oracle RAC切换归档

1.1、主要步骤：  
2. 备份spfile，以防止参数修改失败导致数据库无法启动  
3. 修改集群参数cluster_database为false  
4. 启动单实例到mount状态  
5. 将数据库置于归档模式(alter database archivelog/noarchivelog)  
6. 修改集群参数cluster_database为true  
7. 关闭单实例  
8. 启动集群数据库  
9.  
10.2、环境   
11. oracle@bo2dbp:~> cat /etc/issue  
12.  
13. Welcome to SUSE Linux Enterprise Server 10 SP3 (x86_64) - Kernel \r (\l).  
14.  
15. oracle@bo2dbp:~> sqlplus -v  
16.  
17. SQL*Plus: Release 10.2.0.3.0 - Production  
18.   
19. 使用asm存储方式存放归档日志  
20.  
21.3、修改集群数据库到归档模式  
22. oracle@bo2dbp:~> export ORACLE_SID=ora10g1  
23. oracle@bo2dbp:~> sqlplus / as sysdba  
24.  
25. SQL*Plus: Release 10.2.0.3.0 - Production on Mon Dec 24 16:53:18 2012  
26.  
27. Copyright (c) 1982, 2006, Oracle.  All Rights Reserved.  
28.  
29. Connected to:  
30. Oracle Database 10g Release 10.2.0.3.0 - 64bit Production  
31. With the Real Application Clusters option  
32.  
33. SQL> archive log list;    -->查看当前数据库的归档模式  
34. Database log mode              No Archive Mode          -->非归档模式  
35. Automatic archival             Disabled  
36. Archive destination            USE_DB_RECOVERY_FILE_DEST  
37. Oldest online log sequence     59  
38. Current log sequence           60  
39.  
40. SQL> select instance_name,host_name,status from gv$instance;  
41.  
42. INSTANCE_NAME    HOST_NAME            STATUS  
43. ---------------- -------------------- ------------  
44. ora10g1          bo2dbp               OPEN  
45. ora10g2          bo2dbs               OPEN  
46.  
47. SQL> show parameter cluster      -->查看集群的参数,cluster_database为true表示为集群数据库，否则，非集群数据库  
48.  
49. NAME                                 TYPE        VALUE  
50. ------------------------------------ ----------- ------------------------------  
51. cluster_database                     boolean     TRUE  
52. cluster_database_instances           integer     2  
53. cluster_interconnects                string  
54.  
55. SQL> create pfile=‘/u01/oracle/db/dbs/ora10g_robin.ora‘ from spfile;  -->先备份spfile  
56.  
57. File created.  
58.  
59. SQL> alter system set cluster_database=false scope=spfile sid=‘*‘;  -->修改为非集群数据库，该参数为静态参数，需要使用scope=spfile  
60.  
61. System altered.  
62.  
63. oracle@bo2dbp:~> srvctl stop database -d ora10g                        -->关闭数据库  
64. oracle@bo2dbp:~> srvctl start instance -d ora10g -i ora10g1 -o mount   -->启动单个实例到mount状态  
65. oracle@bo2dbp:~> sqlplus / as sysdba  
66. SQL> select instance_name,status from v$instance;  
67.  
68. INSTANCE_NAME    STATUS  
69. ---------------- ------------  
70. ora10g1          MOUNTED  
71.  
72. SQL> alter database archivelog;                                       -->改变数据库到归档模式  
73.  
74. Database altered.  
75.  
76. SQL> alter system set cluster_database=true scope=spfile sid=‘*‘;    -->在将数据库改为集群模式  
77.  
78. System altered.  
79.  
80. SQL> ho srvctl stop instance -d ora10g -i ora10g1                     -->关闭当前实例  
81.  
82. SQL> ho srvctl start database -d ora10g                               -->启动集群数据库  
83.    
84. SQL> archive log list;  
85. ORA-03135: connection lost contact  
86. SQL> conn / as sysdba  
87. Connected.  
88. SQL> archive log list;                                                -->查看归档模式  
89. Database log mode              Archive Mode                           -->已经处于归档模式  
90. Automatic archival             Enabled                                -->自动归档  
91. Archive destination            USE_DB_RECOVERY_FILE_DEST              -->归档位置为参数DB_RECOVERY_FILE_DEST的值  
92. Oldest online log sequence     60                                     -->下面是sequence相关信息     
93. Next log sequence to archive   61  
94. Current log sequence           61  
95.  
96. SQL> show parameter db_recovery_file  
97.  
98. NAME                                 TYPE        VALUE  
99. ------------------------------------ ----------- ------------------------------  
100. db_recovery_file_dest                string      +REV  
101. db_recovery_file_dest_size           big integer 2G  
102.  

以下步骤在一台机器上操作。节点二保持down。在所有的操作完成后在打开节点二的数据库。。。

SQLPLUS>connect SYS/PASSWORD

SQLPLUS>ALTER SYSTEM SET CLUSTER_DATABASE=FALSE SCOPE=SPFILE;

SQLPLUS>shutdown immediate;

SQLPLUS>startup mount exclusive;

SQLPLUS>alter database noarchivelog;

SQLPLUS>ALTER SYSTEM SET CLUSTER_DATABASE=TRUE SCOPE=SPFILE;

SQLPLUS>shutdown immediate;

SQLPLUS>STARTUP

 

非归档改为归档

SQLPLUS>connect SYS/PASSWORD

SQLPLUS>ALTER SYSTEM SET CLUSTER_DATABASE=FALSE SCOPE=SPFILE;

SQLPLUS>shutdown immediate;

SQLPLUS>startup mount exclusive;

SQLPLUS>alter database archivelog;

SQLPLUS>ALTER SYSTEM SET CLUSTER_DATABASE=TRUE SCOPE=SPFILE;

SQLPLUS>shutdown immediate;

SQLPLUS>STARTUP

testdb101@db10a  /home/oracle$ srvctl stop instance -d testdb10 -i testdb101
/u01/crs1020/jdk/jre/bin/java: error while loading shared libraries: libpthread.so.0: cannot open shared object file: No such file or directory


alert日志里面
db_recovery_file_dest_size of 2048 MB is 10.55% used. This is a
user-specified limit on the amount of space that will be used by this
database for recovery-related files, and does not reflect the amount of
space available in the underlying filesystem or ASM diskgroup.