Pesquisar

Este conteúdo não está disponível no idioma selecionado.

2.3. LVM Architecture Overview

download PDF
For the Red Hat Enterprise Linux 4 release, the original LVM1 logical volume manager was replaced by LVM2, which has a more generic kernel framework than LVM1. LVM2 provides the following improvements over LVM1:
  • flexible capacity
  • more efficient metadata storage
  • better recovery format
  • new ASCII metadata format
  • atomic changes to metadata
  • redundant copies of metadata
LVM2 is backwards compatible with LVM1, with the exception of snapshot and cluster support. You can convert a volume group from LVM1 format to LVM2 format with the vgconvert command. For information on converting LVM metadata format, see the vgconvert(8) man page.
The underlying physical storage unit of an LVM logical volume is a block device such as a partition or whole disk. This device is initialized as an LVM physical volume (PV).
To create an LVM logical volume, the physical volumes are combined into a volume group (VG). This creates a pool of disk space out of which LVM logical volumes (LVs) can be allocated. This process is analogous to the way in which disks are divided into partitions. A logical volume is used by file systems and applications (such as databases).
Figure 2.1, “LVM Logical Volume Components” shows the components of a simple LVM logical volume:
LVM Logical Volume Components

Figure 2.1. LVM Logical Volume Components

For detailed information on the components of an LVM logical volume, see Chapter 3, LVM Components.
Red Hat logoGithubRedditYoutubeTwitter

Aprender

Experimente, compre e venda

Comunidades

Sobre a documentação da Red Hat

Ajudamos os usuários da Red Hat a inovar e atingir seus objetivos com nossos produtos e serviços com conteúdo em que podem confiar.

Tornando o open source mais inclusivo

A Red Hat está comprometida em substituir a linguagem problemática em nosso código, documentação e propriedades da web. Para mais detalhes veja oBlog da Red Hat.

Sobre a Red Hat

Fornecemos soluções robustas que facilitam o trabalho das empresas em plataformas e ambientes, desde o data center principal até a borda da rede.

© 2024 Red Hat, Inc.