Bacula-users

Re: [Bacula-users] feature suggestion: convert old full backups to?"reverse" incremental backups

2009-09-04 05:01:12
Subject: Re: [Bacula-users] feature suggestion: convert old full backups to?"reverse" incremental backups
From: Nicolas Jungers <nicolas AT jungers DOT net>
To: bacula-users <bacula-users AT lists.sourceforge DOT net>
Date: Fri, 04 Sep 2009 10:55:56 +0200
Gavin McCullagh a écrit :
> Hi,
> 
> On Thu, 03 Sep 2009, Kern Sibbald wrote:
> 
>> I suspect that all that is already possible with Bacula but may require a 
>> bit 
>> of scripting.  In short, you need support from a Bacula specialist, and we 
>> don't do that on this list (bacula-devel).
> 
> Fair enough.  I asked for suggested approaches on -users a few weeks ago
> but didn't get much back.  Perhaps we need to put our hands in our pockets
> :-)
> 
>> What you are asking for is a bit specialized, so I doubt that it is 
>> something 
>> that would be directly implemented in Bacula, unless we saw that it was 
>> something a lot of users want, which means it would need to be a very 
>> clearly 
>> defined Feature Request, voted on, then someone would need to volunteer to 
>> write it.  

I wasn't subscribed a few weeks ago which should explain my lack of
reaction :-)

I'm missing three features in Bacula:
1. the ability to have long term snapshot;
2. the ability to backup file differential (rsync type);
3. the ability to include/exclude file based on arbitrary metadata
criterium e.g. filesize.

Point 3 can be addressed by overloading the use of the nodump flag, but
it's a hack (for which I don't see too much drawback at first).

Point 2 is very handy when facing application like Mozilla Thunderbird
which stores email in a mbox file.

Point 1 is also obviously needed when you want to have months or years
of retention with a limited amount of storage.

My understanding of the whole is that the needs I have are more or less
dictated by my use of disk based media when facing a few hundred clients
to backup. The client being numerous are considered "wild" so I need a
way to enforce my policy (point 3).

Unfortunately (or fortunately) Bacula is the only game in town if you
want to have a sql backend which is quite more sane than using/abusing
the filesystem.

So I'd like to end what I've to admit is a rant by forcefully approving
the request made by Gavin.

Nicolas

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