Good afternoon btrfs list,
about a month ago, when testing btrfs, I could create a snapshot with
btrfs snap create and be able to drill down in the snapshot to find
subvols and files below the snapshot level. I currently need to use
btrfsctl -s to create snapshots and can no longer drill down through
subvols in them. An example would be a file tree of /btrfs (subvol)
/data (subvol) /sites (subvol) /0000 (directory) /files-in-dir. If I
snapshot /btrfs/data I can open data and see /sites but can see nothing
below /sites. However, if I snap /btrfs/data/sites I can drill down
through all lower directories and files. In my past tests I was able to
drill all the way down from the /btrfs/data snap. Also, in the past, a
snap was definitely a sparse file and was able to easily be moved, moved
back, remounted and used. Currently, the useful file /btrfs/data/sites
contains 5GB of data and both shows and moves as 5GB of data, not like a
sparse file. Am I misusing the filesystem, or improperly using the
commands? Or have changes been made to the functionality which I
missed? Sorry to take your time on such a simple matter, but I need to
understand how to best use the filesystem. Thanks very much for your
advice.
Jim Maloney
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