On Wed, Dec 23, 2009 at 01:58:30PM -0800, Engel Sanchez wrote: > Thank you all for your suggestions! I'm going to go with the solution of > doing cascaded rdiff-backups both pointing at the source directories and > without rsync and simply spreading the cron jobs to avoid touching the > sources while they are updated (the sources are hot copies of a couple of > databases and a subversion repo). Using rsync and risking leaving the remote > backup in a bad state didn't seem like a great idea to me. (Say rsync's > connection breaks and original server fails before next backup). At least > rdiff-backup can deal with a partially updated backup if also done by > rdiff-backup.
strange for the same reasons I have used rsync - I can capture when it fails and restart and it doesn't need to roll back it continues where it left off. rdiff-backup has to unroll and then restart so for a 2 hour backup that fails in the last 10 min, you will need to do another 2 hours of backup with rdiff-backup and only 10 min with rsync.... to stop the corruption problem right now I use semaphores around my backup scripts to stop certain things happening at the same time :) Alex > > Engel A. Sanchez > > > “Do what you love to do and give it your very best. Whether it's business or > baseball, or the theater, or any field. If you don't love what you're doing > and you can't give it your best, get out of it. Life is too short. You'll be > an old man before you know it.” > > > http://engelsanchez.net > > > > ----- Original Message ---- > From: Alex Samad <[email protected]> > To: [email protected] > Sent: Wed, December 23, 2009 4:13:16 PM > Subject: Re: [rdiff-backup-users] Safe to mirror backup dir with rsync? > > On Wed, Dec 23, 2009 at 12:52:03AM +0100, Cybertinus wrote: > > Hello, > > > > I'm using rdiff-backup to create the backups of my directories. It all > > goes to /backup, which is a external harddrive. Then I'm using rsync to > > mirror everything to /backup_sync, which is a second external harddrive. > > This one is encrypted and I move it to an external location once a week > > (and the disk from the external location then becomes the sync disk ;) > > ). I'm using this strategy because when I swap the sync disks, they are > > disconnected from my computer for a day. Some data I'm backing up every > > hour, so I need a external drive at my computer at all times. > > This system is working perfectly for me. The only thing I would > > recommend is to prevent running rdiff-backup at the same time as rsync. > > To prevent that your mirror is accidentally destroyed, because you would > > by rsyncing incomplete rdiff-backup data. I haven't build in this > > precaution in my backupscripts yet. For the time being I'm preventing it > > from running at the same moment by choosing the correct times in my > > cronjobs. > > Hi > > I am doing something similar. > > local machine rdiff-backup to /backup (lvm partition). > then a rsync to the local backup server and at the same time a rsync to > an offsite location - via adsl. > > I do this because my initial rdiff-backup can happen quickly and cause > the lest disruption - if the source is on a lvm I can take a snapshot > and use that but not all the sources are. > > I have come across one problem, if the over adsl takes too long the > rdiff-backup destination on the local machine can change thus giving you > a non in sync backup offsite. > > There is another thread asking for a tool to lock the destination to > prevent this > > Alex > > > > > Cheers, > > Cybertinus > > > > On 23/12/09 00:03, Gavin wrote: > > > Hi Engel, > [snip] > -- "Bureaucracy is the enemy of innovation." -- Mark Shepherd, former President and CEO of Texas Instruments
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