31.12.2020 21:19, john terragon пишет: > On Thu, Dec 31, 2020 at 6:28 PM Zygo Blaxell > <[email protected]> wrote: > >> >> I think your confusion is that you are thinking of these as a tree. >> There is no tree, each subvol is an equal peer in the filesystem. >> >> "send -p A B" just walks over subvol A and B and sends a diff of the >> parts of B not in A. You can pick any subvol with -p as long as it's >> read-only and present on the receiving side. Obviously it's much more >> efficient if the two subvols have a lot of shared extents (e.g. because >> B and A were both snapshots made at different times of some other subvol >> C), but this is not required. > > Can you really use ANY subvol to use with -p. Because if I > > 1) create a subvol X > 2) create a subvol W with the exact same content of X (but created > independently)
How exactly you create subvolume with the same content? There are many possible interpretations. > 3) do a RO snap X_RO of X > 4) do a RO snap W_RO of W > 5) send W_RO to the other FS Show actual command please. > 6) send -p W_RO X_RO to the other FS > Again show full command please. Which include also receive command. > I get this: > > At subvol X_RO > At snapshot X_RO > ERROR: chown o257-1648413-0 failed: No such file or directory > You get where? On source, on destination? > any idea? >
