Nodevember, 2015-11-15
This is not a talk about code
This is about architecture
Service Oriented Architecture
- What is it
- Why use it
- Issues to avoid
- Why node is good at SOA
- How npm uses SOA
Part 1: what is SOA?
SOAs are a distributed system
Distributed systems feature:
- Concurrency
- No global clock
- Independent components
What about microservices?
Part 2: advantages of SOA
A: architectural
B: organizational
#1: Efficiency
#2: scalability
#3: tunable redundancy
#4: faster debugging
#5: robustness
#6: cheaper
Organizational advantages
Conway's Law in reverse
#1: simpler systems are simpler
#2: isolation simplifies architecture
#3: smaller systems allow for smaller teams
Team communication is N to infinity
#4: small teams have stronger ownership
Strong ownership means better code
Part 3: Issues with SOA
#1: failure modes
1 x 0.01 = 1% chance of failure
Chances of 100 boxes failing all at once?
0.01^100 = 0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001%
Chances of 1 of 100 boxes failing on any given day?
0.01*100 = 100%
This is a tradeoff that's usually worth it
#2: redundancy is not optional
#3: automation is essential
#4: deployments become more complex
#5: isolated services also isolate your data
#6: shared logic
#7: distributed systems are hard
First conclusion:
Monoliths are better for v1 systems
SOAs are better as v2 systems
Part 4: why node is great at SOA
#1: Node is inherently good
at writing web services
#2: small modules make for efficient microservices
#3: node and npm make shared logic easier
and now, a shameless product plug
But wait! there's more!
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Part 5: npm as SOA
What is npm?
4 things:
- CLI
- Registry
- www
- On-Site
One thing
One big, complicated thing
The CLI
The Registry
More registry
www
npm On-Site
Service re-use
npm install policies
Future directions for npm's SOA
Ecosystems
Second conclusion: this is awesome
- SOA is pretty good
- node and npm make SOA easier
- npm's SOA is pretty sweet
Thank you!
laurie@npmjs.com
@seldo on Twitter
npm booth right now
Nodevember: npm and soa
By seldo
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