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.
--David
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