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Re: [Duplicity-talk] Suggested increment chain

From: Richard Scott
Subject: Re: [Duplicity-talk] Suggested increment chain
Date: Fri, 13 Feb 2009 20:25:41 -0000 (UTC)
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Hi Marcus,

I think what your describing is also known as a differential backup.

It would be nice if Duplicity had this feature.... and also perhaps a feature 
to keep the last x
differentials since the last full backup too?

For exmaple, do a full backup on the 1st of the month and then take daily 
differential backups.
Come the 31'st of the month you could select to keep the last 5 differential 
backups so deleting
all differential backups from the 2nd to the 25th. Obviously the last full 
backup on the 1st would
be kept you can continue the next month with just doing daily differentials.

This way you could do a full backup less often and the backup chain would also 
be shorter as it
would only involve two files i.e. the full backup and the chosen differential 
to restore with.

Is that the idea you are thinking about too?



> On 13/02/2009 14:37, Kenneth Loafman wrote:
>> As to frequency, I would suggest a full every week and incrementals
>> every day.  This means that if a backup should be bad, you won't be out more 
>> than a week or so
>> from the last recoverable backup.
>> There is no "right" answer, so its all tunable to the usage.
> Is there anyway to create a diff with duplicity? Or get an incremental
> that ignores all current incrementals and performs an incremental purely 
> against the last full
> backup (so basically is a diff)?
> Thanks
> Marcus
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