在linux 下配置RAC LVM
在linux 下配置RAC LVM
LINUX 双节点的RAC,其中一个节点在共享存储上建立了lvm，在另一个节点来激活.
配置环境：RH EL4 + Oracle 10g RAC
1、RAC1 的lvm 信息
[root@rac1 mapper]# lvdisplay
--- Logical volume ---
LV Name /dev/rootvg/lvocr
VG Name rootvg
LV UUID OrIiVb-Z8Bu-zWdB-VPUq-2BaK-oBdR-i3rHPn
LV Write Access read/write
LV Status available
# open 0
LV Size 500.00 MB
Current LE 125
Segments 1
Allocation inherit
Read ahead sectors 0
Block device 253:0
[root@rac1 mapper]# ls -l
total 0
crw------- 1 root root 10, 63 Jul 28 14:37 control
brw-rw---- 1 root disk 253, 0 Jul 28 17:44 rootvg-lvocr
[root@rac1 mapper]#
2、在另一个节点用mknod建立块设备文件
[root@rac2 ~]# mknod
mknod: too few arguments
Try `mknod --help' for more information.
[root@rac2 ~]# mknod --help
Usage: mknod [OPTION]... NAME TYPE [MAJOR MINOR]
Create the special file NAME of the given TYPE.
-Z, --context=CONTEXT set security context (quoted string)
Mandatory arguments to long options are mandatory for short options too.
-m, --mode=MODE set permission mode (as in chmod), not a=rw - umask
--help display this help and exit
--version output version information and exit
Both MAJOR and MINOR must be specified when TYPE is b, c, or u, and they
must be omitted when TYPE is p. If MAJOR or MINOR begins with 0x or 0X,
it is interpreted as hexadecimal; otherwise, if it begins with 0, as octal;
otherwise, as decimal. TYPE may be:
b create a block (buffered) special file
c, u create a character (unbuffered) special file
p create a FIFO
Report bugs to [email protected].
[root@rac2 ~]# cd /dev/mapper
[root@rac2 mapper]# mknod rootvg-lvocr b 253 0
[root@rac2 mapper]# ls -l
total 0
crw------- 1 root root 10, 63 Jul 28 14:38 control
brw-r--r-- 1 root root 253, 0 Jul 28 18:09 rootvg-lvocr
[root@rac2 mapper]# vgdisplay
No volume groups found
将两个节点系统重启：
在节点2 执行以下操作：
[root@rac2 mapper]# vgimport rootvg
/dev/cdrom: open failed: Read-only file system
/dev/cdrom: open failed: Read-only file system
Attempt to close device '/dev/cdrom' which is not open.
Volume group "rootvg" is not exported
[root@rac2 mapper]# ls
control rootvg-lvocr
[root@rac2 mapper]# vgchange -a n rootvg
0 logical volume(s) in volume group "rootvg" now active
[root@rac2 mapper]# vgchange -a y rootvg
1 logical volume(s) in volume group "rootvg" now active
[root@rac2 mapper]# lvdisplay
--- Logical volume ---
LV Name /dev/rootvg/lvocr
VG Name rootvg
LV UUID OrIiVb-Z8Bu-zWdB-VPUq-2BaK-oBdR-i3rHPn
LV Write Access read/write
LV Status available
# open 0
LV Size 500.00 MB
Current LE 125
Segments 1
Allocation inherit
Read ahead sectors 0
Block device 253:0
[root@rac2 mapper]# vgdisplay rootvg
--- Volume group ---
VG Name rootvg
System ID
Format lvm2
Metadata Areas 1
Metadata Sequence No 5
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 1
Open LV 0
Max PV 0
Cur PV 1
Act PV 1
VG Size 4.00 GB
PE Size 4.00 MB
Total PE 1023
Alloc PE / Size 125 / 500.00 MB
Free PE / Size 898 / 3.51 GB
VG UUID 1Mst0z-ZAmU-0uAp-vQC2-z1vD-ZABs-tc6I8f
在RAC2上建立一个lvm
[root@rac2 mapper]# lvcreate -L 500m -n lvora rootvg
Logical volume "lvora" created
[root@rac2 mapper]# ls -l
total 0
crw------- 1 root root 10, 63 Jul 28 14:38 control
brw-r--r-- 1 root root 253, 0 Jul 28 18:09 rootvg-lvocr
brw-rw---- 1 root disk 253, 1 Jul 28 18:16 rootvg-lvora
[root@rac2 mapper]#
在RAC1 激活lvm
[root@rac1 mapper]# ls -l
total 0
crw------- 1 root root 10, 63 Jul 28 14:37 control
brw-rw---- 1 root disk 253, 0 Jul 28 17:44 rootvg-lvocr
[root@rac1 mapper]# mknod rootvg-lvora b 253 1
[root@rac1 mapper]# ls -l
total 0
crw------- 1 root root 10, 63 Jul 28 14:37 control
brw-rw---- 1 root disk 253, 0 Jul 28 17:44 rootvg-lvocr
brw-r--r-- 1 root root 253, 1 Jul 28 18:17 rootvg-lvora
[root@rac1 mapper]# vgchange -a n rootvg
0 logical volume(s) in volume group "rootvg" now active
[root@rac1 mapper]# vgchange -a y rootvg
2 logical volume(s) in volume group "rootvg" now active
[root@rac1 mapper]# lvdisplay
--- Logical volume ---
LV Name /dev/rootvg/lvocr
VG Name rootvg
LV UUID OrIiVb-Z8Bu-zWdB-VPUq-2BaK-oBdR-i3rHPn
LV Write Access read/write
LV Status available
# open 0
LV Size 500.00 MB
Current LE 125
Segments 1
Allocation inherit
Read ahead sectors 0
Block device 253:0
--- Logical volume ---
LV Name /dev/rootvg/lvora
VG Name rootvg
LV UUID hmI83p-e0p0-bznb-IoT2-Er1j-6zzw-OM4Li4
LV Write Access read/write
LV Status available
# open 0
LV Size 500.00 MB
Current LE 125
Segments 1
Allocation inherit
Read ahead sectors 0
Block device 253:1
[root@rac1 mapper]#