May 2019
Intermediate to advanced
464 pages
9h 22m
Japanese
Content preview from Node.jsデザインパターン 第2版
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400
11
章 メッセージ通信と統合
分散（ファンアウト） 集約（ファンイン）
図11-14 パイプラインの構成
パイプラインによって複雑な処理アーキテクチャを同期的「リクエスト
/
リプライ」通信の負担なく構
築でき、多くの場合、遅延が小さくしスループットが高くなります。図11-14では、メッセージが複数
のワーカーに分散し（ファンアウト）、他の処理ユニットへ転送されてから通常「シンク」と呼ばれる単
一のノードに集合する様子がわかります。
この節では、この種のアーキテクチャの構成要素に焦点を合わせ、もっとも重要なバリエーションで
ある、ピアツーピア型とブローカ型を分析します。
パイプラインをタスク分散パターンと組み合わせたものは「並列パイプライン」とも呼ば
れます。
11.3.1
ØMQ
のファンアウト
/
ファンイン・パターン
ピアツーピア型分散アーキテクチャを構成するための
ØMQ
のいくつか機能は既に見てきました。前
の節では、
PUB
ソケットと
SUB
ソケットを使って単一のメッセージを複数のコンシューマに届けました。
今度は、
PUSH
および
PULL
と呼ばれるもう一対のソケットを使って並列パイプラインを構築する方法を
見ます。
11.3.1.1
PUSH/PULL
ソケット
直観的に言えば、
PUSH
ソケットはメッセージの「送信」用、
PULL
ソケットは「受信」用に作られてい
ます。これは自明の組み合わせに思えるかもしれませんが、これらには一方向通信システムの構築に
最適な次のような特徴があります。
●
どちらのソケットも「接続 ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.