测试目的： 单实例数据库转换为RAC数据库
测试环境：Oracle 11.2.0.4
测试方法：手工转换
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首先，安装一套RAC环境，并把单实例数据库通过通过rman还原到这个环境（通常如果是生产环境，我们会搭建从RAC到单实例数据库的ADG，以减少停机时间）。
然后生成一个源库（单实例数据库）spfile：
startup pfile=/home/oracle/lunar/spfile.lunardb.tmp 08:07:25 sys@lunardb>show parameter spfile NAME TYPE VALUE ------------------------------------ ----------- ------------------------------ spfile string 08:08:38 sys@lunardb>
注意检查tnsnames.ora中用于local_listener参数的两个配置条目是否正确：
LISTENER_RAC1=(ADDRESS = (PROTOCOL = TCP)(HOST = dm0101-vip.lunar.com)(PORT = 1521)) LISTENER_RAC2=(ADDRESS = (PROTOCOL = TCP)(HOST = dm0102-vip.lunar.com)(PORT = 1521))
修改刚才备份的pfile文件（/home/oracle/lunar/spfile.lunardb.tmp），添加RAC相关配置：
*.audit_file_dest='/u01/app/oracle/admin/lunardb/adump' *.audit_trail='NONE' *.compatible='11.2.0.3.0' *.control_files='+DATADG/lunardb/control01.ctl','+DATADG/lunardb/control02.ctl' *.db_block_size=8192 *.db_domain='' *.db_files=2000 *.db_name='lunardb' *.db_recovery_file_dest='+RECODG' *.db_recovery_file_dest_size=336870912000 *.db_unique_name='lunardb' *.deferred_segment_creation=FALSE *.diagnostic_dest='/u01/app/oracle' *.dispatchers='(PROTOCOL=TCP) (SERVICE=lunardbXDB)' *.log_archive_dest_1='LOCATION=USE_DB_RECOVERY_FILE_DEST VALID_FOR=(ALL_LOGFILES,ALL_ROLES) DB_UNIQUE_NAME=lunardb' *.log_archive_dest_state_1='ENABLE' *.open_cursors=500 *.pga_aggregate_target=1059552256 *.processes=500 *.remote_login_passwordfile='EXCLUSIVE' *.resource_manager_plan='' *.session_cached_cursors=2000 *.sga_target=0 *.standby_file_management='AUTO' *.undo_tablespace='UNDOTBS1' #*.use_large_pages='ONLY' *.db_cache_size=3g *.shared_pool_size=3g *.streams_pool_size=28m *.java_pool_size=200m *.log_buffer=37108864 *.job_queue_processes=20 *.cluster_database=true *.cluster_database_instances=2 *.undo_management=AUTO *.db_create_file_dest='+DATADG' *.db_create_online_log_dest_1='+RECODG' lunardb1.undo_tablespace='UNDOTBS1' lunardb2.undo_tablespace='UNDOTBS2' lunardb1.instance_number=1 lunardb2.instance_number=2 lunardb1.instance_name=lunardb1 lunardb2.instance_name=lunardb2 lunardb1.thread=1 lunardb2.thread=2 lunardb1.local_listener=LISTENER_RAC1 lunardb2.local_listener=LISTENER_RAC2
使用这个pfile启动数据库：
08:26:59 @>startup pfile=/home/oracle/lunar/spfile.lunardb.tmp ORACLE instance started. Total System Global Area 6881869824 bytes Fixed Size 2266064 bytes Variable Size 3573550128 bytes Database Buffers 3221225472 bytes Redo Buffers 84828160 bytes Database mounted. Database opened. 08:27:30 @>
添加thread2：
08:27:30 @>alter database add logfile thread 2
08:28:16 2 group 17 ('+RECODG') size 1024m,
08:28:16 3 group 18 ('+RECODG') size 1024m,
08:28:16 4 group 19 ('+RECODG') size 1024m,
group 20 ('+RECODG') size 1024m,
08:28:16 5 08:28:16 6 group 21 ('+RECODG') size 1024m,
08:28:16 7 group 22 ('+RECODG') size 1024m,
group 23 ('+RECODG') size 1024m,
08:28:16 8 08:28:16 9 group 24 ('+RECODG') size 1024m,
group 25 ('+RECODG') size 1024m,
08:28:16 10 08:28:16 11 group 26 ('+RECODG') size 1024m,
08:28:16 12 group 27 ('+RECODG') size 1024m,
group 28 ('+RECODG') size 1024m,
08:28:16 13 08:28:16 14 group 29 ('+RECODG') size 1024m,
08:28:16 15 group 30 ('+RECODG') size 1024m,
08:28:16 16 group 31 ('+RECODG') size 1024m,
08:28:16 17 group 32 ('+RECODG') size 1024m
;08:28:16 18
Database altered.
Elapsed: 00:00:28.51
08:28:46 @>
添加实例2的undo表空间：
08:28:46 @>CREATE UNDO TABLESPACE UNDOTBS2 DATAFILE '+DATADG' SIZE 10480m ; Tablespace created. Elapsed: 00:00:09.87 08:29:11 @>
启用实例2（thread2）：
08:29:11 @>alter database enable public thread 2; Database altered. Elapsed: 00:00:00.59 08:29:29 @> 1
创建spfile：08:33:58 @>create spfile='+DATADG' from pfile='/home/oracle/lunar/spfile.lunardb.tmp'; File created. Elapsed: 00:00:00.21 08:35:30 @>使用grid用户查看：
ASMCMD> ls spfile.3296.878718931 ASMCMD> pwd +datadg/lunardb/PARAMETERFILE ASMCMD>修改initlunardb1.ora 文件：
[oracle@dm01db01 dbs]$ cat initlunardb1.ora SPFILE='+datadg/lunardb/PARAMETERFILE/spfile.3296.878718931' [oracle@dm01db01 dbs]$检查数据库：
08:42:07 sys@lunardb>show parameter spfile NAME TYPE VALUE ------------------------------------ ----------- ------------------------------ spfile string +DATADG/lunardb/parameterfile/spf ile.3296.878718931 08:42:11 sys@lunardb>show parameter cluster NAME TYPE VALUE ------------------------------------ ----------- ------------------------------ cluster_database boolean TRUE cluster_database_instances integer 2 cluster_interconnects string 08:42:14 sys@lunardb>执行@?/rdbms/admin/catclust.sql，这个过程按照文档即可，没啥说的，执行完了检查日志，看看是否有报错。
然后启动数据库，检查2个数据库实例是否都正常了SYS@lunardb2>startup ORACLE instance started. Total System Global Area 6881869824 bytes Fixed Size 2266064 bytes Variable Size 3573550128 bytes Database Buffers 3221225472 bytes Redo Buffers 84828160 bytes Database mounted. Database opened. SYS@lunardb2>select * from v$active_instances; INST_NUMBER INST_NAME ---------------- ------------------------------------------------------------------------------------------------------------------------ 1 dm01db01.lunar.com:lunardb1 2 dm01db02.lunar.com:lunardb2 Elapsed: 00:00:00.00 SYS@lunardb2> SYS@lunardb2>show parameter spfile NAME TYPE VALUE ------------------------------------ ----------- ------------------------------ spfile string +DATADG/lunardb/parameterfile/spf ile.3296.878718931 SYS@lunardb2>把数据库实例添加到CRS中：
[oracle@dm01db01 ~]$ srvctl config database -d lunardb PRCD-1120 : The resource for database lunardb could not be found. PRCR-1001 : Resource ora.lunardb.db does not exist [oracle@dm01db01 ~]$ [oracle@dm01db01 ~]$ srvctl add database -d lunardb -o /u01/app/oracle/product/11.2.0.4/dbhome_1 [oracle@dm01db01 ~]$ srvctl add instance -d lunardb -n dm01db01 -i lunardb1 [oracle@dm01db01 ~]$ srvctl add instance -d lunardb -n dm01db02 -i lunardb2 [oracle@dm01db01 ~]$ srvctl config database -d lunardb Database unique name: lunardb Database name: Oracle home: /u01/app/oracle/product/11.2.0.4/dbhome_1 Oracle user: oracle Spfile: Domain: Start options: open Stop options: immediate Database role: PRIMARY Management policy: AUTOMATIC Server pools: lunardb Database instances: lunardb1,lunardb2 Disk Groups: Mount point paths: Services: Type: RAC Database is administrator managed [oracle@dm01db01 ~]$ [oracle@dm01db01 ~]$ srvctl modify database -d lunardb -a DATADG,RECODG [oracle@dm01db01 ~]$ srvctl modify database -d lunardb -p '+DATADG/lunardb/parameterfile/spfile.3296.878718931' [oracle@dm01db01 ~]$ srvctl config database -d lunardb Database unique name: lunardb Database name: Oracle home: /u01/app/oracle/product/11.2.0.4/dbhome_1 Oracle user: oracle Spfile: +DATADG/lunardb/parameterfile/spfile.3296.878718931 Domain: Start options: open Stop options: immediate Database role: PRIMARY Management policy: AUTOMATIC Server pools: lunardb Database instances: lunardb1,lunardb2 Disk Groups: DATADG,RECODG Mount point paths: Services: Type: RAC Database is administrator managed [oracle@dm01db01 ~]$
