tce introduction (scalability with scala and akka)

Scala-bility

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Puzzle: what is on the Y axis???

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OMG, these MHzes don’t grow

anymore :(martes 10 de septiembre de 13

But imagine a beowulf cluster of

these!!!martes 10 de septiembre de 13

Is it possible to handle multiple tasks and not suffer?!

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DEMO

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We do it for ages!UNIX pipes connect parallel processes

easily:* Deterministic* Composable

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Why is it so easy to be parallel with *nix CLI?

Designed to be parallel from the ground up

Designed to be functional from the ground up

Autonomic composable units of execution

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Pipe example in Java

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Are we there yet?Reliability?

Availability?Diagnostics?Distribution?

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Doing it in Java built-inssynchronize, volatile

Collections.synchronized*

java.util.concurrent

java.nio

fork/join

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High-level tools for Java async

Camel

Spring Integration

GridGain

Akka

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Today we cover only two

Akka: you can stay in Java and scale vertically/horizontally - transparently

Scala: being functional allows to be parallel - easily

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Scala: being functional

High order functions

Immutable data

Referential transparency

Lazy evaluation

Recursion (RecursiveAction, anyone?)

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Scala: if you’re functional, you can be

parallel

import Math._

val r = 0 until 10000000 def f(x: Int) = log10 (pow(3,x *sin(x))) val m = r. map ( f )

r. forall ( i=> f(i)==m(i) ) //10seconds r. par. forall ( i=> f(i)==m(i) ) //5seconds

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Same JVM, different languagesYou don’t have to choose. You can mix

them in the same project.

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Right guys to follow ...Martin Odersky

Rod JohnsonJonas Bonér

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... they already use it in

production

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Links

http://www.slideshare.net/djspiewak/high-wizardry-in-the-land-of-scala

http://www.forbes.com/sites/quentinhardy/2011/05/12/names-you-need-to-know-scala-and-typeface/

http://www.slinnbooks.com/books/futures/

http://mandubian.com/2012/08/27/understanding-play2-iteratees-for-normal-humans/

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