Re: [rdiff-backup-users] Restructuring an archive

[Dominic]

Thanks Ryan, that looks just the ticket!

Dominic

Ryan How wrote:
> Use vshadow + dosdev to assign the snapshot to a drive letter. Then
> you can run rdiff-backup on that snapshot drive
>
> You'll find some handy scripts by googling
>
> heres the main one I followed
>
> http://blogs.msdn.com/adioltean/archive/2006/09/18/761515.aspx
>
> HTH
>
> Ryan
>
>
>
> Dom wrote:
>> Quoting Chris Wilson <address@hidden>:
>>
>>> On Thu, 13 Nov 2008, Dominic wrote:
>>>
>>>> I'm also curious about the additional overhead (in disk space) that is
>>>> created by frequent rdiff-backup runs. If one backs up daily, how much
>>>> more disk space is used than if one backs up weekly? In theory no more
>>>> because 7 x daily incremental diffs have the same info as 1 x weekly
>>>> incremental diff.
>>>
>>> I was running a backup of about 150 GB of data three (home directories)
>>> about 3 times a day, and it was taking 8 MB per incremental backup with
>>> rdiff-backup 1.0.5, even if nothing had changed. It may well be less
>>> with
>>> more recent versions, due to (1) compressed metadata and (2)
>>> incremental
>>> patches to metadata.
>>>
>>> Cheers, Chris.
>>
>> Hi Chris
>>
>> Thanks for your input. So I reckon that in your case the overhead of
>> having 3x daily as opposed to 1x daily backups is about 4GB per year,
>> which is 3% and so not significant.
>>
>> In relation to my other question about backing up locked files, my
>> research so far suggests that the solution is to use snapshots: for
>> Linux this means LVM (which fortunately we already use, because our
>> server runs Devil-Linux), and for Windows XP there is a handy utility
>> called vshadow.exe which creates a temporary snapshot which can then
>> be used (I hope) by rdiff-backup.
>>
>> Cheers, Dominic