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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。

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

multipath -ll

grid用户

create diskgroup 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=1000G features='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=1000G features='0' hwhandler='0' wp=rw

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

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

3600000e00d100000001007f400100000 dm-6 FUJITSU,ETERNUS_DX400

size=2.4T features='0' hwhandler='0' wp=rw

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

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

mpathn (3600000e00d100000001007f4004e0000) dm-3 FUJITSU,ETERNUS_DX400

size=1000G features='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=557G features='0' hwhandler='0' wp=rw

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

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

mpathm (3600000e00d100000001007f4000e0000) dm-0 FUJITSU,ETERNUS_DX400

size=1000G features='0' hwhandler='0' wp=rw

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

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

3600000e00d100000001007f400110000 dm-7 FUJITSU,ETERNUS_DX400

size=2.4T features='0' hwhandler='0' wp=rw

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

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

mpathl (3600000e00d100000001007f4000f0000) dm-1 FUJITSU,ETERNUS_DX400

size=1000G features='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=1000G features='0' hwhandler='0' wp=rw

mpatho (3600000e00d100000001007f4004d0000) dm-2 FUJITSU,ETERNUS_DX400

size=1000G features='0' hwhandler='0' wp=rw

mpathn (3600000e00d100000001007f4004e0000) dm-3 FUJITSU,ETERNUS_DX400

size=1000G features='0' hwhandler='0' wp=rw

mpathm (3600000e00d100000001007f4000e0000) dm-0 FUJITSU,ETERNUS_DX400

size=1000G features='0' hwhandler='0' wp=rw

mpathl (3600000e00d100000001007f4000f0000) dm-1 FUJITSU,ETERNUS_DX400

size=1000G features='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

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

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

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

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

alter diskgroup 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.

Connected to:

Oracle Database 12c Enterprise Edition Release 12.1.0.2.0 - 64bit Production

With the Real Application Clusters and Automatic Storage Management options

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

Diskgroup altered.

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

Diskgroup altered.

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                     6242304    2395221           61.63

FRA_DG                        1048576     583997           44.31

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

Diskgroup altered.

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

Diskgroup altered.

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

Diskgroup altered.

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                        1048576     583997           44.31

DATA_DG                     9314304    5467164            41.3

SQL>

1.1.4.1  如果是创建新的磁盘组那就是如下命令：

create diskgroup 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;

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