Heitor, Josip,

Thanks for the replies. That does make sense. 

I don't see a huge benefit at the moment from doing differential backups. Most 
of the data which is backed up is not changing but being added to ( so volumes 
are getting bigger due to additional files). In the video its explained that if 
same files are being changed then there is not much benfit in terms of space 
saving for incremental. One thing I didn't understand is why would one do 
incremental AND diff backups? Surely only one should be the strategy right?  

In theory do incremenal backup will take much less time?

But as you mention restore will be slower. Need to weigh the pros and cons. 


-----Original Message-----
From: Josip Deanovic [mailto:djosip+news AT linuxpages DOT net] 
Sent: 17 August 2015 12:54
To: bacula-users AT lists.sourceforge DOT net
Subject: Re: [Bacula-users] Choosing a backup strategy

On Monday 2015-08-17 12:09:15 Waqar Khan wrote:
> Hi all.
> 
> Bacula version: 5.0.0
> 
> At the moment I do a full backup at the start of the month then do a 
> diff backup every weekend and incremental backups every evening. I 
> would like a way to speed up the entire backup process. I am thinking 
> of removing the diff backup jobs and only running full and then 
> incremental. Would this be a good strategy? My backups are file 
> volumes and no tapes.
> 
> Thanks in advance!


In my opinion, yes it should be fine but your restore will be a bit slower.

Differential backups are valuable feature when you are dealing with tapes as 
this would decrease the number of tapes that need to be changed while restoring 
the complete system or huge bunch of files located on a number of different 
tapes.

If you are using only files as volumes you could still benefit from the 
differential backup but it wouldn't be significant as in the case of tapes.

If you are trying to speed up your backup make sure that you are not using 
spooling data feature which doesn't make much sense if you are using file 
volumes exclusively.


--
Josip Deanovic

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