> > The think that most closely resembles the HFS catalog isn't shared amongst > volumes.
But it is. There is one btree for all volumes in a container (well, technically, there are two btrees, one for the IDs and one for the actual file catalog, but both are shared over all vols). > clonefile(2) has the same restriction as link(2) and rename(2), it has to > be done within the same volume/mounted filesystem. > So that's an API restriction, but not a technically necessary one on APFS, IMO. I guess APFS was created with iOS in mind, where we do not have multiple volumes, so no one gave this a second thought. It's a shame, as it could have some great savings when sharing volumes in some situations like the one I described. Still, it's a niche, and so I'm not hopeful this will get improved. Sigh. Thomas
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