扩展LV

LVM最大的特性就是可以弹性调整磁盘容量
下面扩展一个已经存在的LV [root@ol6-121-rac1 mnt]# lvdisplay --- Logical volume --- LV Path /dev/vg_ol6121rac1/lv_root LV Name lv_root VG Name vg_ol6121rac1 LV UUID dahhMU-zPic-pKVq-3fan-YPCb-PlA6-JeWqe2 LV Write Access read/write LV Creation host, time ol6-121-rac1.localdomain, 2014-03-17 12:00:59 +0800 LV Status available # open 1 LV Size 9.54 GiB Current LE 2442 Segments 1 Allocation inherit Read ahead sectors auto - currently set to     256 Block device 252:0

   

  --- Logical volume --- LV Path /dev/vg_ol6121rac1/lv_swap LV Name lv_swap VG Name vg_ol6121rac1 LV UUID W3DHZp-o2wE-e49m-VJy0-4CYh-ZcMn-CRrtPf LV Write Access read/write LV Creation host, time ol6-121-rac1.localdomain, 2014-03-17 12:01:01 +0800 LV Status available # open 2 LV Size 1.97 GiB Current LE 504 Segments 1 Allocation inherit Read ahead sectors auto - currently set to     256 Block device 252:1 [root@ol6-121-rac1 mnt]# 
扩展VG [root@ol6-121-rac1 mnt]# vgextend vg_ol6121rac1 /dev/sdb{1,2} 
 Volume group "vg_ol6121rac1" successfully extended [root@ol6-121-rac1 mnt]# vgdisplay --- Volume group --- VG Name vg_ol6121rac1 System ID Format lvm2 Metadata Areas 3 Metadata Sequence No 4 VG Access read/write VG Status resizable MAX LV 0 Cur LV 2 Open LV 2 Max PV 0 Cur PV 3 Act PV 3 VG Size 21.50 GiB PE Size 4.00 MiB Total PE 5504 Alloc PE / Size       2946 / 11.51 GiB Free PE / Size       2558 / 9.99 GiB VG UUID 5S3HpA-qT3U-ZSt7-AUZf-DUVs-oTAf-xByhje [root@ol6-121-rac1 mnt]# pvdisplay --- Physical volume --- PV Name /dev/sda2 VG Name vg_ol6121rac1 PV Size 11.51 GiB / not usable 3.00 MiB Allocatable yes (but full) PE Size 4.00 MiB Total PE 2946 Free PE 0 Allocated PE 2946 PV UUID YEG40A-wEWW-9F8Z-bgcL-PWvA-7sef-FP12my --- Physical volume --- PV Name /dev/sdb1 VG Name vg_ol6121rac1 PV Size 5.01 GiB / not usable 2.10 MiB Allocatable yes PE Size 4.00 MiB Total PE 1282 Free PE 1282 Allocated PE 0 PV UUID p2nXS7-MmpX-Pawj-ThU3-k1NQ-t5Rc-hqKtb4 --- Physical volume --- PV Name /dev/sdb2 VG Name vg_ol6121rac1 PV Size 4.99 GiB / not usable 2.60 MiB Allocatable yes PE Size 4.00 MiB Total PE 1276 Free PE 1276 Allocated PE 0 PV UUID M31k1o-JGJx-3OrN-DmNf-W8uJ-SXBB-JdSviW [root@ol6-121-rac1 mnt]# 扩展LV [root@ol6-121-rac1 mnt]# lvresize -L +9.99G /dev/ Display all 183 possibilities? (y or n) [root@ol6-121-rac1 mnt]# lvresize -L +9.99G /dev/vg vga_arbiter vg_ol6121rac1/ [root@ol6-121-rac1 mnt]# lvresize -L +9.99G /dev/vg_ol6121rac1/lv_root Rounding size to boundary between physical extents: 9.99 GiB Extending logical volume lv_root to 19.53 GiB Logical volume lv_root successfully resized [root@ol6-121-rac1 mnt]# [root@ol6-121-rac1 mnt]# [root@ol6-121-rac1 mnt]# [root@ol6-121-rac1 mnt]# df -h Filesystem Size Used Avail Use% Mounted on /dev/mapper/vg_ol6121rac1-lv_root 9.4G  3.9G  5.1G  44% / tmpfs 499M 100K 499M 1% /dev/shm /dev/sda1             485M   55M  405M  12% /boot /dev/sr0              3.5G  3.5G     0 100% /media/OL6.4 x86_64 Disc 1 20130225 [root@ol6-121-rac1 mnt]# lvdisplay --- Logical volume --- LV Path /dev/vg_ol6121rac1/lv_root LV Name lv_root VG Name vg_ol6121rac1 LV UUID dahhMU-zPic-pKVq-3fan-YPCb-PlA6-JeWqe2 LV Write Access read/write LV Creation host, time ol6-121-rac1.localdomain, 2014-03-17 12:00:59 +0800 LV Status available # open 1 LV Size 19.53 GiB Current LE 5000 Segments 3 Allocation inherit Read ahead sectors auto - currently set to     256 Block device 252:0

   

  --- Logical volume --- LV Path /dev/vg_ol6121rac1/lv_swap LV Name lv_swap VG Name vg_ol6121rac1 LV UUID W3DHZp-o2wE-e49m-VJy0-4CYh-ZcMn-CRrtPf LV Write Access read/write LV Creation host, time ol6-121-rac1.localdomain, 2014-03-17 12:01:01 +0800 LV Status available # open 2 LV Size 1.97 GiB Current LE 504 Segments 1 Allocation inherit Read ahead sectors auto - currently set to     256 Block device 252:1 
完整的讲LV扩充到整个文件系统 [root@ol6-121-rac1 mnt]# resize2fs /dev/vg_ol6121rac1/lv_root  resize2fs 1.41.12 (17-May-2010) Filesystem at /dev/vg_ol6121rac1/lv_root is mounted on /; on-line resizing required old desc_blocks = 1, new_desc_blocks = 2 Performing an on-line resize of /dev/vg_ol6121rac1/lv_root to 5120000 (4k) blocks. The filesystem on /dev/vg_ol6121rac1/lv_root is now 5120000 blocks long. [root@ol6-121-rac1 mnt]# df -h Filesystem Size Used Avail Use% Mounted on /dev/mapper/vg_ol6121rac1-lv_root  20G 3.9G 15G 22% / tmpfs 499M 100K 499M 1% /dev/shm /dev/sda1             485M   55M  405M  12% /boot /dev/sr0              3.5G  3.5G     0 100% /media/OL6.4 x86_64 Disc 1 20130225