On 13-Nov-2008, at 14:17, Daniel Jarboe wrote:
I'm currently using rsync and --link-dest to give me something like a
poor-man's incremental snapshot to disk. But I really only want to
generate
a new backup if rsync detects differences, otherwise I don't need a
new
backup.
But with link-dest you are not creating a new backup; you are only
creating new LINKS to the same backup.
If the new backup has no changes from the last backup, it takes up no
space, so why does it matter? You simply expire your old backup off
automatically with a rotate script.
Here's what my backup folder looks like:
2 drwxr-xr-x 23 root wheel 1024 Nov 14 00:54 serv1.daily.0
2 drwxr-xr-x 23 root wheel 1024 Nov 13 01:05 serv1.daily.1
2 drwxr-xr-x 23 root wheel 1024 Nov 12 00:57 serv1.daily.2
2 drwxr-xr-x 23 root wheel 1024 Nov 11 00:58 serv1.daily.3
2 drwxr-xr-x 23 root wheel 1024 Nov 10 00:58 serv1.daily.4
2 drwxr-xr-x 23 root wheel 1024 Nov 9 00:55 serv1.daily.5
2 drwxr-xr-x 23 root wheel 1024 Nov 8 00:56 serv1.daily.6
2 drwxr-xr-x 24 root wheel 1024 Oct 1 00:21 serv1.monthly.0
2 drwxr-xr-x 24 root wheel 1024 Sep 1 00:22 serv1.monthly.1
2 drwxr-xr-x 24 root wheel 1024 Aug 1 00:22 serv1.monthly.2
2 drwxr-xr-x 24 root wheel 1024 Jul 1 00:21 serv1.monthly.3
2 drwxr-xr-x 24 root wheel 1024 Jun 1 00:22 serv1.monthly.4
2 drwxr-xr-x 24 root wheel 1024 May 1 00:27 serv1.monthly.5
2 drwxr-xr-x 23 root wheel 1024 Nov 15 00:52 serv1.sday.0
2 drwxr-xr-x 23 root wheel 1024 Nov 14 18:55 serv1.sday.1
2 drwxr-xr-x 23 root wheel 1024 Nov 14 12:58 serv1.sday.2
2 drwxr-xr-x 23 root wheel 1024 Nov 14 06:53 serv1.sday.3
2 drwxr-xr-x 23 root wheel 1024 Nov 1 00:51 serv1.weekly.0
2 drwxr-xr-x 23 root wheel 1024 Oct 25 00:51 serv1.weekly.1
2 drwxr-xr-x 23 root wheel 1024 Oct 18 00:52 serv1.weekly.2
2 drwxr-xr-x 23 root wheel 1024 Oct 11 00:48 serv1.weekly.3
sday.3 becomes daily.0 and daily.6 becomes weekly.0 and weekly.3
becomes monthly.0
--
Please to meet you, Rose. Now run for your life!
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