April 2019
Intermediate to advanced
200 pages
2h 16m
Japanese
Content preview from 分散システムデザインパターン ―コンテナを使ったスケーラブルなサービスの設計
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10章ワークキューシステム
バッチ処理の最も単純なかたちがワークキューです。ワークキューシステムには、処理されるワークアイテム（タスク）のかたまり（バッチ）があります。それぞれのワークアイテムは他のワークアイテムからは独立していて、処理する際に相互のやり取りはありません。ワークキューシステムのゴールは通常、一定時間内にそれぞれのワークアイテムを実行することです。ワーカは、ワークアイテムが処理されるよう、スケールアップしたりスケールダウンしたりします。一般的なワークキューの図が図10-1です。
図10-1 一般的なワークキュー
10.1 汎用ワークキューシステム
ワークキューは、分散システムパターンの強力さを示すぴったりの方法です。ワークキューのほとんどのロジックは実際に処理されるワークアイテムとは完全に独立していて、多くの場合ワークアイテムの生成元も独立しています。これを図示したのが、図10-1です。この図をもう1度確認して、ライブラリコンテナの集まりによって提供できる機能を探してみて下さい。すると、コンテナ化されたワークキューでは、多くの実装がいろいろなユーザによって共有できることが分かってきます。これを示したのが、図10-2です。
図10-2 図10-1と同じワークキューに再利用可能なコンテナを利用した例。再利用可能なシステムコンテナは白、ユーザが作成するコンテナはグレーで表示 ...
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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.