linux——（6）IOM项目LVM方案



需求：

由于将11块本地硬盘做成一个vg，四个lv，但是在dm上面的IO遇到了瓶颈

现在将4块盘，做成两个vg，每个vg两个lv，条带化宽度为2，深度为64K

step1创建VG

[root@localhost ~]# vgcreate vg0 /dev/sdb1 /dev/sdc1

Volume group "vg0"successfully created

[root@localhost ~]# vgcreate vg1 /dev/sdd1 /dev/sde1

Volume group "vg1"successfully created

[root@localhost ~]#

step2创建LV

[root@localhost ~]# lvcreate -L 1.8T-n lvdata1 -i 2 -I 64 vg0

Rounding up size to full physicalextent 1.80 TiB

Logical volume "lvdata1"created

[root@localhost ~]# lvcreate -L 1.8T-n lvdata2 -i 2 -I 64 vg0

Rounding up size to full physicalextent 1.80 TiB

Logical volume "lvdata2"created

[root@localhost ~]# vgdisplay vg0

--- Volume group ---

VG Name vg0

System ID

Format lvm2

Metadata Areas 2

Metadata Sequence No 3

VG Access read/write

VG Status resizable

MAX LV 0

Cur LV 2

Open LV 0

Max PV 0

Cur PV 2

Act PV 2

VG Size 3.64 TiB

PE Size 4.00 MiB

Total PE 953862

Alloc PE / Size 943720 / 3.60 TiB

Free PE / Size 10142 / 39.62 GiB

VG UUID Re8exl-7XnT-GlQa-7nO8-fUy8-YgCb-FLSbUR

[root@localhost ~]# lvcreate -L 1.8T-n lvdata3 -i 2 -I 64 vg1

Rounding up size to full physicalextent 1.80 TiB

Logical volume "lvdata3"created

[root@localhost ~]# lvcreate -L 1.8T-n lvdata4 -i 2 -I 64 vg1

Rounding up size to full physicalextent 1.80 TiB

Logical volume "lvdata4"created

step3格式化LV

[root@localhost ~]# mkfs.ext4/dev/vg0/lvdata1

mke2fs 1.41.12 (17-May-2010)

Filesystem label=

OS type: Linux

Block size=4096 (log=2)

Fragment size=4096 (log=2)

Stride=16 blocks, Stripe width=32 blocks

120799232 inodes, 483184640 blocks

24159232 blocks (5.00%) reserved for thesuper user

First data block=0

Maximum filesystem blocks=4294967296

14746 block groups

32768 blocks per group, 32768 fragments pergroup

8192 inodes per group

Superblock backups stored on blocks:

32768,98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208,

4096000,7962624, 11239424, 20480000, 23887872, 71663616, 78675968,

102400000,214990848

Writing inode tables: done

Creating journal (32768 blocks): done

Writing superblocks and filesystem accountinginformation:

done

This filesystem will be automatically checkedevery 21 mounts or

180 days, whichever comes first. Usetune2fs -c or -i to override.

[root@localhost ~]# mkfs.ext4/dev/vg0/lvdata2

[root@localhost ~]# mkfs.ext4/dev/vg1/lvdata3

[root@localhost ~]# mkfs.ext4/dev/vg1/lvdata4

step4.挂载目录

mount /dev/vg0/lvdata1 /data1

mount /dev/vg1/lvdata3 /data2

这里根据项目需求，我们只需要挂载两个目录即可。

step6配置本地磁盘

mkdir /data5

mkdir /data6

mkdir /data7

mkdir /data8

mkdir /data9

mkdir /data10

mkdir /data11

mount /dev/sdf1 /data5

mount /dev/sdg1 /data6

mount /dev/sdh1 /data7

mount /dev/sdi1 /data8

mount /dev/sdj1 /data9

mount /dev/sdk1 /data10

mount /dev/sdl1 /data11

step5.加到开机启动

vi /etc/rc.local

mount /dev/vg0/lvdata1 /data1

mount /dev/vg1/lvdata3 /data2

mount /dev/sdf1 /data5

mount /dev/sdg1 /data6

mount /dev/sdh1 /data7

mount /dev/sdi1 /data8

mount /dev/sdj1 /data9

mount /dev/sdk1 /data10

mount /dev/sdl1 /data11

[root@localhost rules.d]# vi /etc/fstab

#

# /etc/fstab

# Created by anaconda on Thu Dec 405:55:16 2014

#

# Accessible filesystems, by reference, aremaintained under '/dev/disk'

# See man pages fstab(5), findfs(8), mount(8)and/or blkid(8) for more info

#

UUID=20837b76-a9d5-4b7b-bd4c-a9469106bba6 / ext4 defaults 1 1

UUID=69d5918e-c1b6-4567-9e88-927dee78a4ac/boot ext4 defaults 1 2

UUID=3a8fc471-ad91-4c72-b5d4-d22301fce859swap swap defaults 0 0

tmpfs /dev/shm tmpfs defaults 0 0

devpts /dev/pts devpts gid=5,mode=620 0 0

sysfs /sys sysfs defaults 0 0

proc /proc proc defaults 0 0

/data1 /dev/mapper/vg0-lvdata1 ext4 defaults 0 0

/data2 /dev/mapper/vg1-lvdata3 ext4 defaults 0 0

/data5 /dev/sdf1 ext4 defaults 0 0

/data6 /dev/sdg1 ext4 defaults 0 0

/data7 /dev/sdh1 ext4 defaults 0 0

/data8 /dev/sdi1 ext4 defaults 0 0

/data9 /dev/sdj1 ext4 defaults 0 0

/data10 /dev/sdk1 ext4 defaults 0 0

/data11 /dev/sdl1 ext4 defaults 0 0