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switchover physical DB怎样互换primary DB

发布时间：2021-12-20 14:29:21 作者：柒染
来源：亿速云 阅读：157

switchover physical DB怎样互换primary DB，相信很多没有经验的人对此束手无策，为此本文总结了问题出现的原因和解决方法，通过这篇文章希望你能解决这个问题。

PS：这一些实验是建立在我之前博客实验的基础上的

为什么要先alter 先切主库  再切备库，
因为如果先切备库的话，那么主库的一些日志可能备库收不到，导致不一致的情况发生

先切主库------>standby DB 切换之后主库是断开close的，重新open后查看其状态

  1. 20:53:33 SYS @ slow >select name,database_role,protection_mode,switchover_status from v$database;


  3. NAME      DATABASE_ROLE    PROTECTION_MODE    SWITCHOVER_STATUS

  4. --------- ---------------- -------------------- --------------------

  5. SLOW     PRIMARY       MAXIMUM AVAILABILITY TO STANDBY


  7. 1 row selected.


  9. Elapsed: 00:00:00.00

  10. 20:55:15 SYS @ slow >edit

  11. Wrote file afiedt.buf


  13.   1* select username,sid,serial# from v$session where username is not null

  14. 20:55:24 SYS @ slow >r

  15.   1* select username,sid,serial# from v$session where username is not null


  17. USERNAME                  SID    SERIAL#

  18. ------------------------------ ---------- ----------

  19. SYS                    1       5


  21. 1 row selected.


  23. Elapsed: 00:00:00.01

  24. 20:55:25 SYS @ slow >r

  25.   1* select username,sid,serial# from v$session where username is not null


  27. USERNAME                  SID    SERIAL#

  28. ------------------------------ ---------- ----------

  29. SYS                    1       5

  30. SCOTT                       41      47


  32. 2 rows selected.


  34. Elapsed: 00:00:00.00

  35. 20:56:25 SYS @ slow >alter database commit to switchover to standby;


  37. Database altered.


  39. Elapsed: 00:00:01.89

  40. 20:57:05 SYS @ slow >select name,database_role,protection_mode,switchover_status from v$database;

  41. select name,database_role,protection_mode,switchover_status from v$database

  42. *

  43. ERROR at line 1:

  44. ORA-01034: ORACLE not available

  45. Process ID: 5713

  46. Session ID: 1 Serial number: 5



  49. Elapsed: 00:00:00.00

  50. 20:58:08 SYS @ slow >select status from v$instance;

  51. select status from v$instance

  52. *

  53. ERROR at line 1:

  54. ORA-01034: ORACLE not available

  55. Process ID: 5713

  56. Session ID: 1 Serial number: 5



  59. Elapsed: 00:00:00.00

  60. 20:58:46 SYS @ slow >startup

  61. ORACLE instance started.


  63. Total System Global Area  521936896 bytes

  64. Fixed Size            2254824 bytes

  65. Variable Size          377489432 bytes

  66. Database Buffers      138412032 bytes

  67. Redo Buffers            3780608 bytes

  68. Database mounted.

  69. Database opened.

  70. 21:07:19 SYS @ slow >select name,open_mode,database_role,protection_mode,switchover_status from v$database;


  72. NAME      OPEN_MODE           DATABASE_ROLE    PROTECTION_MODE      SWITCHOVER_STATUS

  73. --------- -------------------- ---------------- -------------------- --------------------

  74. SLOW      READ ONLY           PHYSICAL STANDBY MAXIMUM AVAILABILITY TO PRIMARY


  76. 1 row selected.


  78. Elapsed: 00:00:00.01

  79. 21:07:55 SYS @ slow >recover managed standby database disconnect;

  80. Media recovery complete.

  81. 21:08:35 SYS @ slow >select name,open_mode,database_role,protection_mode,switchover_status from v$database;


  83. NAME      OPEN_MODE           DATABASE_ROLE    PROTECTION_MODE      SWITCHOVER_STATUS

  84. --------- -------------------- ---------------- -------------------- --------------------

  85. SLOW      READ ONLY WITH APPLY PHYSICAL STANDBY MAXIMUM AVAILABILITY TO PRIMARY


  87. 1 row selected.


  89. Elapsed: 00:00:00.00

  90. 21:09:02 SYS @ slow >

再切换备库----->primary DB  备库mount状态下操作  成功！！！

  1. 20:52:21 SYS @ gotime >select name,database_role,protection_mode,switchover_status from v$database;


  3. NAME      DATABASE_ROLE    PROTECTION_MODE    SWITCHOVER_STATUS

  4. --------- ---------------- -------------------- --------------------

  5. SLOW      PHYSICAL STANDBY MAXIMUM AVAILABILITY NOT ALLOWED


  7. 1 row selected.


  9. Elapsed: 00:00:00.01

  10. 20:53:12 SYS @ gotime >r

  11.   1* select name,database_role,protection_mode,switchover_status from v$database


  13. NAME      DATABASE_ROLE    PROTECTION_MODE    SWITCHOVER_STATUS

  14. --------- ---------------- -------------------- --------------------

  15. SLOW      PHYSICAL STANDBY MAXIMUM AVAILABILITY NOT ALLOWED


  17. 1 row selected.


  19. Elapsed: 00:00:00.00

  20. 20:59:16 SYS @ gotime >select username,sid from v$session where username is not null;


  22. USERNAME                  SID

  23. ------------------------------ ----------

  24. SYS                       24


  26. 1 row selected.


  28. Elapsed: 00:00:00.01

  29. 21:02:26 SYS @ gotime >alter database commit to switchover to primary with session shutdown;

  30. alter database commit to switchover to primary with session shutdown

  31. *

  32. ERROR at line 1:

  33. ORA-16139: media recovery required



  36. Elapsed: 00:00:00.01

  37. 21:03:18 SYS @ gotime >recover managed standby database disconnect;

  38. Media recovery complete.

  39. 21:03:51 SYS @ gotime >alter database commit to switchover to primary with session shutdown;


  41. Database altered.


  43. Elapsed: 00:00:02.04

  44. 21:05:00 SYS @ gotime >select name,database_role,protection_mode,switchover_status from v$database;


  46. NAME      DATABASE_ROLE    PROTECTION_MODE    SWITCHOVER_STATUS

  47. --------- ---------------- -------------------- --------------------

  48. SLOW     PRIMARY       MAXIMUM AVAILABILITY NOT ALLOWED


  50. 1 row selected.


  52. Elapsed: 00:00:00.01

  53. 21:05:12 SYS @ gotime >alter database open;


  55. Database altered.


  57. Elapsed: 00:00:00.58

  58. 21:05:45 SYS @ gotime >select name,database_role,protection_mode,switchover_status from v$database;


  60. NAME      DATABASE_ROLE    PROTECTION_MODE    SWITCHOVER_STATUS

  61. --------- ---------------- -------------------- --------------------

  62. SLOW     PRIMARY       MAXIMUM AVAILABILITY FAILED DESTINATION


  64. 1 row selected.


  66. Elapsed: 00:00:00.01

  67. 21:06:13 SYS @ gotime >


--------------------------------------但是，switchover_status是failed destination 状态------------------------------------------

switchover之后的备库slow，重新启动listener

  1. [oracle@slow ~]$ lsnrctl stop


  3. LSNRCTL for Linux: Version 11.2.0.4.0 - Production on 13-JAN-2018 21:31:12


  5. Copyright (c) 1991, 2013, Oracle. All rights reserved.


  7. Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=slow)(PORT=1521)))

  8. TNS-12541: TNS:no listener

  9.  TNS-12560: TNS:protocol adapter error

  10.   TNS-00511: No listener

  11.    Linux Error: 111: Connection refused

  12. [oracle@slow ~]$ lsnrctl start


  14. LSNRCTL for Linux: Version 11.2.0.4.0 - Production on 13-JAN-2018 21:31:20


  16. Copyright (c) 1991, 2013, Oracle. All rights reserved.


  18. Starting /u01/app/oracle/product/11.2.0/dbhome_1/bin/tnslsnr: please wait...


  20. TNSLSNR for Linux: Version 11.2.0.4.0 - Production

  21. System parameter file is /u01/app/oracle/product/11.2.0/dbhome_1/network/admin/listener.ora

  22. Log messages written to /u01/app/oracle/diag/tnslsnr/slow/listener/alert/log.xml

  23. Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=slow)(PORT=1521)))


  25. Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=slow)(PORT=1521)))

  26. STATUS of the LISTENER

  27. ------------------------

  28. Alias                     LISTENER

  29. Version                   TNSLSNR for Linux: Version 11.2.0.4.0 - Production

  30. Start Date 13-JAN-2018 21:31:20

  31. Uptime                    0 days 0 hr. 0 min. 0 sec

  32. Trace Level off

  33. Security ON: Local OS Authentication

  34. SNMP OFF

  35. Listener Parameter File /u01/app/oracle/product/11.2.0/dbhome_1/network/admin/listener.ora

  36. Listener Log File /u01/app/oracle/diag/tnslsnr/slow/listener/alert/log.xml

  37. Listening Endpoints Summary...

  38.   (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=slow)(PORT=1521)))

  39. The listener supports no services

  40. The command completed successfully

  41. [oracle@slow ~]$ lsnrctl status


  43. LSNRCTL for Linux: Version 11.2.0.4.0 - Production on 13-JAN-2018 21:31:23


  45. Copyright (c) 1991, 2013, Oracle. All rights reserved.


  47. Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=slow)(PORT=1521)))

  48. STATUS of the LISTENER

  49. ------------------------

  50. Alias                     LISTENER

  51. Version                   TNSLSNR for Linux: Version 11.2.0.4.0 - Production

  52. Start Date 13-JAN-2018 21:31:20

  53. Uptime                    0 days 0 hr. 0 min. 2 sec

  54. Trace Level off

  55. Security ON: Local OS Authentication

  56. SNMP OFF

  57. Listener Parameter File /u01/app/oracle/product/11.2.0/dbhome_1/network/admin/listener.ora

  58. Listener Log File /u01/app/oracle/diag/tnslsnr/slow/listener/alert/log.xml

  59. Listening Endpoints Summary...

  60.   (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=slow)(PORT=1521)))

  61. The listener supports no services

  62. The command completed successfully

关闭slow备库，再打开mount状态

  1. 21:28:36 SYS @ slow >shutdown immediate;

  2. Database closed.

  3. Database dismounted.

  4. ORACLE instance shut down.

  5. 21:28:53 SYS @ slow >startup mount;

  6. ORACLE instance started.


  8. Total System Global Area  521936896 bytes

  9. Fixed Size            2254824 bytes

  10. Variable Size          377489432 bytes

  11. Database Buffers      138412032 bytes

  12. Redo Buffers            3780608 bytes

  13. Database mounted.

  14. 21:29:08 SYS @ slow >

等slow备库重新启动之后，状态为ready了

  1. [oracle@slow ~]$ lsnrctl status


  3. LSNRCTL for Linux: Version 11.2.0.4.0 - Production on 13-JAN-2018 21:32:05


  5. Copyright (c) 1991, 2013, Oracle. All rights reserved.


  7. Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=slow)(PORT=1521)))

  8. STATUS of the LISTENER

  9. ------------------------

  10. Alias LISTENER

  11. Version TNSLSNR for Linux: Version 11.2.0.4.0 - Production

  12. Start Date 13-JAN-2018 21:31:20

  13. Uptime 0 days 0 hr. 0 min. 44 sec

  14. Trace Level off

  15. Security ON: Local OS Authentication

  16. SNMP OFF

  17. Listener Parameter File /u01/app/oracle/product/11.2.0/dbhome_1/network/admin/listener.ora

  18. Listener Log File /u01/app/oracle/diag/tnslsnr/slow/listener/alert/log.xml

  19. Listening Endpoints Summary...

  20.   (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=slow)(PORT=1521)))

  21. Services Summary...

  22. Service "slow" has 1 instance(s).

  23.   Instance "slow", status READY, has 1 handler(s) for this service...

  24. The command completed successfully

  25. [oracle@slow ~]$

现在的主库gotime这边重启listener

  1. [grid@sink ~]$ lsnrctl stop


  3. LSNRCTL for Linux: Version 11.2.0.4.0 - Production on 13-JAN-2018 21:31:41


  5. Copyright (c) 1991, 2013, Oracle. All rights reserved.


  7. Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=sink)(PORT=1521)))

  8. The command completed successfully

  9. [grid@sink ~]$ lsnrctl start


  11. LSNRCTL for Linux: Version 11.2.0.4.0 - Production on 13-JAN-2018 21:31:46


  13. Copyright (c) 1991, 2013, Oracle. All rights reserved.


  15. Starting /u01/11.2.0/grid/bin/tnslsnr: please wait...


  17. TNSLSNR for Linux: Version 11.2.0.4.0 - Production

  18. System parameter file is /u01/11.2.0/grid/network/admin/listener.ora

  19. Log messages written to /u01/app/grid/diag/tnslsnr/sink/listener/alert/log.xml

  20. Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=sink)(PORT=1521)))


  22. Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=sink)(PORT=1521)))

  23. STATUS of the LISTENER

  24. ------------------------

  25. Alias                     LISTENER

  26. Version                   TNSLSNR for Linux: Version 11.2.0.4.0 - Production

  27. Start Date 13-JAN-2018 21:31:46

  28. Uptime                    0 days 0 hr. 0 min. 0 sec

  29. Trace Level off

  30. Security ON: Local OS Authentication

  31. SNMP OFF

  32. Listener Parameter File /u01/11.2.0/grid/network/admin/listener.ora

  33. Listener Log File /u01/app/grid/diag/tnslsnr/sink/listener/alert/log.xml

  34. Listening Endpoints Summary...

  35.   (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=sink)(PORT=1521)))

  36. Services Summary...

  37. Service "gotime" has 1 instance(s).

  38.   Instance "gotime", status UNKNOWN, has 1 handler(s) for this service...

  39. The command completed successfully

  40. [grid@sink ~]$

gotime主库重新启动，到open

  1. 21:32:12 SYS @ gotime >startup force;

  2. ORACLE instance started.


  4. Total System Global Area  521936896 bytes

  5. Fixed Size            2254824 bytes

  6. Variable Size          377489432 bytes

  7. Database Buffers      138412032 bytes

  8. Redo Buffers            3780608 bytes

  9. Database mounted.

  10. Database opened.

  11. 21:32:35 SYS @ gotime >

switchover之后的备库slow，查询其状态，not allowed，正常了！！

  1. 21:29:08 SYS @ slow >recover managed standby database disconnect;

  2. Media recovery complete.

  3. 21:29:32 SYS @ slow >select name,open_mode,database_role,protection_mode,switchover_status from v$database;


  5. NAME      OPEN_MODE           DATABASE_ROLE    PROTECTION_MODE      SWITCHOVER_STATUS

  6. --------- -------------------- ---------------- -------------------- --------------------

  7. SLOW      MOUNTED           PHYSICAL STANDBY MAXIMUM AVAILABILITY NOT ALLOWED


  9. 1 row selected.


  11. Elapsed: 00:00:00.01

  12. 21:33:16 SYS @ slow >

在查询状态，为to standby了，正常了！！

  1. 21:32:35 SYS @ gotime >select name,open_mode,database_role,protection_mode,switchover_status from v$database

  2. 21:32:45   2 ;


  4. NAME      OPEN_MODE           DATABASE_ROLE    PROTECTION_MODE      SWITCHOVER_STATUS

  5. --------- -------------------- ---------------- -------------------- --------------------

  6. SLOW      READ WRITE     PRIMARY        MAXIMUM AVAILABILITY TO STANDBY


  8. 1 row selected.


  10. Elapsed: 00:00:00.02

  11. 21:32:47 SYS @ gotime >

看完上述内容，你们掌握switchover physical DB怎样互换primary DB的方法了吗？如果还想学到更多技能或想了解更多相关内容，欢迎关注亿速云行业资讯频道，感谢各位的阅读！

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