07. LVM (Logicla Volume Manager)

◇ LVM (Logicla Volume Manager)

1. pv (Physical volume)

2. pvcreate

           /dev/sdb

3. vgcreate

4. lvcreate

5. mkfs.ext3 /dev/poly/polylvm

6. mount

◇ LVM(Logical Volume Manager)

1. Physical Volume
   pvcreate device

2. Volume Group
   vgcreate vg_name device1 device2.....

◇         ***** Volume Group Activation *****

   vgchange -a y vg_name --> volumme group 활성화
   vgchange -a n vg_name --> volumme group 비활성화
   vgremove vg_name  --> volume group 해체
   vgdisplay -v vg_name

3. Logical Volume Creation
   lvcreate -L size -n lv_name vg_name
   lvcreate -l PE수 vg_name -n lv_name

◇        ***** Logical Volume Status Check ******

   lvscan

4. Format
   mkfs.ext3 /dev/vg_name/lv_name

5. Mount

◇        ***** LVM 관리 *****

1. VG에 PV 추가
   vgextend vg_name new_PV_name

2. VG에 PV 제거
   vgreduce vg_name device

3. LV 제거
   - umount
   - lvremove /dev/vg_name/lv_name

4. VG_name 바꾸기
   vgrename cur_vg_name new_vg_name

5. PV Status Check
   pvscan

6. LV resize
   lvextend -L+(-)size /dev/vg_name/lv_name
   lvextend -l+(-)PE수 /dev/vg_name/lv_name
   lvreduce -L-size /dev/vg_name/lv_name
   lvreduce -l-PE수 /dev/vg_name/lv_name

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