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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クラウドといっても、選定するクラウドベンダーや利用サービスによっ
てクラウドベンダーと利用者の責任範囲が異なります（図10-7）。
まず、システムの特性に合わせてプライベートクラウドかパブリックク
ラウドを選びます。オンプレミスのように自社のみで利用したい場合はプ
ライベートクラウド、複数企業と共有してもよい場合はパブリッククラウ
ドを選びます。加えて、コンサルティング、導入、運用支援の一連の流れ
についてサービス提供可否もあわせて確認して選定する必要があります。
次に、利用サービスの選定になります。パブリッククラウドにはIaaS
（Infrastructure as a Service）、PaaS（Platform as a Service）、SaaS
（Software as a Service）の 3 種類のサービス形態があります。一般的に
は、IaaSを利用する場合、ハードウェアと仮想化基盤はクラウドベンダー
の責任、それら以外はすべて利用者側の責任になります。PaaSを利用す
る場合は、利用者側がデータとアプリケーションについて責任を持ちま
す。さらに、SaaSを利用する場合は、利用者側がデータのみに対して責
任を持ちます。サービスの利用形態以外に、サービスレベル（SLA：
Service Level Agreement・10-7 参照）を考慮してサービスを選定する必
要があります。サービスレベルの測定可能な指標としてよくあるのは稼働
率、遅延時間、障害から復旧までの時間です ...
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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.