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Erlang for .NET Developers - Erlang Factory

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Mar 27, 2012 - h\p://rvirding.blogspot.com.au/2008/01/virdings-âfirst-ârule-âof-âprogramming.html. âAny suffic

Erlang for .NET Developers OJ Reeves @TheColonial h1p://buffered.io/

Welcome

Why am I doing this?

Why are you here? • Because … • … you’re a .NET hacker. • … or you work with a .NET hacker. • … or your boss paid for your Fcket.

With that in mind …

Why Erlang?

Perfect Use Case

September 2011 … $ netstat -‐an | grep -‐c EST 1016313 That’s 1,016,313 connecFons!

Perfect Use Case

January 2012 … jkb@c123$ sysctl kern.ipc.numopensockets kern.ipc.numopensockets: 2277845 That’s 2,277,845 connecFons!

Perfect Use Case

January 2012 … CPU: 37.9% user, 0.0% nice 13.6% system, 6.6% interrupt 41.9% idle Mem: 35G Active, 14G Inact, 18G Wired 4K Cache, 9838M Buf, 27G Free

What’s the goal? • Highlight “sore” points in .NET. • Ponder Erlang as an alternate. • Dispel some FUD. • Show that integraFon is easy.

Let’s start with … Virding’s First Rule of Programming …

“Any sufficiently complicated concurrent program in another language contains an ad-‐hoc, informally-‐specified, bug-‐ridden, slow implementaFon of half of Erlang.”

h1p://rvirding.blogspot.com.au/2008/01/virdings-‐first-‐rule-‐of-‐programming.html

Ask yourself …

Why not C#? Wrong quesFon!

Ask yourself …

Why not F#? Wrong quesFon!

Which question?

Why not CCR? (CoordinaFon & Concurrency RunFme)

What about … •  •  •  • 

Parallel Extensions? Task Parallel Library? ‘async’ keyword? … “Yet another Concurrency A1empt”

Key facets of Erlang • Fault-‐tolerance is king. • Concurrency is easier. • DistribuFon is almost the same as concurrency.

What is it made of? • Erlang – the language. • OTP • Open Telecom Plalorm. • The libraries / Pa1erns & PracFces.

• ERTS • Erlang RunTime System. • More of an OS than a VM.

• Even has its own built-‐in DB!

And guess what …

It runs on Windows!

And guess what …

It runs on Windows! • Truly cross plalorm. • Simple installer. • R15 brings x64.

Erlang in a Tweet Erlang: a ba1le-‐ hardened, X-‐plalorm, funcFonal lang that makes wriFng reliable, concurrent, distributed systems a joy.

But who uses it? Good enough for them? Good enough for you!

Sweet Spot -‐ Language Pa1ern matching à awesome! case { YourMove, TheirMove } of { rock, paper } -‐> lose; { paper, scissors } -‐> lose; { scissors, rock } -‐> lose; { _Move, _Move } -‐> draw; _ -‐> win end.

Sweet Spot -‐ Language Bit syntax à awesome! = Pixel.