Hi Rick, Le 11/08/2015 19:18, Rick Stevens a écrit : > On 08/11/2015 09:18 AM, Chris Murphy wrote: >> On Tue, Aug 11, 2015 at 3:05 AM, Diogene Laerce <me_buss777@xxxxxxxx> >> wrote: >> >>>> https://wiki.archlinux.org/index.php/Full_System_Backup_with_rsync >>> >>> Is there a trick I don't see here ? Because if the backup of those >>> directories >>> is enough for a full restoration of a system state, this method is >>> far more >>> efficient than the others, isn't it ? As one does not need to reboot >>> and >>> just have >>> to make a script or/and a cron job to make his own snapshot. >> >> I don't consider a backup and snapshot to be the same thing. Copying >> (or rsyncing) some directories to another volume is a backup. A >> snapshot is a deduplicated copy of something at a particular moment in >> time, on the same volume or storage pool. It's not a backup, in that >> if the pool implodes both the original and snapshot are lost. A >> snapshot can be used as a source for a backup, since you can make a >> snapshot that doesn't change while the backup is happening. > > I agree with Chris. Snapshots are ways of restoring data that has been > perhaps corrupted or deleted or going back in time to some earlier > point in the filesystems' life. They aren't backups. > > Backup philosophies and techniques vary depending on what you need for > your unique situation. I'm not claiming what I do is the best, but this > is what works for me: > > On the last Friday of a month, I plug in a big ESATA or USB3 drive and > use it to store the output of Mondo Rescue. I have the backup in the > form of DVD-sized ISO images I can burn DVDs from and there is a > recovery DVD you can boot from. That gives me a backup usable to > restore to bare metal. > > Once a week (or more often if there's been significant changes), I use > a _different_ ESATA or USB3 drive and run an rsync that backs up > everything except a few things (/proc, /sys, /dev, /media, > /var/log/journal, various caches, etc.) to a directory on that external > drive based on the hostname and date I ran the backup. That permits me > to restore data that's a bit more recent than the MondoRescue stuff. > > I'd be happy to share the MondoArchive and rsync scripts if you wish. > Tweak to suit your needs. Thank you for the offer. I'm going to stick with RedoBackup but I'd really like to have a look at your rsync scripts, and maybe at what various caches you think of. Kind regards, -- “One original thought is worth a thousand mindless quotings.” “Le vrai n'est pas plus sûr que le probable.” Diogene Laerce
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