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Holly Cummins
Senior Principal Software Engineer, Quarkus
@[email protected]
Making IT
Greener
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Uh oh.
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@holly_cummins #RedHat
Sources:
https://www.greenit.fr/wp-content/uploads/2019/11/GREENIT_EENM_etude_EN_accessible.pdf
https://ourworldindata.org/ghg-emissions-by-sector
The digital world creates
more carbon emissions
than aviation.
Image: labs.openai.com
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@holly_cummins #RedHat
We have solutions.
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Step 1
Electricity source
Photo by Marcos Assis on Unsplash
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@holly_cummins #RedHat
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@holly_cummins #RedHat
Look at the sustainability information
before choosing a hosting region.
Choose a cloud provider who make this easy.
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@holly_cummins #RedHat
Step 2:
The four vowels
elasticity
utilisation
efficiency
utility
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Photo by Giovanna Gomes on Unsplash
Utility: does it make me happy?
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Utilisation:
how much of the
capacity am I
using?
Photo by engin akyurt on Unsplash
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In many IT systems,
utilisation is very low
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Elasticity:
if I need less, can
I scale down?
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@holly_cummins
#RedHat
Elasticity
We used to
leave our applications
running all the time.
When
we scripted
turning them off at
night, we reduced
our cloud bill by
30%.
@darkandnerdy, Chicago DevOpsDays
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Efficiency:
can I do more
with the same
resources?
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Does the tech stack
make a difference?
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Does programming
language make a
difference?
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No content
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What about
framework?
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@holly_cummins #RedHat
Setup:
• REST + CRUD
• large heap
• RAPL energy measurement
• multiple instances to support high load
Assumptions:
• US energy mix
Source: John O’Hara
climate impact of framework choice
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@holly_cummins #RedHat
“No-regrets” solutions
Climate solutions can make everything better.
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@holly_cummins #RedHat
The double-win
Turning things off saves a lot of money
Renewable energy is a lot cheaper
@[email protected]. #RedHat
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