Hi all,
I've just found BackupPC, and I was wondering if it will achieve what I need
it to?
I have a two site network, one in the US, and one in the UK.
Our bandwidth is limited, though will be increasing at some point in the
future, though I couldn't say how much...
I want to backup my data from one site to the other...
In order to assess whether that would be do-able, I went to an exhibition of
backup technologies.
One that caught my eye was a company called Data Domain, who claimed to
de-duplicate data at the block level of 16KB chunks...
Apparently, all they send are the changed chunks and the schema to retrieve
the data.
What I am wondering is would BackupPC be a suitable open source replacement
for that technology...?
Does it send the changed data down the line and then check to see if it
already has a copy, or does it check then send?
Presumably it would save significant bandwidth if it checks first...
The other thing is, can BackupPC de-duplicate at the block level or is it
just file level?
I'm thinking that block level might save considerable amounts of traffic,
because we will need to send file dumps of Exchange databases over the
wire...
... Which I assume will mean that we've got about 16GB at least to copy
everyday, since it'll be creating a new file daily...
On the other hand, would 16KB blocks be duplicated that regularly - I
imagine there is a fair amount of variability in 16KB of ones and zeros, and
the chances of them randomly reoccurring without being part of the same
file, I would say are slim...
What do you think?
Any help would be greatly appreciated?
Jx
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