The deck, without the notes for my Djangocon talk

1. Planet friendly Web
Development with Django
Chris Adams
Djangocon Europe 2017

2. Chris Adams:
@acdha
Successful, prolific, well
known django developer
Chris Adams:
@mrchrisadams
Not this guy… This guy
Environmentally focussed
web generalist

3. A.M.E.E. (Avoid Mass
Extinction Engine) - CO2
calculation APIs
Loco2 - Low CO2 travel
in Europe by train
TeaLight - Low CO2
cups of tea, with
demand response
My Background:

4. Djangocon 2017 - Planet Friendly Web Development@mrchrisadams

5. Djangocon 2017 - Planet Friendly Web Development@mrchrisadams@mrchrisadamsWhat can a technologist do about climate change: worrydream.com/climatechange

6. Djangocon 2017 - Planet Friendly Web Development@mrchrisadams
http://www.iea.org/media/news/2017/GlobalCarbonEmissions2.png
http://www.iea.org/newsroom/news/2017/march/iea-finds-co2-emissions-flat-for-third-straight-year-even-as-global-
economy-grew.html

7. Djangocon 2017 - Planet Friendly Web Development@mrchrisadamshttp://folk.uio.no/roberan/t/global_mitigation_curves.shtml

8. Djangocon 2017 - Planet Friendly Web Development@mrchrisadams@mrchrisadamsWorld GHG Emissions in 2010 - Analysis by ECOFYS
Source* Greenhouse gas
Coal
25%
Natural Gas
19%
Oil
21%
Waste
0.4%
Sector
Direct
emissions
34.6%
* Greenhouse gases can arise from two sources
N20
7%
CH4
15%
CO2
76%
HFCs & PFCs
2%
Transport
15%
Residential Buildings
11%
Commercial/Public Buildings & Services
7%
Land Use
Change
15%
Industry
29%
7%
6.0%
4.8%
4.3%
1.4%
1.1%
1.0%
10.5%
1.5%
2.6%
10.5%
5.5%
1.4%
1.8%
3.1%
4.4%
10.3%
Other industries
Paper, pulp and printing
Food and tobacco
Non-ferrous metals
Chemical and petrochemical
Iron and steel
Non-metallic minerals
Aviation
Others
Road
Livestock and manure
Agricultural Energy Use
Coal Mining
Oil and gas extraction, refining and processing
Deforestation/Afforestation and Land Use CO2
Agricultural soils
1.3%
1.6%
Landfills
Waste water & othersWaste 3%
Agriculture
Energy Supply
13% 8.3%Energy industry own use & losses

9. Djangocon 2017 - Planet Friendly Web Development@mrchrisadams© 2011-2012 GreenTouch Consortium
2020 ICT Carbon Footprint
820m tons CO2
360m tons CO2
260m tons CO2
2007 Worldwide ICT
carbon footprint:
2% = 830 m tons CO2
Comparable to the
global aviation
industry
Expected to grow
to 4% by 2020
The Climate Group, GeSI
Report “Smart 2020”, 2008
Full report - https://www.slideshare.net/greentouch-org/intro-to-green-touch

10. Djangocon 2017 - Planet Friendly Web Development@mrchrisadams
A mental model for
thinking about this

11. Djangocon 2017 - Planet Friendly Web Development@mrchrisadams
Your Servers
Your Packets
Your Process

12. Your servers
Provider
Provisioning

13. Your servers
Provider:
Where did the power your
servers run on come from?

14. Power quote
From 2017 report - http://www.greenpeace.org/usa/global-warming/click-clean/

15. Your servers
Provision:
How many server resources do
you use? And when?

16. The power of wireless cloud 2013 (CEET - http://www.ceet.unimelb.edu.au/publications)

17. “many workloads are spiky or
drop to zero for extended
periods… applications used in
the workplace may only be
active for 40 of the 168 hours in
a week.”
Adrian Cockroft
@adrianco: AWS, ex Netflix
@mrchrisadams
https://medium.com/@adrianco/evolution-of-business-logic-from-monoliths-through-microservices-to-functions-
ff464b95a44d#.4ap421dwr

18. PaaS:
Higher unit cost in
exchange for
easier scaling

19. FaaS / Serverless:
Even higher unit
cost, to not think
about scaling*
* You still need to obviously, but differently

20. “the technical capabilities of
serverless might not be that
exciting, but the financial side
sure is… Strong financial
incentives for good design
practices, and clear financial
penalties for bad design” Gojko Adzic
@mrchrisadamshttps://gojko.net/2016/08/27/serverless.html

21. When your second biggest cost after
staff is data centres, you have a very
good incentive to care about saving
energy.
@mrchrisadamshttps://deepmind.com/blog/deepmind-ai-reduces-google-data-centre-cooling-bill-40

22. Platform as a Service (PaaS) Functions as a Service
django-configurations
Cloudfoundry: App Autoscaler zappa
Heroku: Autoscaling & LightSwitch chalice
In the Django toolbox

23. Your packets
Lossy changes
Lossless changes

24. http://www.electricitymap.org/

25. “Wireless access network
technologies account for 90% of
total wireless cloud energy
consumption. Data centres account
for only about 9%. The energy
consumption of wireless user
devices is negligible.”
The power of wireless cloud 2013 (CEET - http://www.ceet.unimelb.edu.au/publications)

26. Power quote
The power of wireless cloud 2013 (CEET - http://www.ceet.unimelb.edu.au/publications)

27. https://www.soasta.com/blog/page-bloat-2015-web-performance-monitoring/

28. Power quote
https://performancebudget.io

29. Power quote
https://speedcurve.com (see also sitespeed.io for an OSS take)

30. Your packets
Lossy changes:
How much of what you send is
used by the client?

31. Your packets
Lossless changes:
How efficiently are the bits
sent?

32. Dynamic Static Media
compression
Django middleware &
decorators
Whitenoise, CDNs,
Nginx
CDNs, Nginx
caching
Django middleware &
decorators
Whitenoise, CDNs CDNs, Nginx
JS optimisation
Webpack 2, Google
Closure Compiler (JS)
nginx mod_pagespeed
Image Optimisation ImageOptim, Trimage
easy-
thumbnails.optimise,
nginx mod_pagespeed
Relevant in the Django toolbox

33. There’s much, much more to do, but
starting here can help

34. Thanks!
I’m around all week, and in the
slack channel to chat. Say
hello :)
Chris Adams
@mrchrisadams
productscience.co.uk
https://www.slideshare.net/chris.d.adams

35. Djangocon 2017 - Planet Friendly Web Development@mrchrisadams
Bonus life-changing link:
What can a technologist do about
climate change? - Bret Viktor
worrydream.com/climatechange