I/O待ちを緩和させるのに効果的な Reactor パターン - I am bad at math
クラウド上で動作するプログラムを組んでいく際、スケールすることを狙って多くのロジックがデカップリングされ、複数のサーバに分散されることと思いますが、そこで顕著になってくるボトルネックの一つがネットワークなどのI/O待ちです。 このI/O待ちを減少させるのに効果的なのが Reactor パターン。 このパターン自体は特に目新しいものでもないのですが、近年のクラウドブームで再び脚光を浴びそうなので自分の備忘録もかねて紹介します。 Reactor パターン http://en.wikipedia.org/wiki/Reactor_pattern この Reactor パターンはどういった場合に使用するかというと 複数のI/O待ちが想定される場合 というのが代表格のようです。今回はネットワークI/Oを想定していますが、データベースへの問い合わせに時間がかかる際にも有用となります。 例としてクローラ
アクターモデル - GIOの日記
Erlang Land を読んでErlangを学んだ。 Erlangの並列処理を学ぶことでアクターモデルの理解ができた！ 概念的に理解できてなかったScalaのActorライブラリも読み書きができるようになりました。 Erlangの並列版フィボナッチをScalaで書いてみました。 import scala.actors._ class FibActor(var name:String) extends Actor { def act = { receive { case i:Int => println(name + ": " + fib(i)) } } def fib(n:Int):Int = { n match { case 0 => 1 case 1 => 1 case _ => fib(n - 1) + fib(n - 2) } } } object ActorTest { def
GitHub - devsisters/cine: Actor model for golang
Actor model for golang. This project aims to implement actor model from erlang to Go. It attempts to add a concept of Pid which is universal identifier for actors. Actor supports Call which is a syncronous method call. Cast which is asyncronous method call ignoring all errors. Actors can communicate with other actors using Call and Cast. Remote actors are treated same as local actors. This project
Akso de la Malbono on Twitter: "C++の最近の必読書を3冊挙げるなら"Pattern-Oriented Software Architecture Vol.2","Java Concurrency in Practice","The Art of Multiprocessor Programming"ですね（ぉ"
C++の最近の必読書を3冊挙げるなら"Pattern-Oriented Software Architecture Vol.2","Java Concurrency in Practice","The Art of Multiprocessor Programming"ですね（ぉ
GitHub - codepr/tasq: A simple task queue implementation to enqeue jobs on local or remote processes.
Very simple distributed Task queue that allow the scheduling of job functions to be executed on local or remote workers. Can be seen as a Proof of Concept leveraging ZMQ sockets and cloudpickle serialization capabilities as well as a very basic actor system to handle different loads of work from connecting clients. Originally it was meant to be just a brokerless job queue, recently I dove deeper o
Message Passing and the Actor Model
This is a description that will be the subtitle. (59 min read) Introduction Message passing programming models have essentially been discussed since the beginning of distributed computing and as a result message passing can be taken to mean a lot of things. If you look up a broad definition on Wikipedia, it includes things like Remote Procedure Calls (RPC), and Message Passing Interface (MPI). Add
Get to know the Actor Model
September 4, 2017 The Actor Model was proposed in the '70s by Carl Hewitt as a conceptual model to deal with concurrent computation. There are a good amount of implementations out there in the wild, from complete programming languages to libraries and frameworks; the most popular ones being Erlang/Elixir and Akka. Every implementation has its own particularities, but the foundational concepts rema
Event Bus Implementation(s) | HackerNoon
Too Long; Didn't ReadEvent driven architecture pattern is a distributed asynchronous architecture pattern to create highly scalable reactive applications. The pattern suits for on every level application stack from small to complex ones. The main idea is delivering and processing events asynchronously. Event driven architecture pattern is a distributed asynchronous architecture pattern to create h
Explain "Leader/Follower" Pattern
I can't seem to find a good and accessible explanation of "Leader/Follower" pattern. All explanations are simply completely meaningless as in 1. Can anyone explain to the the mechanics of how this pattern works, and why and how it improves performance over more traditional asynchronous IO models? Examples and links to diagrams are appreciated too.
Kim Woo-Bin, Korean Actor and Model, Diagnosed With Rare Cancer
Kim Woo-Bin, Korean Actor and Model, Diagnosed With Rare Cancer Kim Woo-Bin, South Korean actor and model, has been diagnosed with a rare form of cancer, his talent agency SidusHQ confirmed in a statement on Tuesday (May 23). The Uncontrollably Fond star, who starred in breakout roles on KBS drama School 2013 and 2013's majorly popular The Heirs, is now battling nasopharyngeal cancer, a rare head
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How is the actor model used?
Eddie Murphy and Paige Butcher. Comedian actor and Australian model Stock Photo: 152513612 - Alamy
GitHub - actor-framework/actor-framework: An Open Source Implementation of the Actor Model in C++
GitHub - mloskot/concrtextras: Code samples for the Concurrency Runtime and Parallel Pattern Library in Visual Studio 2010 and 2012
http://www.devote.se/blacukbegwa/glamour-model-dating-actor-31076549
https://www.guru.com/portfolio/actor-dating-victorias-secret-model/635825
http://ondakitzged.unblog.fr/2018/03/13/victoria-secret-model-dating-actor/
https://www.gitbook.com/book/taicopitfind/dating-taicopitfind/discussions/38
https://www.gitbook.com/book/tilirede/dating-tilirede/discussions/7
GitHub - actix/actix: Actor framework for Rust.
