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3 | Cost to Store All US Phonecalls Made in a Year in Cloud Storage so it could be Datamined | |||
4 | estimates by Brewster Kahle June 12, 2013, done to check feasibility of news reports of NSA survaillance | |||
5 | corrections welcome: brewster@archive.org | |||
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7 | number of call-minutes per person per month | 300 | minutes (estimate from my family's usage) | |
8 | sides in a phonecall (caller+receiver) | 2 | since most calls are domestic, only need to record a call once for each reciever/caller pair | |
9 | number of people in the US | 315,000,000 | https://www.census.gov/ | |
10 | number of bytes/sec in a phonecall | 8,000 | this is the uncompressed number, could be compressed to 1/2 to 1/4 easily | |
11 | cost of a Petabyte (PB) of "cloud" storage | $100,000 | this is basically what the Internet Archive pays. Petabyte = 1,000 terabytes | |
12 | Square feet of datacenter space per petabyte | 16 | 2 feet wide by about 8 feet including corridor between racks | |
13 | Power to run a PB | 5 | kilowatts | |
14 | Cost per KWhr | $0.15 | California costs (higher than much of the country, could be 1/2 in other places) | |
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18 | number of bytes/min in a phonecall | 480,000 | calculated from above | |
19 | number of bytes/month for a person | 144,000,000 | calculated from above | |
20 | number of bytes/month for the US | 22,680,000,000,000,000 | calculated (divided by 2 because there is a caller and reciever, don’t need to double count) | |
21 | number of PB/month for the US | 23 | calculated | |
22 | number of PB/year for the US | 272 | calculated | |
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24 | Cost to store all phonecalls made in a year in the "cloud" | $27,216,000 | ||
25 | Square feet to store all phonecalls | 4,355 | ||
26 | Cost of datacenter power for all phonecalls for a year | $1,788,091 | ||
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