The document introduces Elixir, a functional language that leverages the Erlang VM. It demonstrates building a simple key-value storage server in Elixir using processes, GenServers, and Supervisors to make the server fault-tolerant and able to restart crashed processes. The server is improved in three versions to store state using an Agent and maintain data across restarts. Resources for learning more about Elixir are also provided.

1. 10분안에 훑어보는 Elixir
(매우 간단한 Fault-tolerance server)
박창욱 (syntaxfish@gmail.com)

3. Elixir? Erlang?
http://www.slideshare.net/YuriLeikind/elixir-study-group-kickoff-meetup?qid=e98d1040-0cd1-4e3a-9d33-ffdb0e1d180b&v=default&b=&from_search=41

4. Actor Concurrency Model
http://benjamintan.io/blog/2013/06/25/elixir-for-the-lazy-impatient-and-busy-part-2-processes-101/

5. Elixir
• Elixir is a dynamic, functional language designed for
building scalable and maintainable applications.
• Elixir leverages the Erlang VM, known for running low-
latency, distributed and fault-tolerant systems, while
also being successfully used in web development and
the embedded software domain.
• To learn more about Elixir, check our getting started
guide. Or keep reading to get an overview of the
platform, language and tools. - [www.elixir-lang.org]

6. Elixir
• Elixir is a dynamic, functional language designed for
building scalable and maintainable applications.
• Elixir leverages the Erlang VM, known for running low-
latency, distributed and fault-tolerant systems, while
also being successfully used in web development and
the embedded software domain.
• To learn more about Elixir, check our getting started
guide. Or keep reading to get an overview of the
platform, language and tools. - [www.elixir-lang.org]

7. Elixir
• Elixir is a dynamic, functional language designed for
building scalable and maintainable applications.
• Elixir leverages the Erlang VM, known for running low-
latency, distributed and fault-tolerant systems, while
also being successfully used in web development and
the embedded software domain.
• To learn more about Elixir, check our getting started
guide. Or keep reading to get an overview of the
platform, language and tools. - [www.elixir-lang.org]

8. 라이브 코딩

9. 프로젝트 생성
$ mix new kv --module KV --no-brunch
- config
- config.exs
- lib
- kv.ex
- test
- kv_test.exs
- test_helper.exs
- mix.exs

10. [KV_01] 간단한 Key, Value
저장 서버
https://github.com/haruio/ten_minutes_elixir/tree/master/kv_01

11. GenServer
KV.Store
get(key)
set(key, val)
{key, value}
{key, value}
{key, value}

12. GenServer
KV.Store
get(key)
set(key, val)
del(key)
{key, value}
{key, value}
{key, value}

13. GenServer
KV.Store
get(key)
set(key, val)
del(key)
{key, value}
{key, value}
{key, value}

14. [KV_02] 다시 살아나는 간단한
Key, Value 저장 서버
https://github.com/haruio/ten_minutes_elixir/tree/master/kv_02

15. GenServer + Supervisor
KV.Store
Supervisor
KV.Store
get(key)
set(key, val) {key, value}
{key, value}
{key, value}

16. GenServer + Supervisor
KV.Store
Supervisor
KV.Store
del(key)
{key, value}
{key, value}
{key, value}

17. GenServer + Supervisor
KV.Store
Supervisor
KV.Store
del(key)
{key, value}
{key, value}
{key, value}

18. GenServer + Supervisor
KV.Store
Supervisor
KV.Store
KV.Store

19. [KV_03] 상태를 유지하는 다시 살아
나는 간단한 Key, Value 저장 서버
https://github.com/haruio/ten_minutes_elixir/tree/master/kv_03

20. GenServer + Supervisor + Agent
KV.Store
Supervisor
KV.Store
KV.Store
Stash
get(key)
set(key, val)
get(key)
set(key, val) {key, value}
{key, value}
{key, value}

21. GenServer + Supervisor + Agent
KV.Store
Supervisor
KV.Store
KV.Store
Stash
{key, value}
{key, value}
{key, value}
del(key)

22. GenServer + Supervisor + Agent
KV.Store
Supervisor
KV.Store
KV.Store
Stash
{key, value}
{key, value}
{key, value}
del(key)

23. KV.Store
Supervisor
KV.Store
KV.Store
Stash
{key, value}
{key, value}
{key, value}
del(key)
KV.Store
GenServer + Supervisor + Agent

24. Resources
• Tutorials
• http://elixir-lang.org/
• Books
• Programming Elixir: https://pragprog.com/book/elixir/programming-elixir
• Slack
• https://elixir-lang.slack.com/
• Facebook
• https://www.facebook.com/groups/elixir.korea/
• https://www.facebook.com/groups/elixir.lang/