Re: 15TB?
I'm guessing his figure is based on the proportion of data seen in such a link.
Nope:
"on a one-gig connection... there would normally be 15TB of data a year going through it. Even if a small proportion of that is deemed "communications data," it will still amount to enormous quantities of data that need to be stored."
He is saying that a normal 1Gb link would see 15TB/year pass through it. Less than that will need to be stored.
I don't find it that surprising that the quantity of data is so low. People (individuals and companies) want the internet to be fast when they need it. They will spec the pipe so that it is fast enough for what they need when they want it to be fast, but it will be virtually idle much of the time. ISPs count on this, and view those who consistently max out their pipe to be "abusing" the service.
Biting the hand that feeds IT
