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Greener Search
1 cup of tea
=
10 gram
CO2
(boiling 250 ml water)
“Performing two Google searches from a desktop
computer can generate about the same amount of
carbon dioxide as boiling a ...
2 x =
1 x
(The Sunday Times)
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
0
10
20
30
40
50
60
70
Google searches per day
average: 25
#searches/day
But maybe you're an
espresso person
...
However ... the original
Sunday Times article
was factually incorrect
25 x =
1 x
6 x =
1 x
So ... no big deal?
Google handles about
1,000,000,000,000
searches per year
To do so, Google deploys
an estimated 500,000 servers
in about 50 data centre worldwide
(these are rough estimates,
Google...
Note the cooling plants ...
Google's data centres in Dalles, Oregon
Each data centre consumes about 50MW
Cooling requires most of the power
Infrastructure cost is about $22,000/kW
Reducing p...
Reduce costs,
save the planet
We (Leif & Wim) have developed a
Greener Search
Solution:
FPGA-accelerated search
The Sinner: Intel CPU
120W (at least)
The Saviour: Xilinx FPGA
3W (at most)
Implementing IR algorithms on FPGA:
20x faster @
10% of the power!
Some results
Effect on data centre cost
0 2 4 6 8 10 12 14 16
$0
$10,000,000
$20,000,000
$30,000,000
$40,000,000
$50,000,000
$60,000,00...
5000 x =
1 x
With Greener SearchLW
Enjoy!
Greener Search
Greener Search
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Greener Search

  1. 1. Greener Search
  2. 2. 1 cup of tea = 10 gram CO2 (boiling 250 ml water)
  3. 3. “Performing two Google searches from a desktop computer can generate about the same amount of carbon dioxide as boiling a kettle for a cup of tea, according to new research.” (The Sunday Times)
  4. 4. 2 x = 1 x (The Sunday Times)
  5. 5. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 0 10 20 30 40 50 60 70 Google searches per day average: 25 #searches/day
  6. 6. But maybe you're an espresso person ...
  7. 7. However ... the original Sunday Times article was factually incorrect
  8. 8. 25 x = 1 x
  9. 9. 6 x = 1 x
  10. 10. So ... no big deal?
  11. 11. Google handles about 1,000,000,000,000 searches per year
  12. 12. To do so, Google deploys an estimated 500,000 servers in about 50 data centre worldwide (these are rough estimates, Google isn't telling)
  13. 13. Note the cooling plants ... Google's data centres in Dalles, Oregon
  14. 14. Each data centre consumes about 50MW Cooling requires most of the power Infrastructure cost is about $22,000/kW Reducing power consumption can result in huge cost savings
  15. 15. Reduce costs, save the planet
  16. 16. We (Leif & Wim) have developed a Greener Search Solution: FPGA-accelerated search
  17. 17. The Sinner: Intel CPU 120W (at least)
  18. 18. The Saviour: Xilinx FPGA 3W (at most)
  19. 19. Implementing IR algorithms on FPGA: 20x faster @ 10% of the power!
  20. 20. Some results
  21. 21. Effect on data centre cost 0 2 4 6 8 10 12 14 16 $0 $10,000,000 $20,000,000 $30,000,000 $40,000,000 $50,000,000 $60,000,000 Total data centre cost 1000 servers, cost accumulated over 15 years Total Cost – no FPGA Total Cost – FPGA FPGA Yearly License License per FPGA Years Cost($)
  22. 22. 5000 x = 1 x With Greener SearchLW
  23. 23. Enjoy!

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