On Sep 29, 2011, at 12:30 AM, Daniel Sparrman wrote:

> I'm not fully aware of how the DD replicates data, but if you have 
> 15-20TB/day being written to your main DD, and that data is then replicated 
> to the off-site DD, how much data is actually replicated?
> 
> With a 1Gbs connection, you could hit values up to 360GB/s hour (expecting 
> 100MB/s which should be theoretically possible, but it's usually lower than 
> that on a 1Gbs connections) which means 8.6TB per 24 hours. So the data is 
> both deduplicated and compressed before you send it offsite?

It's certainly de-duped before being replicated; it's probably compressed as 
well, but that's less obvious to me. 

> Does the DD do the dedup within the same box, or require a separate box for 
> dedup?

Same box, as an in-line process. They're very proud of that. 

Nick

> Daniel Sparrman
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