LVM extent volume size
+ 當前的LVM管理一塊磁盤/dev/sda
+ 方法1:對現有磁盤sda進行擴容,並將增加的空間擴展進最大volumn
+ 方法2:添加一塊新的磁盤sdb,並將增加的空間擴展到最大的volumn
1,擴展現有磁盤/dev/sda(擴存儲5GB),並重啟機器
a,創建新的主分區/dev/sda3,命令fdisk /dev/sda
[root@localhost ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/vg01-lv01
46G 3.0G 41G 7% /
/dev/sda1 99M 18M 77M 19% /boot
tmpfs 185M 0 185M 0% /dev/shm
b,創建新pv,命令pvcreate /dev/sda3,如果不重啟則出錯。
[root@localhost ~]# pvcreate /dev/sda3
Physical volume "/dev/sda3" successfully created
c,擴展現有vg,命令vgextend vg01 /dev/sda3
[root@localhost ~]# vgextend vg01 /dev/sda3
Volume group "vg01" successfully extended
d,擴展lv 2GB,命令lvextend -L+2G /dev/vg01/lv01
[root@localhost ~]# lvextend -L+2G /dev/vg01/lv01
Extending logical volume lv01 to 49.00 GB
Logical volume lv01 successfully resized
e,擴展lv的文件系統,命令resize2fs /dev/vg01/lv01
[root@localhost ~]# resize2fs /dev/vg01/lv01
resize2fs 1.39 (29-May-2006)
Filesystem at /dev/vg01/lv01 is mounted on /; on-line resizing required
Performing an on-line resize of /dev/vg01/lv01 to 12845056 (4k) blocks.
The filesystem on /dev/vg01/lv01 is now 12845056 blocks long.
[root@localhost ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/vg01-lv01
48G 3.0G 43G 7% /
/dev/sda1 99M 18M 77M 19% /boot
tmpfs 185M 0 185M 0% /dev/shm
2,添加額外的磁盤,也可以擴展LVM的volumn,方法與1完全一樣。