LV Size 확장 및 축소

 

확장

 

# lvextend -L +100M /dev/vg_data/lv_data ( 볼륨을 확장할 device 이름)

# resize2fs /dev/vg_data/lv_data ( 온라인 상태에서 확장할 수 있는 명령어, RHEL 5 에서 사용가능)

# df -h 명령어로 확인해 보면 mount 된 볼륨이 확장된걸 확인할 수 있다.

2GB LV를 500MB 로 만드는 축소 LVM 예제

* 파일시스템 UMOUNT (필수)

[root@gfs1 ~]# e2fsck -f /dev/mapper/vggfs-lv_02
e2fsck 1.39 (29-May-2006)
Pass 1: Checking inodes, blocks, and sizes
Pass 2: Checking directory structure
Pass 3: Checking directory connectivity
Pass 4: Checking reference counts
Pass 5: Checking group summary information
/dev/mapper/vggfs-lv_02: 11/262144 files (9.1% non-contiguous), 25406/524288 blocks
[root@gfs1 ~]#

[root@gfs1 ~]# resize2fs /dev/mapper/vggfs-lv_02 500M
resize2fs 1.39 (29-May-2006)
Resizing the filesystem on /dev/mapper/vggfs-lv_02 to 128000 (4k) blocks.
The filesystem on /dev/mapper/vggfs-lv_02 is now 128000 blocks long.

[root@gfs1 ~]# lvs
  LV       VG         Attr   LSize   Origin Snap%  Move Log Copy%  Convert
  LogVol00 VolGroup00 -wi-ao   6.09G                                     
  LogVol01 VolGroup00 -wi-ao   5.97G                                     
  LogVol00 vg_gfstest -wi-a-  97.66G                                     
  lv_01    vggfs      -wi-ao 724.00M                                     
  lv_02    vggfs      -wi-a-   2.00G       

                              
[root@gfs1 ~]# lvreduce -L -1.5G /dev/mapper/vggfs-lv_02
  WARNING: Reducing active logical volume to 512.00 MB
  THIS MAY DESTROY YOUR DATA (filesystem etc.)
Do you really want to reduce lv_02? [y/n]: y
  Reducing logical volume lv_02 to 512.00 MB
  Logical volume lv_02 successfully resized

[root@gfs1 ~]# mount /dev/mapper/vggfs-lv_02 /mnt
[root@gfs1 ~]# df -h
Filesystem            Size  Used Avail Use% Mounted on
/dev/mapper/VolGroup00-LogVol00
                      6.0G  3.2G  2.5G  58% /
/dev/sda5              99M   13M   81M  14% /boot
tmpfs                  18G     0   18G   0% /dev/shm
/dev/mapper/vggfs-lv_01
                      492M   66M  402M  15% /mnt
/dev/mapper/vggfs-lv_02
                      492M   66M  402M  15% /mnt
[root@gfs1 ~]#