On February 3, 2010 6:02:52 PM +0100 Jens Elkner
<jel+...@cs.uni-magdeburg.de> wrote:
On Wed, Feb 03, 2010 at 10:29:18AM -0500, Frank Cusack wrote:
# newer files
find /file/system -newer /file/system/.zfs/snapshot/snapname -type f
# deleted files
cd /file/system/.zfs/snapshot/snapname
find . -type f -exec "test -f /file/system/{} || echo {}" \;
The above requires GNU find (for -newer), and obviously it only finds
files. If you need symlinks or directory names modify as appropriate.
The above is also obviously to compare a snapshot to the current
filesystem. To compare two snapshots make the obvious modifications.
Perhaps http://iws.cs.uni-magdeburg.de/~elkner/ddiff/ wrt. dir2dir cmp
may help as well (should be faster).
If you don't need to know about deleted files, it wouldn't be. It's hard
to be faster than walking through a single directory tree if ddiff has to
walk through 2 directory trees.
If you do need to know about deleted files, the find method still may
be faster depending on how ddiff determines whether or not to do a
file diff. The docs don't explain the heuristics so I wouldn't want
to guess on that.
-frank
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