本篇文章为大家展示了oracle12c下rac如何扩容asm存储，内容简明扼要并且容易理解，绝对能使你眼前一亮，通过这篇文章的详细介绍希望你能有所收获。

1 rac 扩容asm存储

基本思路：

第一步：通过multipath -ll 命令找到 要加载的共享磁盘

第二步：将找到的共享盘，添加到绑定文件中（/etc/udev/rules.d/99-oracle.rules）

第三部：su – grid sqlplus “/as sysasm” 添加到数据库磁盘组中。

creatediskgroup data_dg25t external redundancy disk'/dev/data-disk05-2.5t';

multipath-ll

grid用户

creatediskgroup data_dg25t external redundancy disk'/dev/data-disk05-2.5t';

1.1 具体添加过程1.1.1 第一步：查找系统要添加的共享盘

[root@inmdb04~]# multipath -ll

mpathp(3600000e00d100000001007f4004f0000) dm-4 FUJITSU,ETERNUS_DX400

size=1000Gfeatures='0' hwhandler='0' wp=rw

`-+-policy='round-robin 0' prio=1 status=active

`- 3:0:0:14 sdp 8:240 active ready running

mpatho(3600000e00d100000001007f4004d0000) dm-2 FUJITSU,ETERNUS_DX400

size=1000Gfeatures='0' hwhandler='0' wp=rw

`-+-policy='round-robin 0' prio=1 status=active

`- 3:0:0:12 sdn 8:208 active ready running

3600000e00d100000001007f400100000dm-6 FUJITSU,ETERNUS_DX400

size=2.4Tfeatures='0' hwhandler='0' wp=rw

`-+-policy='round-robin 0' prio=1 status=enabled

`- 3:0:0:9sdk 8:160 failed ready running

mpathn(3600000e00d100000001007f4004e0000) dm-3 FUJITSU,ETERNUS_DX400

size=1000Gfeatures='0' hwhandler='0' wp=rw

`-+-policy='round-robin 0' prio=1 status=active

`- 3:0:0:13 sdo 8:224 active ready running

mpatha(3600605b0073a96901c63704a1a11425f) dm-5 IBM,ServeRAID M5015

size=557Gfeatures='0' hwhandler='0' wp=rw

`-+-policy='round-robin 0' prio=1 status=active

`- 0:2:0:0sda 8:0 active ready running

mpathm(3600000e00d100000001007f4000e0000) dm-0 FUJITSU,ETERNUS_DX400

size=1000Gfeatures='0' hwhandler='0' wp=rw

`-+-policy='round-robin 0' prio=1 status=active

`- 3:0:0:10 sdl 8:176 active ready running

3600000e00d100000001007f400110000dm-7 FUJITSU,ETERNUS_DX400

size=2.4Tfeatures='0' hwhandler='0' wp=rw

`-+-policy='round-robin 0' prio=1 status=enabled

`- 3:0:0:8sdj 8:144 failed ready running

mpathl(3600000e00d100000001007f4000f0000) dm-1 FUJITSU,ETERNUS_DX400

size=1000Gfeatures='0' hwhandler='0' wp=rw

`-+-policy='round-robin 0' prio=1 status=active

`- 3:0:0:11 sdm 8:192 active ready running

[root@inmdb04~]#

简化为：

[root@inmdb04~]# multipath -ll

mpathp(3600000e00d100000001007f4004f0000) dm-4 FUJITSU,ETERNUS_DX400

size=1000Gfeatures='0' hwhandler='0' wp=rw

mpatho(3600000e00d100000001007f4004d0000) dm-2 FUJITSU,ETERNUS_DX400

size=1000Gfeatures='0' hwhandler='0' wp=rw

mpathn(3600000e00d100000001007f4004e0000) dm-3 FUJITSU,ETERNUS_DX400

size=1000Gfeatures='0' hwhandler='0' wp=rw

mpathm(3600000e00d100000001007f4000e0000) dm-0 FUJITSU,ETERNUS_DX400

size=1000Gfeatures='0' hwhandler='0' wp=rw

mpathl(3600000e00d100000001007f4000f0000) dm-1 FUJITSU,ETERNUS_DX400

size=1000Gfeatures='0' hwhandler='0' wp=rw

要添加的是五个盘：

mpathp(3600000e00d100000001007f4004f0000)

mpatho(3600000e00d100000001007f4004d0000)

mpathn(3600000e00d100000001007f4004e0000)

mpathm(3600000e00d100000001007f4000e0000)

mpathl(3600000e00d100000001007f4000f0000)

1.1.4 添加到系统数据盘组中

alterdiskgroup data_dg add disk '/dev/data-disk05';

alterdiskgroup data_dg add disk '/dev/data-disk06';

alterdiskgroup data_dg add disk '/dev/data-disk07';

alterdiskgroup data_dg add disk '/dev/data-disk08';

alterdiskgroup data_dg add disk '/dev/data-disk09';

具体操作过程：

[grid@inmdb03~]$ sqlplus "/as sysasm"

SQL*Plus:Release 12.1.0.2.0 Production on Tue Nov 1 18:28:06 2016

Copyright(c) 1982, 2014, Oracle. All rights reserved.

Connectedto:

OracleDatabase 12c Enterprise Edition Release 12.1.0.2.0 - 64bit Production

With theReal Application Clusters and Automatic Storage Management options

SQL>alter diskgroup data_dg add disk '/dev/data-disk05';

Diskgroupaltered.

SQL>alter diskgroup data_dg add disk '/dev/data-disk06';

Diskgroupaltered.

SQL>select name,TOTAL_MB ,FREE_MB ,round((TOTAL_MB-FREE_MB)/TOTAL_MB*100,2)used_percent from v$asm_diskgroup order by used_percent desc ;

NAME TOTAL_MB FREE_MB USED_PERCENT

---------------------------------------- ---------- ------------

OCR_DG 15360 5432 64.64

DATA_DG 62423042395221 61.63

FRA_DG 1048576583997 44.31

SQL>alter diskgroup data_dg add disk '/dev/data-disk07';

Diskgroupaltered.

SQL>SQL> alter diskgroup data_dg add disk '/dev/data-disk08';

Diskgroupaltered.

SQL>alter diskgroup data_dg add disk '/dev/data-disk09';

Diskgroupaltered.

SQL>select name,TOTAL_MB ,FREE_MB ,round((TOTAL_MB-FREE_MB)/TOTAL_MB*100,2)used_percent from v$asm_diskgroup order by used_percent desc ;

NAME TOTAL_MB FREE_MB USED_PERCENT

---------------------------------------- ---------- ------------

OCR_DG 15360 5432 64.64

FRA_DG 1048576583997 44.31

DATA_DG 93143045467164 41.3

SQL>

1.1.4.1 如果是创建新的磁盘组那就是如下命令：

creatediskgroup data_dg25t external redundancy disk'/dev/data-disk05';

1.1.5 监控数据重新条带化操作视图。

select * from v$asm_operation

这个操作后，没有显示有内容

1.1.6 添加成功后

可以看到成功挂载的新盘已在磁盘组中。

Select *from v$asm_disk;

上述内容就是oracle12c下rac如何扩容asm存储，你们学到知识或技能了吗？如果还想学到更多技能或者丰富自己的知识储备，欢迎关注亿速云行业资讯频道。