On 2017-01-04 9:57 am, Phil Stracchino wrote:
> On 01/04/17 10:52, Martin Simmons wrote:
>>>>>>> On Fri, 30 Dec 2016 18:37:28 -0300, Sergio Belkin said:
>>>
>>> I have 4 disks:
>>>
>>> I'd want to plug every disk every monday.
>>>
>>> So, Mondays run Full Backups and the rest of the days
>>> Differential/Incremental ones
>>> ...
>>> I'd want that operator: rotate from disk 1 to disk 4 regardless the
>>> week of
>>> the month. Or at least is a way that set the number of week of the
>>> month
>>> regardless of the day of week?
>>
>> You could use "Week of Year" notation (w01, w02 etc) plus the day
>> (mon, tue
>> etc). The schedule might have to be rewritten every year to get
>> continuity
>> though.
>
>
> Or you could go the calendar-independent route and set an appropriate
> volume use window. If you set the volume use window to be just less
> than a week, expiring late Sunday night or early Monday morning, it
> will
> force Bacula to rotate to the next volume weekly.
>
>
the official likely most correct answer would probably be to enable a
virtual tape library and disk changer script. I am doing a similar thing
but with only 3 disks instead of 4. I had looking into setting up a
virtual tape library and about 30 minutes into trying to find out how to
make everything work I thought this is way more complicated than it
needs to be. So I rethought the idea and came up with a different
solution.
I am using multiple backup disk volumes per disk, and setting the
expiration on volumes and jobs at 18days, a few days under the 3 weeks
that the disk will be reused, that way I am sure the fulls have expired
even if some of the incremental jobs haven't before the next full as I
don't have enough disk space for a second full backup.
I then simply created 3 scripts to set the volume enable/disable
property. Then when I change the disk I run the correct script so that
it disables the other volumes and enables the current ones.
Example script, this would enable the volumes on BV100 - BV102 and
disable BV200 - BV202 & BV300 - BV303.
update volume=BV100 enabled=1
update volume=BV101 enabled=1
update volume=BV102 enabled=1
update volume=BV200 enabled=0
update volume=BV201 enabled=0
update volume=BV202 enabled=0
update volume=BV300 enabled=0
update volume=BV301 enabled=0
update volume=BV302 enabled=0
This approach may not be practical for you the virtual tape library
approach I believe will require a lot less interaction on the operators
part. In my case I am using FreeBSD on the server and encrypting the
drives with GELI encryption so I have to login and attach the volume
entering the password before it can be mounted so its not a big issue to
then open bconsole and use @intput script to enable the correct volumes.
I have been doing this for about 5 years now, originally on 4 1TB disks
and now on 3 2TB disks I couldn't afford a 4th 2Tb at the time I
upgraded all of them and just never got around to adding a 4th later.
Its been successful unless I forget to change disks, I keep the 2 not in
use in my office desk drawer for offsite copies and run my full jobs on
Monday night with incremental every now and then I forget to bring the
oldest one home on Monday and with no disk drive laying around to remind
me, I don't disable my fulls and they fail due to space and I have to do
some cleanup.
--
Thanks,
Dean E. Weimer
http://www.dweimer.net/
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