1 Logical Volume Manager (LVM)
2 ----------------------------
3 include::attributes.txt[]
5 Most people install {pve} directly on a local disk. The {pve}
6 installation CD offers several options for local disk management, and
7 the current default setup uses LVM. The installer let you select a
8 single disk for such setup, and uses that disk as physical volume for
9 the **V**olume **G**roup (VG) 'pve'. The following output is from a
10 test installation using a small 8GB disk:
14 PV VG Fmt Attr PSize PFree
15 /dev/sda3 pve lvm2 a-- 7.87g 876.00m
18 VG #PV #LV #SN Attr VSize VFree
19 pve 1 3 0 wz--n- 7.87g 876.00m
22 The installer allocates three **L**ogical **V**olumes (LV) inside this
27 LV VG Attr LSize Pool Origin Data% Meta%
28 data pve twi-a-tz-- 4.38g 0.00 0.63
29 root pve -wi-ao---- 1.75g
30 swap pve -wi-ao---- 896.00m
33 root:: Formatted as 'ext4', and contains the operation system.
37 data:: This volume uses LVM-thin, and is used to store VM
38 images. LVM-thin is preferable for this task, because it offers
39 efficient support for snapshots and clones.
41 NOTE: We highly recommend to use a hardware RAID controller (with
42 BBU) for such setups. This increases performance, provides redundancy,
43 and make disk replacements easier (hot-pluggable).