Bacula-users

Re: [Bacula-users] clarification on purging and File volume retention

2011-08-03 13:03:18
Subject: Re: [Bacula-users] clarification on purging and File volume retention
From: scar <scar AT drigon DOT com>
To: bacula-users AT lists.sourceforge DOT net
Date: Wed, 03 Aug 2011 09:59:49 -0700
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Graham Keeling @ 08/03/2011 03:34 AM:
> On Tue, Aug 02, 2011 at 05:11:11PM -0700, scar wrote:
> i'm not using tapes, i just have my volumes stored in a directory.  it's
> my intention to take a full backup every month on the first, with
> incrementals and differentials during the month like in the default
> configuration.  with a volume use duration of 23 hours, a new volume
> will get created every day.  so, it seemed reasonable to me to have the
> volume retention set to 40 days.  with AutoPrune and Recycle both set to
> yes, this seemed like a maximum of 40 volumes would be created and used,
> thus limiting the amount of disk space the backups would use.
> 
> but then i started reading the other settings for the Pool resource, and
> confusion ensued.
> 
> in there, it indicates the minimum volume retention should be twice the
> interval of my full backups, i.e. two months.  anyone care to explain
> that?  it seems to me with a 40 day limit, at least 2 full backups will
> always exist.
> 
>> Just taking your first question - there is discussion here:
>> http://adsm.org//lists/html/Bacula-users/2011-01/msg00305.html

thanks.  BTW i meant i will always have at least 1 full backup (and for
a time i will have 2 full backups).  as long as i have at least 1 full
backup i'm happy, so i think 40 days is fine.


> secondly, it goes on to say that i should be using `Action On Purge =
> Truncate` along with a RunScript in my CatalogBackup Job to run `purge
> volume action=all allpools storage=File`.  when i went to read up on the
> `purge volume` command, it seems to me that the command should really be
> `purge volume action=*truncate* allpools storage=File`.
> 
> finally, i then went on to read about the "Recycle Oldest Volume"
> directive which sounds reasonable, but i'm confused as to what is really
> happening without this directive set to yes.
> 
> is all of this really necessary?  thanks
> 
> here's my Pool resource currently,
> 
> Pool {
>   Name = File
>   Pool Type = Backup
>   Recycle = yes
>   AutoPrune = yes
>   Volume Retention = 40 days
>   Maximum Volume Bytes = 100G
>   Maximum Volumes = 100
>   LabelFormat = "Vol"
>   Volume Use Duration = 23h
> }
> 

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