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1 | Logical Volume Manager (LVM) |
2 | ---------------------------- | |
e71b5d0d | 3 | include::attributes.txt[] |
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4 | |
5 | Most people install {pve} directly on a local disk. The {pve} | |
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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 | |
8c1189b6 | 9 | the **V**olume **G**roup (VG) `pve`. The following output is from a |
8b849dc3 | 10 | test installation using a small 8GB disk: |
08152ae6 | 11 | |
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12 | ---- |
13 | # pvs | |
14 | PV VG Fmt Attr PSize PFree | |
15 | /dev/sda3 pve lvm2 a-- 7.87g 876.00m | |
16 | ||
17 | # vgs | |
18 | VG #PV #LV #SN Attr VSize VFree | |
19 | pve 1 3 0 wz--n- 7.87g 876.00m | |
20 | ---- | |
21 | ||
22 | The installer allocates three **L**ogical **V**olumes (LV) inside this | |
23 | VG: | |
24 | ||
25 | ---- | |
26 | # lvs | |
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 | |
31 | ---- | |
32 | ||
8c1189b6 | 33 | root:: Formatted as `ext4`, and contains the operation system. |
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34 | |
35 | swap:: Swap partition | |
36 | ||
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. | |
08152ae6 | 40 | |
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41 | Hardware |
42 | ~~~~~~~~ | |
43 | ||
44 | We highly recommend to use a hardware RAID controller (with BBU) for | |
45 | such setups. This increases performance, provides redundancy, and make | |
46 | disk replacements easier (hot-pluggable). | |
47 | ||
48 | LVM itself does not need any special hardware, and memory requirements | |
49 | are very low. | |
50 | ||
51 | ||
52 | Bootloader | |
53 | ~~~~~~~~~~ | |
54 | ||
55 | We install two boot loaders by default. The first partition contains | |
56 | the standard GRUB boot loader. The second partition is an **E**FI **S**ystem | |
57 | **P**artition (ESP), which makes it possible to boot on EFI systems. |