Le 11/08/2015 22:54, Rick Stevens a écrit : > On 08/11/2015 10:52 AM, Diogene Laerce wrote: >> 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_buss...@yahoo.fr> >>>> 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. > > The rsync backup is done via this script: > > ---------------------- CUT HERE -------------------------------------- > #!/bin/bash > # Back up system to a specific directory given on the command line. > Excludes > # the /proc, /sys, /dev and /media directories > MYHOST=`hostname` > TODAY=`date +%d-%b-%Y` > if [ $# -lt 1 ]; then > TGT="/media/500GB-Drive/Backups/$MYHOST-BackUp-$TODAY" > OPT="" > else > TGT="$1/$MYHOST-BackUp-$TODAY" > OPT="--exclude=$1/***" > fi > > nice -n 19 /bin/rsync -avXA --exclude-from=/etc/skipdirs.rsync $OPT / $TGT > ---------------------- CUT HERE -------------------------------------- > > And the "/etc/skipdirs.rsync" file is: > > ---------------------- CUT HERE -------------------------------------- > /proc/* > /sys/* > /dev/* > /media/** > /var/log/journal/* > /BACKUPS/*** > **/.cache/google-chrome/*** > **/.ccache/*** > /run/media/** > var/lib/docker/* > ---------------------- CUT HERE --------------------------------------
Thank you for those.
Caches are roughly what I was thinking of but I would not have
thought of nice.. Nice.
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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