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第 1 章 Logical Volume Manager (LVM)

目錄

1.1. 物理卷管理(physical volume)
1.1.1. pvcreate
1.1.2. pvdisplay
1.1.3. pvs
1.2. 卷組管理(Volume Group)
1.2.1. vgcreate
1.2.2. vgdisplay
1.2.3. vgs
1.2.4. vgchange
1.2.5. vgextend
1.2.6. vgreduce
1.3. 邏輯卷管理(logical volume)
1.3.1. lvcreate
1.3.1.1. snapshot
1.3.2. lvdisplay
1.3.3. lvremove
1.3.3.1. snapshot
1.4. Format
1.5. mount
1.5.1. lv
1.5.2. snapshot
1.6. 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
	

1.1. 物理卷管理(physical volume)

1.1.1. 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
			

1.1.2. 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

			

1.1.3. pvs

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