Re: [rdiff-backup-users] delete initial mirror

[Alex Samad]

On Thu, Oct 22, 2009 at 03:53:00PM -0400, R. David Murray wrote:
> On Fri, 23 Oct 2009 at 06:40, Alex Samad wrote:
> >On Thu, Oct 22, 2009 at 08:41:57AM -0400, Daniel Miller wrote:
> >>On Oct 21, 2009, at 10:03 PM, plug bert wrote:
> >>>  Hmm...so in that case, if i want to incrementally back up a
> >>>100gb file daily for one week, and for simplicity's sake, assume
> >>>the file grows 1gb per day, my backup media will need to be at
> >>>least 100gb + 6gb?
> >>
> >>Yes... plus a bit of space for rdiff-backup housekeeping data.
> >
> >sorry, doesn't rdiff-backup work at the file level, not the block level.
> >so a 100G file that has 1 byte changed, mean that 200G of backup space
> >is used ?  so for 6 days of changes to the 100G file that would take up
> >600G of space
> 
> No, it uses librsync and does deltas on "arbitrary length octet streams".
> So it only transmits and stores the changed data, not a new copy of the
> entire file.

okay - thats good news

> 
> --David
> 

-- 
"It is time to set aside the old partisan bickering and finger-pointing and 
name-calling that comes from freeing parents to make different choices for 
their children."

        - George W. Bush
04/12/2001
on parental empowerment in education

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