[CentOS] evaluating backup systems: rsync
stuartb at 4gh.net
Thu Jan 24 06:53:56 UTC 2013
On Fri, 18 Jan 2013 at 08:07 -0000, SilverTip257 wrote:
> If you change a directory name, rsync has no way of knowing that you
> moved it. And since the new directory doesn't exist on the rsync
> source that new directory is removed and those items are rsynced
> Bottom-line: Change things on the source and don't fiddle with them
> on the destination. Or if you really want to eliminate that data
> being transferred, I suppose you could do the extra work and rename
> the directory at the same time on the source and destination. Not
> ideal in the least.
I use a home grown rsync based backup process (for 15+ years).
When traveling or otherwise worried about large directory tree
renames, I will sometimes do a 'cp -rpl' instead of a rename. This
will allow rsync to notice the new hard links and it just create the
new directory structure without transferring the data again. After
the rsync is complete I can then remove the original directory tree
and rsync again. The rsync needs to use --hard-links for this to
I only recommend doing this if you understand and are comfortable with
hard links and rsync.
I've never been lost; I was once bewildered for three days, but never lost!
-- Daniel Boone
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