December 2003
Intermediate to advanced
458 pages
9h 3m
English
book
Deploying Linux on IBM eServer pSeries Clusters
by Dino Quintero, Prabhakar Attaluri, Tomas Baublys, Xinghong He, Chin Yau Lee, Francois Thomas
Content preview from Deploying Linux on IBM eServer pSeries Clusters
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3.6. Logical Volume Manager (LVM)
Linux traditionally handles storage by dividing the physical discs into partitions, formatting partitions in order to create file systems on them, and mounting those under the provided mount point.
A home file system mounted under /home resides, for example, on /dev/sda3, which is a device pointing to the third partition on the first scsi disk recognized by the system. Although this traditional storage handling works fine, it does not provide any flexibility. If you need to resize a partition or change the physical disk, all data must be backed up and restored after the change.
3.6.1. What is Logical Volume Manager
Logical Volume Manager (LVM) is an abstraction layer over the physical storage entities. It hides ...