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LVM划分
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1.划分说明
服务器对存储设备的访问采用多路径技术 （Linux Device Mapper Multipathing），多路径设备配置完毕后，会在/dev/mapper/ 发现mpthX的多路径设备，可以使用lvcreate将其中一个设备划分为一个物理卷。
本次扩容的日立裸存储设备共有900G*10空间，做RAID1+0后，实际可用存储为约为3T分6个pv （一个pv 500G），分6个卷组--oravg01-06，一个卷组下分一个PV。
Oracle各主要数据文件分配大小：
temp:80G undo:60G SAP:819G SMS:999G
BCA_YW:100G BCA_GW:100G APP:200G indx:200G
备注：划分时发现，对一台服务器划分到LV后，另一台也能识别相同的LV，但是VG处于不活动状态，需要进行激活。
2.创建PV
pvcreate /dev/mapper/mpath2
pvcreate/dev/mapper/mpath3
pvcreate/dev/mapper/mpath4
pvcreate/dev/mapper/mpath5
pvcreate/dev/mapper/mpath6
pvcreate/dev/mapper/mpath7
查看PV属性
[root@rac1 ~]#pvdisplay
"/dev/mpath/mpath2" is a newphysical volume of "500.00 GB"
--- NEW Physical volume ---
PV Name /dev/mpath/mpath2
VG Name
PV Size 500.00 GB
Allocatable NO
PE Size (KByte) 0
Total PE 0
Free PE 0
Allocated PE 0
PV UUID TtAWwc-5hZF-0ZLt-TVuP-Jn9f-n2FQ-oaLCDh
"/dev/mpath/mpath3" is a newphysical volume of "500.00 GB"
--- NEW Physical volume ---
PV Name /dev/mpath/mpath3
VG Name
PV Size 500.00 GB
Allocatable NO
PE Size (KByte) 0
Total PE 0
Free PE 0
Allocated PE 0
PV UUID GiUA3r-cHfQ-LF0m-FBQt-K0yK-0jbH-GayMhX
"/dev/mpath/mpath4" is a newphysical volume of "500.00 GB"
--- NEW Physical volume ---
PV Name /dev/mpath/mpath4
VG Name
PV Size 500.00 GB
Allocatable NO
PE Size (KByte) 0
Total PE 0
Free PE 0
Allocated PE 0
PV UUID HjaH7y-Zoy9-xl1N-m2QU-JeUI-QyzN-ZWutNq
"/dev/mpath/mpath5" is a newphysical volume of "500.00 GB"
--- NEW Physical volume ---
PV Name /dev/mpath/mpath5
VG Name
PV Size 500.00 GB
Allocatable NO
PE Size (KByte) 0
Total PE 0
Free PE 0
Allocated PE 0
PV UUID zJbntF-iZae-BTn6-fleK-PGKn-jvIr-GHLT0D
"/dev/mpath/mpath6" is a newphysical volume of "500.00 GB"
--- NEW Physical volume ---
PV Name /dev/mpath/mpath6
VG Name
PV Size 500.00 GB
Allocatable NO
PE Size (KByte) 0
Total PE 0
Free PE 0
Allocated PE 0
PV UUID KAt3j4-NnAP-C018-BUM1-Xfhv-UYY6-Zdy3PD
"/dev/mpath/mpath7" is a newphysical volume of "500.00 GB"
--- NEW Physical volume ---
PV Name /dev/mpath/mpath7
VG Name
PV Size 500.00 GB
Allocatable NO
PE Size (KByte) 0
Total PE 0
Free PE 0
Allocated PE 0
PV UUID q1I884-vCgj-EMb8-FwI3-1Oqn-CuGo-wjF7nW
3. 创建VG
创建6个VG，一个VG下分一个PV，默认PE=4M，一个VG 500G
[root@rac1 ~]# vgcreate oravg01 /dev/mpath/mpath2
Volume group"oravg01" successfully created
[root@rac1 ~]# vgcreate oravg02 /dev/mpath/mpath3
Volume group"oravg02" successfully created
[root@rac1 ~]# vgcreate oravg03 /dev/mpath/mpath4
Volume group"oravg03" successfully created
[root@rac1 ~]# vgcreate oravg04 /dev/mpath/mpath5
Volume group"oravg04" successfully created
[root@rac1 ~]# vgcreate oravg05 /dev/mpath/mpath6
Volume group"oravg05" successfully created
[root@rac1 ~]# vgcreate oravg06 /dev/mpath/mpath7
Volume group"oravg06" successfully created
查看VG
[root@rac1 ~]# vgdisplay
--- Volume group ---
VG Name oravg06
System ID
Format lvm2
Metadata Areas 1
Metadata Sequence No 1
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 0
Open LV 0
Max PV 0
Cur PV 1
Act PV 1
VG Size 500.00 GB
PE Size 4.00 MB
Total PE 127999
Alloc PE / Size 0 / 0
Free PE / Size 127999 / 500.00 GB
VG UUID wevGwC-kmhe-3ho9-4CRk-GVnt-hOvE-2qq93g
--- Volume group ---
VG Name oravg05
System ID
Format lvm2
Metadata Areas 1
Metadata Sequence No 1
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 0
Open LV 0
Max PV 0
Cur PV 1
Act PV 1
VG Size 500.00 GB
PE Size 4.00 MB
Total PE 127999
Alloc PE / Size 0 / 0
Free PE / Size 127999 / 500.00 GB
VG UUID P6pEjs-SHzZ-Rxql-XIwR-uOff-euw5-kPJpQg
--- Volume group ---
VG Name oravg04
System ID
Format lvm2
Metadata Areas 1
Metadata Sequence No 1
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 0
Open LV 0
Max PV 0
Cur PV 1
Act PV 1
VG Size 500.00 GB
PE Size 4.00 MB
Total PE 127999
Alloc PE / Size 0 / 0
Free PE / Size 127999 / 500.00 GB
VG UUID K9yT9I-21Wg-48Ye-k1TY-ge3F-354N-EGYuPc
--- Volume group ---
VG Name oravg03
System ID
Format lvm2
Metadata Areas 1
Metadata Sequence No 1
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 0
Open LV 0
Max PV 0
Cur PV 1
Act PV 1
VG Size 500.00 GB
PE Size 4.00 MB
Total PE 127999
Alloc PE / Size 0 / 0
Free PE / Size 127999 / 500.00 GB
VG UUID B4Nmcz-CEQK-yIL7-tn9j-SB03-e0GU-WUSlic
--- Volume group ---
VG Name oravg02
System ID
Format lvm2
Metadata Areas 1
Metadata Sequence No 1
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 0
Open LV 0
Max PV 0
Cur PV 1
Act PV 1
VG Size 500.00 GB
PE Size 4.00 MB
Total PE 127999
Alloc PE / Size 0 / 0
Free PE / Size 127999 / 500.00 GB
VG UUID 3ydc98-DgkI-P8F5-HlGd-B2xO-mX0o-eE3zsn
--- Volume group ---
VG Name oravg01
System ID
Format lvm2
Metadata Areas 1
Metadata Sequence No 1
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 0
Open LV 0
Max PV 0
Cur PV 1
Act PV 1
VG Size 500.00 GB
PE Size 4.00 MB
Total PE 127999
Alloc PE / Size 0 / 0
Free PE / Size 127999 / 500.00 GB
VG UUID Ei6ZDe-29bP-XARY-qpCe-Qsve-y9Py-YtaKUw
4. 创建LV
注：这里创建lv大小时，最好分配得比预先设计的大一些
依次创建LV（省略）
[root@rac1 ~]# lvcreate -L 512M oravg01
Logical volume "lvol0" created
扫描系统存在的LV
[root@rac1 ~]# lvscan
ACTIVE '/dev/oravg01/lvol0' [512.00 MB]inherit
查看VG属性
[root@rac1 ~]# vgdisplay -P oravg01
Partial mode. Incomplete logical volumes will be processed.
---Volume group ---
VGName oravg01
System ID
Format lvm2
Metadata Areas 1
Metadata Sequence No 39
VGAccess read/write
VGStatus resizable
MAXLV 0
CurLV 38
Open LV 0
MaxPV 0
CurPV 1
ActPV 1
VGSize 500.00 GB
PESize 4.00 MB
Total PE 127999
AllocPE / Size 121216 / 473.50 GB
Free PE / Size 6783 / 26.50 GB
VGUUID Ei6ZDe-29bP-XARY-qpCe-Qsve-y9Py-YtaKUw