projects / pve-docs.git / blame
| Commit | Line | Data |
|---|---|---|
| 08152ae6 DM |
1 | Logical Volume Manager (LVM) |
| 2 | ---------------------------- | |
| e71b5d0d | 3 | include::attributes.txt[] |
| 08152ae6 | 4 | |
| 5f09af76 DM |
5 | ifdef::wiki[] |
| 6 | :pve-toplevel: | |
| 7 | endif::wiki[] | |
| 8 | ||
| 08152ae6 | 9 | Most people install {pve} directly on a local disk. The {pve} |
| 8b849dc3 DM |
10 | installation CD offers several options for local disk management, and |
| 11 | the current default setup uses LVM. The installer let you select a | |
| 12 | single disk for such setup, and uses that disk as physical volume for | |
| 8c1189b6 | 13 | the **V**olume **G**roup (VG) `pve`. The following output is from a |
| 8b849dc3 | 14 | test installation using a small 8GB disk: |
| 08152ae6 | 15 | |
| 8b849dc3 DM |
16 | ---- |
| 17 | # pvs | |
| 18 | PV VG Fmt Attr PSize PFree | |
| 19 | /dev/sda3 pve lvm2 a-- 7.87g 876.00m | |
| 20 | ||
| 21 | # vgs | |
| 22 | VG #PV #LV #SN Attr VSize VFree | |
| 23 | pve 1 3 0 wz--n- 7.87g 876.00m | |
| 24 | ---- | |
| 25 | ||
| 26 | The installer allocates three **L**ogical **V**olumes (LV) inside this | |
| 27 | VG: | |
| 28 | ||
| 29 | ---- | |
| 30 | # lvs | |
| 31 | LV VG Attr LSize Pool Origin Data% Meta% | |
| 32 | data pve twi-a-tz-- 4.38g 0.00 0.63 | |
| 33 | root pve -wi-ao---- 1.75g | |
| 34 | swap pve -wi-ao---- 896.00m | |
| 35 | ---- | |
| 36 | ||
| 8c1189b6 | 37 | root:: Formatted as `ext4`, and contains the operation system. |
| 8b849dc3 DM |
38 | |
| 39 | swap:: Swap partition | |
| 40 | ||
| 41 | data:: This volume uses LVM-thin, and is used to store VM | |
| 42 | images. LVM-thin is preferable for this task, because it offers | |
| 43 | efficient support for snapshots and clones. | |
| 08152ae6 | 44 | |
| d822a869 DM |
45 | Hardware |
| 46 | ~~~~~~~~ | |
| 47 | ||
| 48 | We highly recommend to use a hardware RAID controller (with BBU) for | |
| 49 | such setups. This increases performance, provides redundancy, and make | |
| 50 | disk replacements easier (hot-pluggable). | |
| 51 | ||
| 52 | LVM itself does not need any special hardware, and memory requirements | |
| 53 | are very low. | |
| 54 | ||
| 55 | ||
| 56 | Bootloader | |
| 57 | ~~~~~~~~~~ | |
| 58 | ||
| 59 | We install two boot loaders by default. The first partition contains | |
| 60 | the standard GRUB boot loader. The second partition is an **E**FI **S**ystem | |
| 61 | **P**artition (ESP), which makes it possible to boot on EFI systems. |