rsync - Apr 2006 - Increamental backup

Hello Folks,

I happened to have won atleast something because my backup off the site is
working absolutely well at the scheduled interval. But I am having one
question, which I know this community could help me getting it down and
having everything working the way I really want. This is about having
increamental backup. Here's the script I thought, If Include it in the
crontab might work but I am not so sure probably you guys could help me if I
am a wrong track or right;

20 16 * * 5 rsync -avz -e "ssh -i rsync" --compare-dest=Souredirectory
Destinationdirectory

Would that script to have increamental back? I do welcome any advices.


Thanks in advance

--
Ndaula Ahmed
WEC Volunteer
iEARN-US
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On Thu, Apr 13, 2006 at 12:44:07PM -0400, Ahmed Ndaula
wrote:
> 20 16 * * 5 rsync -avz -e "ssh -i rsync"
--compare-dest=Souredirectory
> Destinationdirectory
> 
> Would that script to have increamental back?
The --compare-dest option will only copy files that are different from
those in the specified compare-dest hierarchy into the
Destinationdirectory hierarchy, so that will give you an incremental
backup operation.  Note that the option is relative to the destination
dir, so you probably need to say:

    --compare-dest=../Sourcedirectory

Also, the Sourcedirectory needs to be a complete copy of the files
from the source machine as they existed at the time of the prior copy.
If you just repeated that rsync command without any changes to the
destination hierarchy, more and more changed files would show up in
Destinationdirectory.  If you want to get just the changed files from
the most recent rsync run, you'll need to have moved all the changed
files from prior run out of Destinationdirectory into Sourcedirectory
so that rsync will have an empty destination hierarchy to copy into.

If you're not copying the changed files to another medium (such as
tape), you should consider using --link-dest, which will give you what
appears to be a full backup (on disk), but it will hard-link unchanged
files together with the prior hierarchy to save space.

..wayne..