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58 lines
1.7 KiB
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58 lines
1.7 KiB
Plaintext
Logical Volume Manager (LVM)
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----------------------------
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include::attributes.txt[]
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Most people install {pve} directly on a local disk. The {pve}
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installation CD offers several options for local disk management, and
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the current default setup uses LVM. The installer let you select a
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single disk for such setup, and uses that disk as physical volume for
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the **V**olume **G**roup (VG) `pve`. The following output is from a
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test installation using a small 8GB disk:
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----
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# pvs
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PV VG Fmt Attr PSize PFree
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/dev/sda3 pve lvm2 a-- 7.87g 876.00m
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# vgs
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VG #PV #LV #SN Attr VSize VFree
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pve 1 3 0 wz--n- 7.87g 876.00m
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----
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The installer allocates three **L**ogical **V**olumes (LV) inside this
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VG:
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----
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# lvs
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LV VG Attr LSize Pool Origin Data% Meta%
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data pve twi-a-tz-- 4.38g 0.00 0.63
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root pve -wi-ao---- 1.75g
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swap pve -wi-ao---- 896.00m
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----
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root:: Formatted as `ext4`, and contains the operation system.
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swap:: Swap partition
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data:: This volume uses LVM-thin, and is used to store VM
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images. LVM-thin is preferable for this task, because it offers
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efficient support for snapshots and clones.
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Hardware
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~~~~~~~~
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We highly recommend to use a hardware RAID controller (with BBU) for
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such setups. This increases performance, provides redundancy, and make
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disk replacements easier (hot-pluggable).
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LVM itself does not need any special hardware, and memory requirements
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are very low.
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Bootloader
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~~~~~~~~~~
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We install two boot loaders by default. The first partition contains
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the standard GRUB boot loader. The second partition is an **E**FI **S**ystem
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**P**artition (ESP), which makes it possible to boot on EFI systems.
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