本文标题:LVM试验【本站如从外站转载,会注明出处】
本文链接:http://www.validba.net/2009/02/lvm%e8%af%95%e9%aa%8c/
准备在vmwave上模拟lvm的试验, 安装完vmwave后创建了四个1G的硬盘作为lvm的物理介质.
试验环境:
[root@mayp lvm]# uname -a
Linux mayp 2.6.9-42.0.0.0.1.EL #1 Sun Oct 15 13:58:55 PDT 2006 i686 i686 i386 GNU/Linux
[root@mayp lvm]# more /etc/redhat-release
Enterprise Linux Enterprise Linux AS release 4 (October Update 4)
新创建的试验磁盘
[root@mayp lvm]# fdisk -l
Disk /dev/sda: 10.7 GB, 10737418240 bytes
255 heads, 63 sectors/track, 1305 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sda1 * 1 15 120456 83 Linux
/dev/sda2 16 338 2594497+ 83 Linux
/dev/sda3 339 733 3172837+ 83 Linux
/dev/sda4 734 1305 4594590 5 Extended
/dev/sda5 734 1242 4088511 83 Linux
/dev/sda6 1243 1305 506016 82 Linux swap
Disk /dev/sdb: 1073 MB, 1073741824 bytes
255 heads, 63 sectors/track, 130 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk /dev/sdb doesn’t contain a valid partition table
Disk /dev/sdc: 1073 MB, 1073741824 bytes
255 heads, 63 sectors/track, 130 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk /dev/sdc doesn’t contain a valid partition table
Disk /dev/sdd: 1073 MB, 1073741824 bytes
255 heads, 63 sectors/track, 130 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk /dev/sdd doesn’t contain a valid partition table
Disk /dev/sde: 1073 MB, 1073741824 bytes
255 heads, 63 sectors/track, 130 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk /dev/sde doesn’t contain a valid partition table
/dev/sdb、/dev/sdc 、/dev/sdd 、/dev/sde作为lvm的试验磁盘
RedHat AS 4提供了一个lvm 平台,我们利用这个平台进行lvm的操作,运行lvm命令可以进入这个lvm操作平台
PV创建：
lvm> pvcreate –version
LVM version: 2.02.06 (2006-05-12)
Library version: 1.02.07 (2006-05-11)
Driver version: 4.5.0
lvm> pvcreate -v /dev/sdb
Set up physical volume for "/dev/sdb" with 2096768 available sectors
Zeroing start of device /dev/sdb
Physical volume "/dev/sdb" successfully created
lvm> pvcreate -v /dev/sdc
Set up physical volume for "/dev/sdc" with 2096768 available sectors
Zeroing start of device /dev/sdc
Physical volume "/dev/sdc" successfully created
lvm> pvcreate -v /dev/sdd
Set up physical volume for "/dev/sdd" with 2096768 available sectors
Zeroing start of device /dev/sdd
Physical volume "/dev/sdd" successfully created
lvm> pvcreate -v /dev/sde
Set up physical volume for "/dev/sde" with 2096768 available sectors
Zeroing start of device /dev/sde
Physical volume "/dev/sde" successfully created
lvm> pvscan
PV /dev/sdb lvm2 [1023.81 MB]
PV /dev/sdc lvm2 [1023.81 MB]
PV /dev/sdd lvm2 [1023.81 MB]
PV /dev/sde lvm2 [1023.81 MB]
Total: 4 [4.00 GB] / in use: 0 [0 ] / in no VG: 4 [4.00 GB]
VG创建:
lvm> vgcreate -v data_oracle /dev/sdb /dev/sdc /dev/sdd /dev/sde
Wiping cache of LVM-capable devices
Adding physical volume ‘/dev/sdb’ to volume group ‘data_oracle’
Adding physical volume ‘/dev/sdc’ to volume group ‘data_oracle’
Adding physical volume ‘/dev/sdd’ to volume group ‘data_oracle’
Adding physical volume ‘/dev/sde’ to volume group ‘data_oracle’
Creating directory "/etc/lvm/archive"
Archiving volume group "data_oracle" metadata (seqno 0).
Creating directory "/etc/lvm/backup"
Creating volume group backup "/etc/lvm/backup/data_oracle" (seqno 1).
Volume group "data_oracle" successfully created
lvm> vgs -a
VG #PV #LV #SN Attr VSize VFree
data_oracle 4 0 0 wz–n- 3.98G 3.98G
LV创建：
lvm> lvcreate –addtag oracle_data -v –name data_oracle_L_1 –size 3.98G data_oracle
Finding volume group "data_oracle"
Rounding up size to full physical extent 3.98 GB
Archiving volume group "data_oracle" metadata (seqno 1).
Creating logical volume data_oracle_L_1
Creating volume group backup "/etc/lvm/backup/data_oracle" (seqno 2).
Found volume group "data_oracle"
Creating data_oracle-data_oracle_L_1
Loading data_oracle-data_oracle_L_1 table
Resuming data_oracle-data_oracle_L_1 (253:0)
Clearing start of logical volume "data_oracle_L_1"
Creating volume group backup "/etc/lvm/backup/data_oracle" (seqno 2).
Logical volume "data_oracle_L_1" created
lvm> lvs -a
LV VG Attr LSize Origin Snap% Move Log Copy%
data_oracle_L_1 data_oracle -wi-a- 3.98G
lvm> lvscan
ACTIVE ‘/dev/data_oracle/data_oracle_L_1′ [3.98 GB] inherit
lvm>
挂载lv：
[root@mayp dev]# mkdir /data
格式化lv
[root@mayp dev]# mkfs -t ext3 /dev/data_oracle/data_oracle_L_1
mke2fs 1.35 (28-Feb-2004)
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
522240 inodes, 1043456 blocks
52172 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=1069547520
32 block groups
32768 blocks per group, 32768 fragments per group
16320 inodes per group
Superblock backups stored on blocks:
32768, 98304, 163840, 229376, 294912, 819200, 884736
Writing inode tables: done
Creating journal (8192 blocks): done
Writing superblocks and filesystem accounting information: done
This filesystem will be automatically checked every 29 mounts or
180 days, whichever comes first. Use tune2fs -c or -i to override.
[root@mayp dev]# mount /dev/data_oracle/data_oracle_L_1 /data
[root@mayp dev]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/sda2 2.5G 1.8G 559M 77% /
/dev/sda1 114M 8.5M 100M 8% /boot
none 133M 0 133M 0% /dev/shm
/dev/sda3 3.0G 37M 2.8G 2% /home
/dev/sda5 3.9G 40M 3.7G 2% /u01
/dev/mapper/data_oracle-data_oracle_L_1
4.0G 40M 3.7G 2% /data
