Ce contenu n'est pas disponible dans la langue sélectionnée.

1.2. Logical Volumes


Volume management creates a layer of abstraction over physical storage, allowing you to create logical storage volumes. This provides much greater flexibility in a number of ways than using physical storage directly. With a logical volume, you are not restricted to physical disk sizes. In addition, the hardware storage configuration is hidden from the software so it can be resized and moved without stopping applications or unmounting file systems. This can reduce operational costs.
Logical volumes provide the following advantages over using physical storage directly:
  • Flexible capacity
    When using logical volumes, file systems can extend across multiple disks, since you can aggregate disks and partitions into a single logical volume.
  • Resizeable storage pools
    You can extend logical volumes or reduce logical volumes in size with simple software commands, without reformatting and repartitioning the underlying disk devices.
  • Online data relocation
    To deploy newer, faster, or more resilient storage subsystems, you can move data while your system is active. Data can be rearranged on disks while the disks are in use. For example, you can empty a hot-swappable disk before removing it.
  • Convenient device naming
    Logical storage volumes can be managed in user-defined and custom named groups.
  • Disk striping
    You can create a logical volume that stripes data across two or more disks. This can dramatically increase throughput.
  • Mirroring volumes
    Logical volumes provide a convenient way to configure a mirror for your data.
  • Volume Snapshots
    Using logical volumes, you can take device snapshots for consistent backups or to test the effect of changes without affecting the real data.
The implementation of these features in LVM is described in the remainder of this document.
Red Hat logoGithubRedditYoutubeTwitter

Apprendre

Essayez, achetez et vendez

Communautés

À propos de la documentation Red Hat

Nous aidons les utilisateurs de Red Hat à innover et à atteindre leurs objectifs grâce à nos produits et services avec un contenu auquel ils peuvent faire confiance.

Rendre l’open source plus inclusif

Red Hat s'engage à remplacer le langage problématique dans notre code, notre documentation et nos propriétés Web. Pour plus de détails, consultez leBlog Red Hat.

À propos de Red Hat

Nous proposons des solutions renforcées qui facilitent le travail des entreprises sur plusieurs plates-formes et environnements, du centre de données central à la périphérie du réseau.

© 2024 Red Hat, Inc.