Docs: detecting metadata changes
Jori.Mantysalo at uta.fi
Tue Feb 4 03:56:13 MST 2014
I just tested our backup system, that is done with rsync. When I changed
metadata of file --- for example permissions --- rsync notices change and
copies permissions to backup. However, our archiving does not work. So I
can roll back to older contents of a file but not to older permissions,
owner/group information etc.
Several web pages claim that rsync does not detect metadata changes at
all. See for example http://www.noah.org/wiki/rsync_notes
I think that rsync FAQ or other documentation should cover this.
Difference between mtime and ctime might not be that clear to all. Also
there could be some note about "cp -u", because it is first thing to come
in mind if somebody is setting up archiving backups.
More information about the rsync