May 2022
Intermediate
240 pages
6h 57m
Japanese
Content preview from 図解まるわかり AWSのしくみ
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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.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.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.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.
152
ここまでクラウドサービスを支えているサーバーやストレージの技術に
関して解説してきました。大量のIT機器の接続を効率的に実行するネット
ワークの仮想化技術もクラウドのサービスを支えています。
基本的な技術の1つとして VLAN（Virtual LAN：仮想 LAN）があります。
VLANは1つの物理的なLANを複数の仮想LAN に分割できます。
仮想サーバーが1台の物理的なサーバーに複数台の仮想サーバーを構築
できるのに近いイメージです。
実際によくある例で考えてみます。ある企業に人事総務部があり、1つ
の組織として1つのLANを構成していました。組織変更で人事部と総務部
に分かれた場合には、従来であればネットワーク機器を追加して2つの
LANにしていたところを、物理的な機器の増設はせず、VLANの設定で仮想
的に2つの LANを作ります（図5-21）。
実際の構築ではVLANの機能を有するスイッチで設定することで実現しま
すが、ネットワーク機器の物理構成の変更をしない前提であれば有効な技術
です。
ソフトウェアを活用した実現
VLANは実用的かつ便利な技術ですが、規格から 4,096個までしか拡張で
きない課題があります。
データセンター内でのIT機器が増えていくとVLANでは拡張の限界が見
えてきます。さらに、データセンター自体を急激なニーズに応じて増やし
ていかなければならないことから、データセンター間での分散配置とその
対応などの高度なネットワーク機能への要求や、細かい機能における高機
能化の要求など、クラウドのデータセンターの拡大や増加でさらなる技術 ...
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Read now
Unlock full access
More than 5,000 organizations count on O’Reilly
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.