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Dyn VP of Technical Operations Dave Connors gave a talk at the 2013 Structure/GigaOM event on the principle behind dark architecture and how it applies to scaling a technology company. Watch the video and get more info here: http://gigaom.com/2013/06/20/making-it-change-less-scary-using-dark-architecture/
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Dark Architecture & How to Forklift Upgrade Your Infrastructure with Zero Downtime
Dave ConnorsVP, Technical Operations, Dyn
@daveconnors from @DynInc at #structureconf
Problem We Are Trying To Solve
InputsBlack Magic
(Your Current System Architecture)Outputs
Different Black Magic (Your New System Architecture)
Inputs
InputsInputs
Outputs
OutputsOutputs
Scalex10, x102, etc.
Performance(t2 - t0) <= (t1 - t0)
t1
t2
t0
t0
CouplingTight -> Loose
@daveconnors from @DynInc at #structureconf
Dark Architecture• A way of thinking about, and technical
approach to, solving the scale/performance/coupling problem while enabling the business to succeed and keeping (some) of your hair
• Break big problems into smaller problems• We stand on shoulders of giants– Fowler, Amazon, Netflix, etc.@daveconnors from @DynInc at #structureconf
High Level of Dark Architecture• Legacy approach: Flag Day Upgrade/Deploy– 3 month project -> 6 months, flag day upgrade– “all hands on deck”, cross fingers, fight fires, FML…
• Dark architecture– Prioritize by “flows” through system– Run legacy and dark architectures in parallel– Two inputs, two outputs, throw one away
@daveconnors from @DynInc at #structureconf
Legacy Approach: Start
Input
Legacy System
100% of functionality enabled
100% of functionality consumed
Output
New System
0% of functionality enabled
0% of functionality consumed
Legacy Approach: Flag Day!
Input
Legacy System
100% of functionality enabled
0% of functionality consumed
Output
New System
100% of functionality enabled
100% of functionality consumed
Legacy Approach: Flag Day!
Input
Legacy System
100% of functionality enabled
0% of functionality consumed
Output
New System
100% of functionality enabled
100% of functionality consumed
Dark Architecture Approach
@daveconnors from @DynInc at #structureconf
Dark Architecture: Start
Input
Legacy System
100% of functionality enabled
100% of functionality consumed
Output
New System
0% of functionality enabled
0% of functionality consumed
InputOutput
Dark Architecture: Throw One Away
Input
Legacy System
100% of functionality enabled
100% of functionality consumed
Output
New System
2% of functionality enabled
2% of functionality consumed
InputOutput
Dark Architecture: Shift Flows
Input
Legacy System
100% of functionality enabled
98% of functionality consumed
Output
InputOutput
New System
2% of functionality enabled
2% of functionality consumed
Dark Architecture: Business Choice
Input
Legacy System
100% of functionality enabled
80% of functionality consumed
Output
New System
20% of functionality enabled
20% of functionality consumed
InputOutput
Customer impact over elegant system diagrams
• Your customers are not paying you to have pretty whiteboards of elegant system architectures
• Your customers are paying you to make their pain go away. This gets priority.
• Option to continue system migration
@daveconnors from @DynInc at #structureconf
Questions?
Dave ConnorsVP, Technical Operations, Dyn
@daveconnors from @DynInc at #structureconf
