[plug] Current state / method / best programs to backup home desktop Ubuntu 13.04
brad at fnarfbargle.com
Tue Aug 13 11:00:52 UTC 2013
On 13/08/13 12:11, Shanon Loughton wrote:
> Brad thanks for the offer, Id love you to help setup my backup system,
Ok, Shannon. Let's make this a public process.
I've done this quite a few times for myself, but it has recently been
pointed out to me that things I take for granted and feel are obvious,
are not necessarily so for other people. Therefore I don't tend to run a
process, I just jump from the question to the answer. If we make this a
process, you are more likely to get what you need rather than what I
blindly assume will work best (ie, what I know). Plus, doing it this way
will give us (you and I) both the opportunity to learn from those that
know this stuff better than we do.
Lets start with what we know you have.
A) A machine with Ubuntu 13.04 on it.
How is the disk set up? For example, a df -h on my desktop gives me :
brad at bkmac:~/config$ df -h
Filesystem Size Used Avail Use% Mounted on
/dev/sdb5 55G 30G 23G 57% /
none 7.9G 4.8M 7.9G 1% /dev
none 7.9G 30M 7.8G 1% /tmp
none 1.6G 128K 1.6G 1% /run
none 5.0M 0 5.0M 0% /run/lock
none 7.9G 112K 7.9G 1% /run/shm
srv:/s/work 550G 314G 209G 61% /media/work
srv:/s/src 19T 13T 5.3T 72% /media/src
/dev/mapper/home 459G 150G 287G 35% /home
Root is on sdb5 (bootcamp on an iMac). home is on /dev/mapper/home which
in reality is a LUKS encrypted volume sitting on /dev/sda1 (which is a
500GB SSD that is double-sided taped in the back of the iMac).
So when I back up, I back up / & home separately.
What do you plan to back up to? I backup to a WD mybook live which is
running Debian and has a LUKS encrypted data volume.
I've also been known to back up to arbitrary machines over nfs, or USB
Given you want a full snapshot (at least one) your backup drive needs at
*least* as much storage as the machine you are backing up.
I backup my desktop, laptop, 2 co-lo boxes, a VDS, the root, home &
business partitions of my server and a separate backup of all my VM's in
under 2TB. My WD mybook has 60 days of rotating backups with plenty of
space to spare. The media backups happen manually to a second machine
that is basically a box of disks chained together and don't feature in
any of this.
Backup bandwidth is a real issue if you change big stuff daily, and also
for the first backup. Because the mybook is encrypted and does not have
hardware acceleration, I can get at best about 6MB/s into it. As long as
I'm not backing up 30G virtual disk files, I can get all my backups done
in less than a couple of hours at night.
USB backups suffer the same bandwidth limitations (although I believe
USB3 is supposed to be a bit better).
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