The Btrfs inode-number epic (part 2: solutions)

It's hard to make a direct comparison given the fundamental differences in the model of subvolumes vs ZFS' various dataset types, but FWIW, I have a running system - at home, so not exactly enterprise scale - where the total number of ZFS snapshots that have been made across filesystems/volumes in the pool over the last decade is probably around 15 million. Getting pretty close to 24 bits.

I don't know enough about btrfs to know if the equivalent setup to those filesystems and volumes would be based on some shared root there and competing for inodes, or entirely separate. I guess what that boils down to is that I don't know if the rough equivalent to a btrfs filesystem is a ZFS filesystem or a ZFS *pool*. Either way, once you're used to nearly-free snapshots, you can find yourself using a *lot* of them.