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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