返回首页
当前位置: 主页 > 精通Office > Ubuntu教程 >

Extend LVM partition size when there is no free space in the

时间:2015-07-12 20:51来源:知行网www.zhixing123.cn 编辑:麦田守望者

There are some cases when we want to extend the size of LVM partition but if there is no free space available in the Volume group , then first we have to extend the volume group , to extend the volume group add new disks in volume group using vgextend command.

If there is no free disk available on the linux box , then you can ask the storage team to assign new disk to the server.
Scenario : Suppose We want to extend the size of /home , but there is no free in the volume group .

[root@cloud ~]# df -h /home/
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/vg_cloud-LogVol00
16G 16G 41M 100% /home

[root@cloud ~]# vgdisplay vg_cloud
— Volume group —
VG Name vg_cloud
System ID
Format lvm2
Metadata Areas 1
Metadata Sequence No 8
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 3
Open LV 3
Max PV 0
Cur PV 1
Act PV 1
VG Size 27.01 GiB
PE Size 4.00 MiB
Total PE 6915
Alloc PE / Size 6915 / 27.01 GiB
Free PE / Size 0 / 0
VG UUID 1R89GB-mIP2-7Hgu-zEVR-5H02-7GdB-Ufj7R4



Step:1 Create the Physical Volume on new disk

Check the new disk using ' fdisk -l ' command and create the physical volume, in my case new disk is '/dev/sdb'

root@cloud ~]# pvcreate /dev/sdb
Physical volume "/dev/sdb" successfully created



Step:2 Now extend the Size of Volume Group using vgextend.

[root@cloud ~]# vgextend vg_cloud /dev/sdb
Volume group "vg_cloud" successfully extended



Step:3 Verify the size of Volume Group.

[root@cloud ~]# vgdisplay vg_cloud
— Volume group —
VG Name vg_cloud
System ID
Format lvm2
Metadata Areas 2
Metadata Sequence No 9
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 3
Open LV 3
Max PV 0
Cur PV 2
Act PV 2
VG Size 37.04 GiB
PE Size 4.00 MiB
Total PE 9481
Alloc PE / Size 6915 / 27.01 GiB
Free PE / Size 2566 / 10.02 GiB
VG UUID 1R89GB-mIP2-7Hgu-zEVR-5H02-7GdB-Ufj7R4



Note: As you can see Available or Free PE / size is 10.02GB.



Step:4 Extend the lvm size using lvextend command

[root@cloud ~]# lvextend -L +5G /dev/mapper/vg_cloud-LogVol00
Extending logical volume LogVol00 to 21.25 GiB
Logical volume LogVol00 successfully resized



Step:5 Run the resize2fs command

[root@cloud ~]# resize2fs /dev/mapper/vg_cloud-LogVol00
resize2fs 1.41.12 (17-May-2010)
Filesystem at /dev/mapper/vg_cloud-LogVol00 is mounted on /home; on-line resizing required
old desc_blocks = 2, new_desc_blocks = 2
Performing an on-line resize of /dev/mapper/vg_cloud-LogVol00 to 5569536 (4k) blocks.
The filesystem on /dev/mapper/vg_cloud-LogVol00 is now 5569536 blocks long.



Step:5 Verify the filesystem size

[root@cloud ~]# df -h /home/
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/vg_cloud-LogVol00
21G 16G 4.8G 77% /home

顶一下
(0)
0%
踩一下
(0)
0%
------分隔线----------------------------
标签(Tag):Ubuntu Ubuntu教程 Ubuntu美化 Ubuntu技巧 ubuntu源 ubuntu模板
------分隔线----------------------------
发表评论
请自觉遵守互联网相关的政策法规,严禁发布色情、暴力、反动的言论。
评价:
表情:
验证码:点击我更换图片
猜你感兴趣