Re: [CentOS] [SOLVED] Re: Backup Suggestion on C7

[Keith Keller]

On 2016-10-12, Alice Wonder  wrote:
> I'm sure some people will tell me I'm doing it wrong but I always just 
> use rsync for backups, automated in cron.

You're doing it wrong.  ;-)

You're not really doing it ''wrong'', it just depends on what your needs
are.  One drawback to using just rsync is, if a user deletes a file,
then needs it back after the rsync was run again, the file may no longer
be in your backups (similar if the user modified it and needs the original
pre-mod file back).  If you're okay with that, then rsync is fine for
your needs.

rsnapshot uses rsync with hard links to be able to efficiently keep
snapshots (not point-in-time snapshots, just whatever was present when
rsync sync'd each file) on a periodic basis.  bacula is a more
sophisticated method for doing this efficiently across multiple hosts.
LVM snapshots allow for a real point-in-time snapshot (which can then be
backed up with your favorite tool).

> I may be doing it wrong but it always works.

It always works until it doesn't.  This is unfortunately all too true
when it comes to backups.  It's easier to inspect backups on disk than
when they used to be done to tape, but it's still good to verify them
outside of your normal backup routine periodically.

--keith


-- 
kkel...@wombat.san-francisco.ca.us


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Re: [CentOS] [SOLVED] Re: Backup Suggestion on C7

[Alice Wonder]

I'm sure some people will tell me I'm doing it wrong but I always just 
use rsync for backups, automated in cron.


I may be doing it wrong but it always works.

On 10/12/2016 07:14 AM, Alessandro Baggi wrote:

Hi list,
I've solved my problem.

I've understood some concepts.

I've defined bacula-sd multiple devices with different Media Type and
configured different storage directives in director.

Thanks.



Hi list,
I'm building a backup server for 3 hosts (1 workstation, 2 server). I
will use bacula to perform backups. The backup is performed on disks (2
x 3TB on mdraid mirror) and for each hosts I've created a logical volume
with related size.

This 3 hosts have different data size with different disk change rate.
Each host must have a limited sized resource and a reserved space. If a
server needs more space to perform backup, It must be enabled and
provisioned.

My first solution was put each host pools on different logical volumes,
like:

host1 -> lv1
host2 -> lv2
host3 -> lv3

and store pools/volumes on specified storage daemon that uses a
specified device for each different hosts.

host1 -> storage1 -> device_lv1
host2 -> storage2 -> device_lv2
host3 -> storage3 -> device_lv3


 Unfortunately, I can't define on bacula-sd.conf multiple storage
definition but only multiple devices. To use different storage I must
run 3 bacula-sd on same host (I can?), run a bacula-sd on a vm/host.
Ah, I must use only one physical server.

With one single machine and the current state I can't use multiple
storage daemons.

There are other ways to store host volumes on different devices?

My second solution was, use only one storage daemon (on the same host)
with a single device LVM over mdraid, create pool for each hosts and
limit the size for each volumes on related pool.

Suggestions?

Thanks in advance.







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