On Fri, Oct 16, 2009 at 8:05 PM, Jose Perez <jvoorhe...@gmail.com> wrote:
> Hi people:
>
> I'm trying to find the best combination of Full, Differential and
> Incremental backups to save disk space, I'd like someone can help me
> with some ideas:
>
> Our policy says that we must keep user data of last 3 months, so
> according to that I planned to do something like this:
>
> Client {
> ...
> ...
> File Retention = 90 days
> Job Retention = 90 days
> }
> Pool {
> Name = Default
> Type = Backup
> Recycle = yes
> Autoprune = yes
> Label Format = Vol-
> Volume Use Duration = 10 days
> Volume Retention = 90 days
> }
> Schedule {
> Name = Daily
> Run Level=Incremental Pool=Default
> }
>
> As you see I only run Incremental backups letting Bacula autodetect
> the first as a Full Backup. So after 90 days I would have a Full
> Backup and 89 Incremental Backups (or so), but past ten days my first
> Volume (the one that includes my first and unique Full Backup) would
> be marked as Purged and consequently Recycled. So I would lose the
> posibility to restore my hole data within those 90 days because with
> many incremental but no full backup I can't do anything, right?
>
> If I pretend not to lose my Full Backups every time a Volume gets
> recycled I think should be necessary to run a Full Backup every ten
> days, right? But I think that doing so would consume too much disk
> space, or not?
>
> - Is this the best way (space economically) to keep 90 days of recoverable
> data?
> - Do I need to use different Pools for Incremental and Full Backups?
> - What are your best backup strategies to keep data available to be
> restored?
>
> Please consider that I'm using File disk Backups. I hope someone can
> point me to better ideas than mine
>
>
Here's one possibility:
Pool {
Name = Full
...
Volume Use Duration = 23 hours
Volume Retention = 89 days
}
Pool {
Name = Differential
...
Volume Use Duration = 23 hours
Volume Retention = 89 days
}
Pool {
Name = Incremental
...
Volume Use Duration = 23 hours
Volume Retention = 90 days
}
Do a Differential once every 90 days and Incrementals the rest of the time.
In theory, you only need to run one Full backup. Ever. In practice, you'll
probably want to create a new Full backup every year or so to clear out the
obsolete data and make your differentials smaller (and faster).
Another way to do it that uses even less disk space would be to eliminate
the differentials completely and just create a new Full backup every 90
days.
- Cedric
------------------------------------------------------------------------------
Come build with us! The BlackBerry(R) Developer Conference in SF, CA
is the only developer event you need to attend this year. Jumpstart your
developing skills, take BlackBerry mobile applications to market and stay
ahead of the curve. Join us from November 9 - 12, 2009. Register now!
http://p.sf.net/sfu/devconference
_______________________________________________
Bacula-users mailing list
Bacula-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/bacula-users
