lvm2

首先创建好lvm分区

1. # fdisk /dev/vdb -l
3. Disk /dev/vdb: 42.9 GB, 42949672960 bytes
4. 16 heads, 63 sectors/track, 83220 cylinders
5. Units = cylinders of 1008 * 512 = 516096 bytes
6. Sector size (logical/physical): 512 bytes / 512 bytes
7. I/O size (minimum/optimal): 512 bytes / 512 bytes
8. Disk identifier: 0x3ba3c66b
10. Device Boot Start End Blocks Id System
11. /dev/vdb1 1 4162 2097616+ 83 Linux
12. /dev/vdb2 4163 24968 10486224 5 Extended
13. /dev/vdb5 4163 8324 2097616+ 8e Linux LVM
14. /dev/vdb6 8325 12486 2097616+ 8e Linux LVM
15. /dev/vdb7 12487 16648 2097616+ 8e Linux LVM
16. /dev/vdb8 16649 20810 2097616+ 8e Linux LVM

创建pv，查看pv

1. # pvcreate /dev/vdb5
2. Physical volume "/dev/vdb5" successfully created
3. # pvdisplay
4. "/dev/vdb5" is a new physical volume of "2.00 GiB"
5. --- NEW Physical volume ---
6. PV Name /dev/vdb5
7. VG Name
8. PV Size 2.00 GiB
9. Allocatable NO
10. PE Size 0
11. Total PE 0
12. Free PE 0
13. Allocated PE 0
14. PV UUID 5uqG4x-sCEP-drkf-bcaY-V2FP-tKdY-wU8m0L

创建vg查看vg

1. # vgcreate myvg0 /dev/vdb5
2. Volume group "myvg0" successfully created
3. # vgdisplay
4. --- Volume group ---
5. VG Name myvg0
6. System ID
7. Format lvm2
8. Metadata Areas 1
9. Metadata Sequence No 1
10. VG Access read/write
11. VG Status resizable
12. MAX LV 0
13. Cur LV 0
14. Open LV 0
15. Max PV 0
16. Cur PV 1
17. Act PV 1
18. VG Size 2.00 GiB
19. PE Size 4.00 MiB
20. Total PE 511
21. Alloc PE / Size 0 / 0
22. Free PE / Size 511 / 2.00 GiB
23. VG UUID J2lV3U-aY3W-xSRN-DktS-jv1j-R0Nr-JzRatC

扩展vg

# vgextend myvg0 /dev/vdb6  Volume group "myvg0" successfully extended

移除pv，vg

1. # pvmove /dev/vdb6
2. No data to move for myvg0
3. # vgreduce myvg0 /dev/vdb6
4. Removed "/dev/vdb6" from volume group "myvg0"

创建lv

1. # lvcreate -L 1G -n mylv0 myvg0
2. Logical volume "mylv0" created.

格式化lv

1. # mke2fs -t ext4 -b 1024 -L MYLV /dev/myvg0/mylv0
2. mke2fs 1.41.12 (17-May-2010)
3. Filesystem label=MYLV
4. OS type: Linux
5. Block size=1024 (log=0)
6. Fragment size=1024 (log=0)
7. Stride=0 blocks, Stripe width=0 blocks
8. 65536 inodes, 1048576 blocks
9. 52428 blocks (5.00%) reserved for the super user
10. First data block=1
11. Maximum filesystem blocks=68157440
12. 128 block groups
13. 8192 blocks per group, 8192 fragments per group
14. 512 inodes per group
15. Superblock backups stored on blocks:
16. 8193, 24577, 40961, 57345, 73729, 204801, 221185, 401409, 663553,
17. 1024001
19. Writing inode tables: done
20. Creating journal (32768 blocks): done
21. Writing superblocks and filesystem accounting information: done

挂载lv

1. # mount /dev/myvg0/mylv0 /lv
2. # df -h
3. Filesystem Size Used Avail Use% Mounted on
4. /dev/vda1 40G 4.6G 33G 13% /
5. tmpfs 7.8G 0 7.8G 0% /dev/shm
6. /dev/mapper/myvg0-mylv0
7. 976M 2.8M 922M 1% /lv