenkov <[email protected]> wrote: >
> > > > OK, but then could I use Y as parent of the rw snapshot, let's call it > > W, in a send? > > No > Of course I didn't mean to use Y as a parent of W itself but to a readonly snapshot of W whenever I want to send it to the second FS. And I just tried the following steps and they worked: 1) created subvol X 2) created readonly snap Y of X 3) sent Y to second FS 4) modified X 5) created readonly snap X1 of X 6) sent -p Y X1 to second FS 7) created readwrite snap Y1 of Y 8) modified Y1 9) created readonly snap Y1_RO of Y1 10) sent -p Y Y1_RO to second FS So, as you can see, -in 6) I've used the RO snap Y of X as the parent of X1 (and X) to send X1 to the second FS -in 10) I did the opposite, Y is still used as the parent but this time I've sent the RO snap of a subvol that is a snap of Y. So it seems to work both ways
