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第 66 章 Logical Volume Manager (LVM)

目錄

66.1. 物理卷管理(physical volume)
66.1.1. pvcreate
66.1.2. pvdisplay
66.1.3. pvs
66.2. 卷組管理(Volume Group)
66.2.1. vgcreate
66.2.2. vgdisplay
66.2.3. vgs
66.2.4. vgchange
66.2.5. vgextend
66.2.6. vgreduce
66.3. 邏輯卷管理(logical volume)
66.3.1. lvcreate
66.3.1.1. snapshot
66.3.2. lvdisplay
66.3.3. lvremove
66.3.3.1. snapshot
66.4. Format
66.5. mount
66.5.1. lv
66.5.2. snapshot
66.6. snapshot backup

vg,lv命名規則,建議採用:

1. /dev/vg00/lvol00

2. /dev/VolGroup00/LogVol00

lvm 創建流程 pvcreate - vgcreate - lvcreate

# pvcreate /dev/sdb4
  Physical volume "/dev/sdb4" successfully created

# vgcreate vg1 /dev/sdb4
  Volume group "vg1" successfully created

# lvcreate -l 10239 -n lv0 vg1
  Logical volume "lv0" created
	

66.1. 物理卷管理(physical volume)

66.1.1. pvcreate

將整個硬碟劃為物理卷

# pvcreate /dev/hdb
			

將單個分區創建為物理卷的命令為:

# pvcreate /dev/hda5
			

實例

# pvcreate /dev/sdb4
  Physical volume "/dev/sdb4" successfully created
			

66.1.2. pvdisplay

# pvdisplay
  --- Physical volume ---
  PV Name               /dev/sdb4
  VG Name               vg1
  PV Size               1.02 TiB / not usable 4.90 MiB
  Allocatable           yes
  PE Size               4.00 MiB
  Total PE              267301
  Free PE               257062
  Allocated PE          10239
  PV UUID               g2xLQ8-7tgm-iNZc-8dVq-vo3z-CFJp-LryYAs

			

66.1.3. pvs

# pvs
  PV         VG   Fmt  Attr PSize PFree
  /dev/sdb4  vg1  lvm2 a-   1.02t 1004.15g