Encyclopedia of Database Systems

2018 Edition
| Editors: Ling Liu, M. Tamer Özsu

Logical Volume Manager

  • Kazuhisa Fujimoto
Reference work entry
DOI: https://doi.org/10.1007/978-1-4614-8265-9_1345

Synonyms

LVM; Virtual disk manager; Volume set manager

Definition

Logical Volume Manager (LVM) is a kind of storage virtualization. LVM collects one or more disk drives or partitions, creating a storage pool in a host. Furthermore, LVM provides applications with logical volumes consisting of multiple chunks of disk drives or partitions.

Key Points

Figure 1 shows volume manager implementation. LVM implementations often start with physical volume (PVs), which can be disk drives or partitions. PVs are spilt into chunks called physical extents (PEs). Some LVM implementations have PEs of a uniform size; others have variable-sized PEs that can be split and merged at will.
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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Hitachi Ltd.TokyoJapan

Section editors and affiliations

  • Masaru Kitsuregawa
    • 1
  1. 1.Inst. of Industrial ScienceUniv. of TokyoTokyoJapan