Hello,
You are sort of in an impossible situation. With the large amount of
data you have and the small backup space, it will be hard to make Bacula
work as it should.
My very strong conviction is that any single backup job that last more
than 10 hours is too long. If it takes 7 days to backup one machine,
Bacula will not work very well.
At a minimum you should split your Windows backup into four separate
jobs each one backing up a single drive. Then after completing a full
backup of each drive, you can stagger backups to do a full of the
machine over 4 days (one for each drive). That will reduce the overall
backup load. However, if a backup of a single drive takes 2 days, in my
opinion, it will still be too long.
Another, though slightly more complicated way to handle it is to
separate the Fulls as noted above, but when the next Full for a drive
comes do, do a VirtualFull instead of a full. All the other backups for
that drive can then be Incrementals. At least one of the Incrementals
should be with Accurate = yes. Then as a security measure do another
real Full (per drive) once a year.
About how to handle retention periods: that is too complicated for me to
explain here. The simplest solution is to get much more disk for use by
Bacula, or you can get a professional support to get help for retention
periods, or ask for help on the list. Reading the "Automated Disk
Backup" chapter may help or "Automatic Volume Recycling" and "Basic
Volume Management". It is all there, but it is much easier to
understand with help.
Best regards,
Kern
On 06/20/2016 04:49 PM, Jason Voorhees wrote:
> Hello guys:
>
> I'm running Bacula 7.4.0 to save backup of my Windows fileserver which
> has 4 drives (D:, F:, G:, H:) with 7.1 TB of total capacity.
>
> I've ran a full backup during 7 days which occupied 5.8 TB (~20%
> compression rate) in a local filesystem with local SATA disks. This
> local filesystem is at 80% usage so I don't have enough free space to
> run a 2nd full backup. I was planning to run Full + Incremental +
> Differential backups like this:
>
> - Full -> 1st sunday
> - Differential -> 2nd-5th sunday
> - Incremental -> monday-saturday
>
> If my full backup takes 7 days to complete, how should I schedule my
> jobs? I created 3 Storage resources which each point to 3 different
> directories so I can run a Full+Incremental or Full+Differential jobs
> concurrently.
>
> Also, how long should my retention periods should be so I can run a
> new full backup without filling my disk up to 100%? I thought my
> retention period could be something like 30 days or less (maybe 21
> days)... but .... if my last full backup is overwritten by the new
> full backup I guess I won't be able to have a valid copy during the
> time my new full backup is running (7 days approximately). Am I right?
>
> I hope you can understand how confused I am here.
>
> P.D. I only use bacula to make backups to this Windows fileserver and
> the Bacula server, no more clients are backed up.
>
> Thanks in advance for your help.
>
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