Encyclopedia of Database Systems

2009 Edition
| Editors: LING LIU, M. TAMER ÖZSU

Logical Volume Manager

  • Kenichi Wada
Reference work entry
DOI: https://doi.org/10.1007/978-0-387-39940-9_1345

Synonyms

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 2009

Authors and Affiliations

  • Kenichi Wada
    • 1
  1. 1.Hitachi LimitedTokyoJapan