I see I follow a different backup policy from Sambo.
Sambo keeps the last N backups in the same physical hard disk (or maybe
RAID array). I keep a backup in a removable device. My policy is to
never trust a single interconnected system with my data (so that I'll
not suffer massive data loss if my UPS+computer are fully zapped by
power surge from the mains, or if the computer's hard disk goes kaput).
I have two removable hard disks, each one containing an almost full
backup of my computer's filesystem. I rsync to each of them in
rotation. Since I don't want to spend several hours on backup each day,
this scheme allows me to keep only the two most recent backups (with
rsync saving time by not copying over a file which was not modified
since previous backup).
What I would like to have is a Time Machine (TM?) like scheme in which a
backup disk will enable me to see a snapshot of my computer's disk from
a certain date. It can be implemented by making hard links.
Did anyone develop such a backup script?
--- Omer
On Mon, 2011-03-21 at 21:34 -0400, sammy ominsky wrote:
> On 21/03/2011, at 15:57, Omer Zak wrote:
>
> > By the way, my own backup script uses the following rsync flags:
> > rsync -avH --progress --max-delete=200000 --delete --delete-excluded
> > --exclude-from=$EXCLUSIONS_FILE $FROM $TO
>
>
> This looks like a fun game! I'll show you mine if you'll show me yours.
>
> #!/bin/bash
>
> date=`date "+%Y-%m-%d"`
>
> mkdir /nas/web-backup/Backups/${date}-incomplete
> rsync -avP --exclude-from=/etc/rsync/web-exclude
> --link-dest=/nas/web-backup/Backups/current /nas/web/
> /nas/web-backup/Backups/${date}-incomplete
>
> mv /nas/web-backup/Backups/${date}-incomplete /nas/web-backup/Backups/${date}
> chown -R www-data:www-data /nas/web-backup/Backups/${date}
>
> cd /nas/web-backup/Backups
> rm /nas/web-backup/Backups/current
> ln -s ${date} current
> unset date
>
> # delete backups created more than 7 days ago
> find /nas/web-backup/Backups/ -maxdepth 1 -ctime +6 -exec rm -rf {} \;
--
Wilcox-McCandlish Law of Online Discourse Evolution:
The chance of success of any attempt to change the topic or direction of
a thread of discussion in a networked forum is directly proportional to
the quality of the current content.
My own blog is at http://www.zak.co.il/tddpirate/
My opinions, as expressed in this E-mail message, are mine alone.
They do not represent the official policy of any organization with which
I may be affiliated in any way.
WARNING TO SPAMMERS: at http://www.zak.co.il/spamwarning.html
_______________________________________________
Linux-il mailing list
Linux-il@cs.huji.ac.il
http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
