LVM: Difference between revisions
Created page with '{{header}} '''LVM''' is an acronym for '''L'''ogical '''V'''olume '''M'''anagement. It is a tool that takes one or more real or virtual disks and assigns them as Physical Volum…' |
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'''L'''ogical '''V'''olume; This is similar to a traditional raw partition. You can format an LV with a [[filesystem]], add it to a RAID or [[DRBD]] array and so on. | '''L'''ogical '''V'''olume; This is similar to a traditional raw partition. You can format an LV with a [[filesystem]], add it to a RAID or [[DRBD]] array and so on. | ||
= CLVM = | |||
When LVM is used in a cluster, it is referred to as '''C''lustered LVM. This indicates that it has been made "cluster aware" and now relies on the cluster's [[DLM]] for safe operation. | |||
{{footer}} | {{footer}} | ||
Revision as of 00:19, 9 September 2010
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Alteeve Wiki :: LVM |
LVM is an acronym for Logical Volume Management.
It is a tool that takes one or more real or virtual disks and assigns them as Physical Volumes (PVs). From one or more PVs you can create a Volume Group (VG). The VG acts as a pool of raw space from which one or more Logical Volumes (LVs) can be created. These LVs are essentially a tradition partition on top of which you can format with a filesystem, assign to a RAID device and so on.
PV
Physical Volume; This is a raw partition from a disk assigned to be used in an LVM.
VG
Volume Group; This is a pool of one or more PVs. From this pool of raw space, LVs are created.
LV
Logical Volume; This is similar to a traditional raw partition. You can format an LV with a filesystem, add it to a RAID or DRBD array and so on.
CLVM
When LVM is used in a cluster, it is referred to as 'Clustered LVM. This indicates that it has been made "cluster aware" and now relies on the cluster's DLM for safe operation.
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