[rdiff-backup-users] rdiff-backup --exclude-other-filesystems != rsync --one-file-system

[Bill Clarke]

this is just something i've noted in comparing rsync with rdiff-backup.

"rdiff-backup --exclude-other-filesystems" is not totally equivalent to
"rsync --one-file-system": the difference is in directories that are
mount points for other file systems.  rsync includes the directories,
but does not descend into them.  rdiff-backup does not include the
directories at all.

imo, rsync is right to include the directories, since they are
technically in the current file system, and the permissions are that of
the current file system.  (hmm, maybe not, see below)

this also makes it easier to recover a set of file systems that are
backed up separately.

[hmm, it seems i'm wrong about permissions, at least where solaris
loopback mounts are concerned: the permissions are stored (somewhere) in
the file itself (perhaps it is the permissions of the file system's root
directory).  the same goes for timestamps.  however, the very existence
of the directory is important imo.]

cheers,
/lib