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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86
LVMとは、Logical Volume Manager の頭文字を取った略称で、Linux な
どのUNIX 系 OSで利用できるストレージ仮想化方式です。
複数のストレージやストレージ内に作ったパーティションを束ねて、論
理的な1 つのボリュームに見せる技術です。実態は複数のストレージで構
成されていますが、利用者からは1 つのパーティションとしてアクセスで
きます（図4-6）。
物理ストレージのサイズを超えたボリュームを作れることに加え、作成
した論理ボリューム（LV）ごとに異なるファイルシステムでフォーマッ
トをすることができます。また、論理ボリュームの容量は、システムを停
止せず動的に増やしたり減らしたりすることができます。ボリューム同士
をペアリングしてミラー（冗長化、バックアップ）を行う機能もありま
す。
ダイナミックディスクやダイナミックボリューム
ダイナミックディスクとは、Windows 2000 で導入されたストレージ仮
想化方式の1 つです。以前からあるパーティション単位の管理方式はベー
シックディスクと呼ばれます（図4-7）。
LVM と同様に、複数のストレージで構成される非連続の領域を1 つの論
理的なボリューム（ダイナミックボリューム）とする技術です。次のよう
な複数のタイプから選択できます。
●
ミラーボリューム……コピーを作成して信頼性を向上
●
ストライプボリューム……複数ディスクにI/O を分散させ性能向上
●
スパンボリューム……2 台以上のストレージを結合
●
RAID ...
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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.