Scaling event driven systems: Node.js and GraphQL

@bogdanned Bogdan Nedelcu 1 Scaling event driven systems: Node.js and
GraphQL Principal Software Engineer Node.js Global Summit 05.31.2020

@bogdanned Once upon a time there was ... 2

@bogdanned … a monolith 3

@bogdanned … split into microservices 4

@bogdanned … choreographed by events 5

@bogdanned Event driven designs are focused on system behaviour rather
than structure. 6

@bogdanned Node.js ... … an asynchronous event-driven runtime 7

@bogdanned How does Node scales? 8

@bogdanned Requirements - performant - cost effective - reliable, fail
safe 9

@bogdanned Node performs well when the amount of CPU work
per request is relatively “small”. 10

@bogdanned Scale Horizontally 11

@bogdanned Running more instances of a non performant app is
not cost effective. 12

@bogdanned Scale Vertically 13

@bogdanned What about … building apps that leverage the hardware
more? 14

@bogdanned Node inherits the Event Loop model that made Javascript
successful in the browser. 15

@bogdanned Worker threads 16

@bogdanned 17

@bogdanned Can I use worker threads for everything? 18

@bogdanned Spawning workers is expensive if done frequently. 19

@bogdanned How can I use this with GraphQL? 20

@bogdanned GraphQL subscriptions: - server: push data to client -
clients: listen to real time messages 21

@bogdanned 22

@bogdanned In the real world ... 23

@bogdanned 24

@bogdanned Demo 25

@bogdanned 26

@bogdanned Future work - deployment to cloud - add performance
hooks - set up proﬁling 27

@bogdanned Summing Up - node is a perfect ﬁt for
event driven systems - worker threads improve performance - easily go fullstack with GraphQL 28

@bogdanned thank @you 29

@bogdanned Bogdan Nedelcu Entrepreneurial software engineer with a proven track
record across large IT projects within the ﬁnance and construction industry. 30

Scaling event driven systems: Node.js and GraphQL

Scaling event driven systems: Node.js and GraphQL

Bogdan Nedelcu

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@bogdanned Bogdan Nedelcu 1 Scaling event driven systems: Node.js and

@bogdanned Once upon a time there was ... 2

@bogdanned … a monolith 3

@bogdanned … split into microservices 4

@bogdanned … choreographed by events 5

@bogdanned Event driven designs are focused on system behaviour rather

@bogdanned Node.js ... … an asynchronous event-driven runtime 7

@bogdanned How does Node scales? 8

@bogdanned Requirements - performant - cost effective - reliable, fail

@bogdanned Node performs well when the amount of CPU work

@bogdanned Scale Horizontally 11

@bogdanned Running more instances of a non performant app is

@bogdanned Scale Vertically 13

@bogdanned What about … building apps that leverage the hardware

@bogdanned Node inherits the Event Loop model that made Javascript

@bogdanned Worker threads 16

@bogdanned 17

@bogdanned Can I use worker threads for everything? 18

@bogdanned Spawning workers is expensive if done frequently. 19

@bogdanned How can I use this with GraphQL? 20

@bogdanned GraphQL subscriptions: - server: push data to client -

@bogdanned 22

@bogdanned In the real world ... 23

@bogdanned 24

@bogdanned Demo 25

@bogdanned 26

@bogdanned Future work - deployment to cloud - add performance

@bogdanned Summing Up - node is a perfect ﬁt for

@bogdanned thank @you 29

@bogdanned Bogdan Nedelcu Entrepreneurial software engineer with a proven track