On mardi, 15 mars 2016 13.00:19 h CET John Naggets wrote:
> Hi Bruno,
> 
> Thanks for your example but somehow I am not sure about the "Maximum Volumes 
> = 1" parameter. If I understand correctly this parameter it means I would 
> have only one single volume or file respectively in my pool? 
> 
> Because I am using the default config of bareos with 3 pools: Full, 
> Incremental and Differential and having only one single file does not make 
> sense.
> 
> Regards
> John
> 

For sure my example was addressing only one case, having one volune for one job 
in one pool, with one device storage.
(typical setup for customer who want a job for each week)
Which give me 5 files 

One of the hard thing to understand (at least at the beginning) is that there's 
not a one fixed way to do and organize your
backup with Bareos, you can be really creative :-)

So just an example in your case (but as I didn't have all the elements, don't 
forget to taint that with a grain of salt)
I will take the simple setup with one dir, one sd, one client

You want for Example a Full pool for 12 months so you setup the pool to handle 
12 volumes
with a retention time of a bit less than one year.
The full job will goes there, and one full pro month for one job 
Then on you device storage you will have 12 media

Differential will handle 4-5 weeks at you discretion I prefer 5 
So the pool has retention period of 28 days, and 5 volumes 
Device like for month

Incremental will run for 7 days so you create a pool with retention time for 
6.5 days
and limit to 7 volumes.

All of them will normally have one storage device.

This is one way of doing things. 

You can imagine differents things, like having a pool days (where on sunday you 
have a full job
and then 6 incremental) this job use one pool one storage one type of media
Then you add another pool which contain diff (weeks) and another one for full 
(months)
using another time retention (weeks 28 days), month (11.5 months) but share 
another storage
device and media type   

:-) And now I'm pretty sure I've lost you ....

There's one golden rules, on which you should make all your configuration : 
What I want to restore, for how long, and how complicated/speed.

This is your "sla", each time you modify your configuration, take your time
to check if you comply to what you decide is good for your restores.


> On Tuesday, March 15, 2016 at 7:18:45 AM UTC+1, Bruno Friedmann wrote:
> > On samedi, 12 mars 2016 12.35:22 h CET John Naggets wrote:
> > > Hello,
> > > 
> > > In the default director config of bareos the three pools full, 
> > > differential and incremental all use one volume to store many jobs as 
> > > long as the max volume bytes has not been reached.
> > > 
> > > So I was wondering is this because of effeciency? Because I was thinking, 
> > > that it might be better to have one volume per job instead? 
> > > 
> > > By the way I am using file based storage and no tapes, so that would mean 
> > > I would have one file per job.
> > > 
> > > Regards
> > > John
> > > 
> > > 
> > Hi John, in case you didn't find it.
> > 
> > In pool definition you can use 
> > 
> > For example to have only one media with one job in a pool WEEKNN (01-05)
> > you can setup 
> > 
> >   Maximum Volumes = 1                   # We use one media in weekNN pool
> >   Maximum Volume Jobs = 1               # we put only one job per media
> > 
> > It is a valid different way of doing things.
> > 
> 
> 


-- 

Bruno Friedmann 
Ioda-Net Sàrl www.ioda-net.ch
 
 openSUSE Member, fsfe fellowship
 GPG KEY : D5C9B751C4653227
 irc: tigerfoot

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