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1 | Logical Volume Manager (LVM) |
2 | ---------------------------- | |
5f09af76 DM |
3 | ifdef::wiki[] |
4 | :pve-toplevel: | |
5 | endif::wiki[] | |
6 | ||
08152ae6 | 7 | Most people install {pve} directly on a local disk. The {pve} |
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8 | installation CD offers several options for local disk management, and |
9 | the current default setup uses LVM. The installer let you select a | |
10 | single disk for such setup, and uses that disk as physical volume for | |
8c1189b6 | 11 | the **V**olume **G**roup (VG) `pve`. The following output is from a |
8b849dc3 | 12 | test installation using a small 8GB disk: |
08152ae6 | 13 | |
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14 | ---- |
15 | # pvs | |
16 | PV VG Fmt Attr PSize PFree | |
17 | /dev/sda3 pve lvm2 a-- 7.87g 876.00m | |
18 | ||
19 | # vgs | |
20 | VG #PV #LV #SN Attr VSize VFree | |
21 | pve 1 3 0 wz--n- 7.87g 876.00m | |
22 | ---- | |
23 | ||
24 | The installer allocates three **L**ogical **V**olumes (LV) inside this | |
25 | VG: | |
26 | ||
27 | ---- | |
28 | # lvs | |
29 | LV VG Attr LSize Pool Origin Data% Meta% | |
30 | data pve twi-a-tz-- 4.38g 0.00 0.63 | |
31 | root pve -wi-ao---- 1.75g | |
32 | swap pve -wi-ao---- 896.00m | |
33 | ---- | |
34 | ||
8c1189b6 | 35 | root:: Formatted as `ext4`, and contains the operation system. |
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36 | |
37 | swap:: Swap partition | |
38 | ||
39 | data:: This volume uses LVM-thin, and is used to store VM | |
40 | images. LVM-thin is preferable for this task, because it offers | |
41 | efficient support for snapshots and clones. | |
08152ae6 | 42 | |
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43 | Hardware |
44 | ~~~~~~~~ | |
45 | ||
46 | We highly recommend to use a hardware RAID controller (with BBU) for | |
47 | such setups. This increases performance, provides redundancy, and make | |
48 | disk replacements easier (hot-pluggable). | |
49 | ||
50 | LVM itself does not need any special hardware, and memory requirements | |
51 | are very low. | |
52 | ||
53 | ||
54 | Bootloader | |
55 | ~~~~~~~~~~ | |
56 | ||
57 | We install two boot loaders by default. The first partition contains | |
58 | the standard GRUB boot loader. The second partition is an **E**FI **S**ystem | |
59 | **P**artition (ESP), which makes it possible to boot on EFI systems. |