GenStage and Flow - José Valim (Lambda Days 2017)

www.lambdadays.org/lambdadays2...
José will explore the rationale and design decisions behind GenStage and Flow, two abstractions that have been researched and now implemented in the Elixir programming with a focus on back-pressure, concurrency and data processing.

[@AlexanderBuch]

Beautiful talk ;)
Elixir really is crazy cool and José became my hero for all the work he has done!

[@yogodoshi]

So much enthusiasm, you can feel the love Jose has when he is speaking ❤️

[@goofansu]

José is so good at explaining complex concepts, thank you!

[@abulasarsayyad6839]

Wow.. just wow. How did I miss this thing till now.

[@AndreasDonig]

Great talk. Thank you for sharing!

[@seankemplay78]

Fantastic talk. Great communicator, great concept.

[@haystackdmilith]

Glad I've been there :)

[@sondiek]

Great talk! Really cool design.

[@elchemista]

Great talk ! thank you

[@arhyth]

what’s the title of the paper Jose brings up near the end of the talk regarding concurrency on single machine, “Cost...” ?

[@arhyth]

found it linked from a plataformatec blog
paper:
www.frankmcsherry.org/assets/COST.pdf
plataformatec article:
blog.plataformatec.com.br/2017/03/small-data-with-elixir/

[@dougb70]

the problem is that the difficult concepts are trivialized. Like how do you ensure that the "ares" are always going to the same node?

[@jameshulse2]

Hashing

[@50Kudos]

The partition function is a mapper 42:30 and all producers know all consumers in advance. For example if your map function is just casting a value to boolean, the mapper is simply a simple case expression: [true -> state A, false -> state B]