第11步：數據庫冗餘

目前在 ASM 上控制文件只有一份，須要給控制文件作鏡像

1. 
   
   1. 
      
      1. 查看當前控制文件

代碼 1

[root@sgdb1 ~]# su - oracle [oracle@sgdb1 ~]$ export ORACLE_SID=sgdb1   //第2個節點爲： export ORACLE_SID=sgdb2 [oracle@sgdb1 ~]$ sqlplus / as sysdba SQL> show parameter control_files NAME                              TYPE  VALUE ------------------------------------ ----------- ------------------------------ control_files                       string  +BJ_SGDB_DATA/sgdb/controlfile/current .256.887810989

2. 
   
   2. 
      
      2. 複製控制文件

（ 1 ）兩個節點分別關閉數據庫

代碼 2

[oracle@sgdb1 ~]$ sqlplus / as sysdba SQL> shutdown immediate;      Database closed. Database dismounted. ORACLE instance shut down.

代碼 3

[oracle@sgdb2 ~]$ sqlplus / as sysdba SQL> shutdown immediate;      Database closed. Database dismounted. ORACLE instance shut down.

（ 2 ）啓動數據庫到 nomount 狀態 （實例之一便可）

代碼 4

SQL> startup nomount; ORACLE instance started. Total System Global Area 1.0055E+10 bytes Fixed Size                  2261888 bytes Variable Size           5435821184 bytes Database Buffers     4596957184 bytes Redo Buffers            19742720 bytes 查看控制文件位置 SQL> show parameter control_files; NAME                              TYPE  VALUE ------------------------------------ ----------- ------------------------------ control_files                       string  +BJ_SGDB_DATA/sgdb/controlfile/current                                            .256.887810989

（ 3 ）使用 RMAN 複製控制文件 （實例之一便可）

代碼 5

[oracle@sgdb1 ~]$ rman target / RMAN> restore controlfile to '+BJ_SGDB_DATA' from '+BJ_SGDB_DATA/sgdb/controlfile/current.256.887810989';

（ 4 ）查看新生成的控制文件副本

注意：新生成的文件名目前沒有看到，能夠經過 grid 用戶，使用 asmcmd 查看

代碼 6

[grid@sgdb1 ~]$ export ORACLE_SID=+ASM1 [grid@sgdb1 ~]$ asmcmd ASMCMD> cd DATA/SGDB/CONTROLFILE ASMCMD> ls Current.256.887810989 current.269.887816799   顯然，新生成的文件名字爲 current.269.887816799

（ 5 ）修改 SPFILE

注意 RAC 不能像單實例那樣直接修改 pfile ，不要輕易使用 「create pfile from spfile;」 命令建立 PFILE 文件，所以仍是老老實實地修改 spfile 吧：

代碼 7

[oracle@sgdb1 ~]$ sqlplus / as sysdba 當前狀態應該已經爲 nomount SQL> select status from v$instance; STATUS ------------ STARTED 修改參數文件 SQL> alter system set control_files = '+BJ_SGDB_DATA/sgdb/controlfile/current.256.887810989', '+BJ_SGDB_DATA/sgdb/controlfile/current.269.887816799' scope = spfile; System altered.

（ 6 ）分別重啓兩個數據庫（ sgdb1 & sgdb2 ），查看控制文件

代碼 8

SQL> startup force; SQL> show parameter control_files; NAME                              TYPE  VALUE ------------------------------------ ----------- ------------------------------ control_files                       string  +BJ_SGDB_DATA/sgdb/controlfile/current                                            .256.887810989, +BJ_SGDB_DATA/sgdb/con                                            trolfile/current.269.887816799

2. 
   

   2. REDO LOG冗餘

目前 REDO LOG 一共有 8 組，每一個組只有一名成員，須要作鏡像

代碼 9

[oracle@sgdb1 ~]$ sqlplus / as sysdba 拷貝下面語句，執行添加成員 alter database add logfile member '+BJ_SGDB_DATA' to group 1; alter database add logfile member '+BJ_SGDB_DATA' to group 2; alter database add logfile member '+BJ_SGDB_DATA' to group 3; alter database add logfile member '+BJ_SGDB_DATA' to group 4; alter database add logfile member '+BJ_SGDB_DATA' to group 5; alter database add logfile member '+BJ_SGDB_DATA' to group 6; alter database add logfile member '+BJ_SGDB_DATA' to group 7; alter database add logfile member '+BJ_SGDB_DATA' to group 8;

終於，OracleRAC安裝完成！

==============================================================================

1.rman-00554:initialization of internal recovery manager package failed

rman-04005:error from target database:

ORA-12162:TNS:net service name is incorrectly specified

 

 

解決過程：

忘記了，下次在遇到留意下。

 

 

 

2.啓動RAC其中一個節點正常，啓動第二個節點報錯，提示以下：

SQL> startup force;

ORACLE instance started.

 

Total System Global Area 1068937216 bytes

Fixed Size            2260088 bytes

Variable Size          444597128 bytes

Database Buffers      616562688 bytes

Redo Buffers            5517312 bytes

ORA-01105: mount is incompatible with mounts by other instances

ORA-01606: parameter not identical to that of another mounted instance

 

解決過程：

以前的步驟修改SPFILE修改參數文件，應該兩個節點同時關閉，同時以nomount方式啓動，同時執行

alter system set control_files = '+BJ_SGDB_DATA/sgdb/controlfile/current.256.887810989', '+BJ_SGDB_DATA/sgdb/controlfile/current.269.887816799' scope = spfile;

System altered.

問題解決。