The Zen Of Erlang
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A code-free presentation about the core principles and philosophies of Erlang, explaining how the whole is greater than the sum of its parts. This presentation takes a perspective rooted in showing the reasoning between each of the building blocks (message-passing, isolated processes, links and monitors, and so on), and shows how they can be assembled together to create larger systems where interactions between subsystems take a front seat in defining the fault tolerance of these systems.
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The Zen Of Erlang
- 1. 1 FRED HEBERT THE ZEN OF ERLANG
- 4. Eureka Presentation 4 CONTROLLED BURNS FIGHT FIRE WITH FIRE
- 10. 10 LET IT CRASH
- 12. 12 Old New 1 13 32 Old New 1 3 1 2 3 Old New 1 1 13 2 3 SUPERVISORS strategies
- 13. 13 WHY RESTARTING WORKS HEISENBUGS & FRIENDS
- 14. 14 REPEATABLE TRANSIENT CORE FEATURE EASY HARD SECONDARY FEATURE EASY, OFTEN OVERLOOKED HARD Why restarting works EASE OF FINDING BUGS IN DEVELOPMENT
- 15. 15 REPEATABLE TRANSIENT CORE FEATURE SHOULD NEVER ALL THE TIME SECONDARY FEATURE PRETTY OFTEN ALL THE TIME Why restarting works BUGS THAT HAPPEN IN PRODUCTION
- 16. 16 REPEATABLE TRANSIENT CORE FEATURE NO YES SECONDARY FEATURE DEPENDS YES Why restarting works BUGS HANDLED BY RESTARTS
- 17. 17 “I LIKE STATICALLY TYPED LANGUAGES, AND I RESTART MY DAEMON AFTER UNHANDLED EXCEPTIONS. WHAT IS ERLANG GONNA WIN ME ON FAULT TOLERANCE?” - FORUM USER “Notorious b.s.d.”
- 18. 18 ROOT TALLY DISTRICT QUEBEC ONTARIO … COUNT OCR C_OCR WORKER POOL STORAGE CACHE POOL WORKER POOL WORKER POOL WORKER WEB SERVER LIVE REPORTS SESSIONS … WEB WORKER WEB WORKER WEB WORKER SUPERVISION TREES
- 19. 19 ROOT TALLY DISTRICT QUEBEC ONTARIO … COUNT OCR C_OCR WORKER POOL STORAGE CACHE POOL WORKER POOL WORKER POOL WORKER WEB SERVER LIVE REPORTS SESSIONS … WEB WORKER WEB WORKER WEB WORKER SUPERVISION TREES
- 20. 20 ROOT TALLY DISTRICT QUEBEC ONTARIO … COUNT OCR C_OCR WORKER POOL STORAGE CACHE POOL WORKER POOL WORKER POOL WORKER WEB SERVER LIVE REPORTS SESSIONS … WEB WORKER WEB WORKER WEB WORKER SUPERVISION TREES REPORT_APP TALLY_APP STORAGE_APP
- 21. 21 but probably not… HOPEFULLY SLEEP AT NIGHT
- 23. 23 DANGER ZONE laid-back area The risk of getting comfortable WELL-DEFINED OPERATING CONDITIONS ERODE OVER TIME
- 25. Eureka Presentation 25 HOW THINGS INTERACT IN A NUTSHELL
- 27. 27 Totally advertising free books to you all QUESTIONS? @MONONCQC