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
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
Reactor pattern - Wikipedia
The reactor software design pattern is an event handling strategy that can respond to many potential service requests concurrently. The pattern's key component is an event loop, running in a single thread or process, which demultiplexes incoming requests and dispatches them to the correct request handler.[1] By relying on event-based mechanisms rather than blocking I/O or multi-threading, a reacto
APR Networking & the Reactor Pattern
APR Networking & the Reactor Pattern By Ethan Q. McCallum, October 03, 2006 The Apache Portable Runtime is a C-based API that provides abstractions ranging from memory management to telling time. Ethan is a freelance technology consultant specializing in C++, Java, and Linux. He can be reached at [email protected] Source code is said to be portable if it compiles and runs in several environments w
APR Networking & the Reactor Pattern
APR Networking & the Reactor Pattern By Ethan Q. McCallum, October 03, 2006 The Apache Portable Runtime is a C-based API that provides abstractions ranging from memory management to telling time. Ethan is a freelance technology consultant specializing in C++, Java, and Linux. He can be reached at [email protected] Source code is said to be portable if it compiles and runs in several environments w
Thread per connection vs Reactor pattern (with a thread pool)?
I want to write a simple multiplayer game as part of my C++ learning project. So I thought, since I am at it, I would like to do it properly, as opposed to just getting-it-done. If I understood correctly: Apache uses a Thread-per-connection architecture, while nginx uses an event-loop and then dedicates a worker [x] for the incoming connection. I guess nginx is wiser, since it supports a higher co
What is the difference between event driven model and reactor pattern?
The reactor pattern is more specific than "event driven programming". It is a specific implementation technique used when doing event driven programming. However, the term is not used with much accuracy in typical conversation, so you should be careful about using it and expecting your audience to understand you, and you should be careful in how you interpret the term when you encounter its use. O
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