May 2024
Intermediate
248 pages
6h 59m
Japanese
Content preview from 図解まるわかり 仮想化のしくみ
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Cloudfl areのCloudfl are Workers（12-4 参照）はブラウザで動作してい
るのではなく、CDNというエッジ側のサーバーサイドで動作しています。
単一機能をモジュール化してサーバーで動作させるサーバーサイドWasm
は、コンテナが目指しているものと同じです（図12-13）。
Dockerの創業者であるソロモン・ハイクスはX（旧 Twitter）で、「2008
年にWasm＋WASIが存在していれば、Dockerを作成する必要はなかった
（中略）サーバー上の WebAssemblyはコンピューティングの未来です。標
準化されたシステムインタフェースが欠けていた部分でした」と述べてい
ます。2008 年当時、WasmやWASIは存在していませんでしたが、アプリ
ケーションの実行環境をセキュアに分離する考え方はDokcerと同じであ
り、実現したいこととそのしくみは似ています（図12-14）。2024 年 3 月
時点で最新となる WASI Preview 2 では、一般的に利用されるシステムコ
ールの一部にとどまっていますが、WASIが持つシステムコールのインタ
フェースを充実させることで活用が進んでいくと想定されます。
コンテナは既存のライブラリ（システムコールを含む）の活用が可能で
あるため、Wasmと比較してメリットがあります。このような状況でも
Wasmが「サーバー上の WebAssembly はコンピューティングの未来」と
いわれるのは、Dockerコンテナと比べて ...
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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.