oracle 9i dataguard 由MAXIMUM PERFORMANCE模式变为MAXIMUM PROTECTION

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oracle 9i dataguard 由MAXIMUM PERFORMANCE模式变为MAXIMUM PROTECTION

在主库 primary 做以下操作:
SQL> select protection_mode from v$database;
PROTECTION_MODE
--------------------
MAXIMUM PERFORMANCE
SQL> shutdown immediate;
Database closed.
Database dismounted.
ORACLE instance shut down.
SQL> startup nomount;
ORACLE instance started.
Total System Global Area 105979336 bytes
Fixed Size 454088 bytes
Variable Size 83886080 bytes
Database Buffers 20971520 bytes
Redo Buffers 667648 bytes
SQL> alter database mount exclusive;
Database altered.
SQL> alter database set standby database to maximize protection;
Database altered.
主库模式必须设置成lgwr传递方式,要不然设置不成功 日志中会记录以下内容:
LGWR: Primary database is in CLUSTER CONSISTENT mode
LGWR: Primary database is in MAXIMUM PROTECTION mode
LGWR: Destination LOG_ARCHIVE_DEST_2 is not serviced by LGWR
LGWR: Destination LOG_ARCHIVE_DEST_1 is not serviced by LGWR
SQL> alter system set log_archive_dest_2='service=test lgwr sync affirm';
System altered.
SQL> show parameter log_archive_dest_2;
NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
log_archive_dest_2 string service=test lgwr sync affirm
SQL> alter database open;
alter database open
*
ERROR at line 1:
ORA-03113: end-of-file on communication channel
这里启动出错,看日志错误内容:
Errors in file d:\oracle\admin\paul\bdump\paul_lgwr_3088.trc:
ORA-16086: standby database does not contain available standby log files
LGWR: Error 16086 disconnecting from destination LOG_ARCHIVE_DEST_2 standby host 'test'
这说明在备库一定要创建standby log 日志
在备库 standby 做以下操作:
SQL> alter database recover managed standby database disconnect from session;
Database altered.
SQL> alter database recover managed standby database cancel;
Database altered.
SQL> @ d:\create_slog.sql
Database altered.

Database altered.
这里创建两组

SQL> alter database recover managed standby database disconnect from session;
Database altered.
SQL>
主库 打开 做日志切换 看日志是否传过去
Disconnected from Oracle9i Enterprise Edition Release 9.2.0.8.0 - Production
With the Partitioning, OLAP and Oracle Data Mining options
JServer Release 9.2.0.8.0 - Production
C:\Documents and Settings\Paul Yi>sqlplus "/as sysdba"
SQL*Plus: Release 9.2.0.8.0 - Production on Fri Jun 6 14:10:45 2008
Copyright (c) 1982, 2002, Oracle Corporation. All rights reserved.
Connected to an idle instance.
SQL> startup;
ORACLE instance started.
Total System Global Area 105979336 bytes
Fixed Size 454088 bytes
Variable Size 83886080 bytes
Database Buffers 20971520 bytes
Redo Buffers 667648 bytes
Database mounted.
Database opened.
SQL> alter system switch logfile;
System altered.
SQL> select protection_mode from v$database;
PROTECTION_MODE
--------------------
MAXIMUM PROTECTION
SQL> archive log list;
Database log mode Archive Mode
Automatic archival Enabled
Archive destination d:\backup\
Oldest online log sequence 62
Next log sequence to archive 64
Current log sequence 64

SQL> alter system switch logfile;
System altered.
最新切换日志64,在备库进行查询
SQL> SELECT SEQUENCE#, FIRST_TIME, NEXT_TIME FROM V$ARCHIVED_LOG ORDER BY SEQUEN
CE#;
SEQUENCE# FIRST_TIM NEXT_TIME
---------- --------- ---------
52 06-JUN-08 06-JUN-08
53 06-JUN-08 06-JUN-08
54 06-JUN-08 06-JUN-08
55 06-JUN-08 06-JUN-08
56 06-JUN-08 06-JUN-08
57 06-JUN-08 06-JUN-08
58 06-JUN-08 06-JUN-08
59 06-JUN-08 06-JUN-08
60 06-JUN-08 06-JUN-08
61 06-JUN-08 06-JUN-08
62 06-JUN-08 06-JUN-08
SEQUENCE# FIRST_TIM NEXT_TIME
---------- --------- ---------
63 06-JUN-08 06-JUN-08
64 06-JUN-08 06-JUN-08
13 rows selected.
可以看到已传送过来 正常
测试数据库打开情况:
1.在主库打开情况下关闭备库:
oracle 9i r2 中:运行在lgwr最大保护模式下的备库,主库没有关闭的情况下不允许
关闭备库 也就是说,关闭数据库时 必须先关闭主库才能关闭备用库.
打开数据库情况刚好相反,备库没有mount standby database 而直接打开主库
是不允许的.在数据库打开阶段会报错
这时执行在备库执行关闭:
SQL> shutdown immediate;
ORA-01154: database busy. Open, close, mount, and dismount not allowed now
主库关闭时 备库才能正常关闭
打开数据库时的测试 如果备库没有mount standby database
备库:
SQL> startup nomount;
ORACLE instance started.
Total System Global Area 101785012 bytes
Fixed Size 454068 bytes
Variable Size 75497472 bytes
Database Buffers 25165824 bytes
Redo Buffers 667648 bytes
SQL>
而直接打开主库时会报错:
SQL> startup;
ORACLE instance started.
Total System Global Area 105979336 bytes
Fixed Size 454088 bytes
Variable Size 83886080 bytes
Database Buffers 20971520 bytes
Redo Buffers 667648 bytes
Database mounted.
ORA-03113: end-of-file on communication channel
日志中记录的错误内容如下:
LGWR: Error 16058 verifying archivelog destination LOG_ARCHIVE_DEST_2
LGWR: Continuing...
Fri Jun 06 15:40:56 2008
Errors in file d:\oracle\admin\paul\bdump\paul_lgwr_5272.trc:
ORA-16058: standby database instance is not mounted
备库:
SQL> alter database mount standby database;
Database altered.
主库:
SQL> startup;
ORACLE instance started.
Total System Global Area 105979336 bytes
Fixed Size 454088 bytes
Variable Size 83886080 bytes
Database Buffers 20971520 bytes
Redo Buffers 667648 bytes
Database mounted.
Database opened.
SQL>
所以总结如下:
需要关闭dataguard 时必须先正常关闭主库,才能关闭备库
启动dataguard时必须先启动备库到mount standby database 才能启动主库
[size=6]测试网络断开或从库宕机:
备库:
SQL> shutdown abort;
ORACLE instance shut down.
主库:
SQL> alter system switch logfile;

主库就hang住了
这时看主库alert.log 文件 记录
LNS0 started with pid=10, OS id=5252
Fri Jun 06 17:31:22 2008
LGWR: Error 1034 disconnecting from destination LOG_ARCHIVE_DEST_2 standby host 'test'
LGWR: Error 1034 attaching to RFS for reconnect
LNS0 started with pid=10, OS id=4356
Fri Jun 06 17:31:44 2008
LGWR: Error 1034 disconnecting from destination LOG_ARCHIVE_DEST_2 standby host 'test'
LGWR: Error 1034 attaching to RFS for reconnect
不断的连接
备库恢复正常:
SQL> startup nomount;
ORACLE instance started.
Total System Global Area 101785012 bytes
Fixed Size 454068 bytes
Variable Size 75497472 bytes
Database Buffers 25165824 bytes
Redo Buffers 667648 bytes
SQL> alter database mount standby database;
Database altered.
SQL> alter database recover managed standby database disconnect from session;
Database altered.
主库: 日志切换正常
SQL> alter system switch logfile;
System altered.
LGWR: RFS network connection re-established at host 'test' --重新建立链接
LGWR: RFS destination opened for reconnect at host 'test'
Creating archive destination LOG_ARCHIVE_DEST_2: 'test'
LGWR: Insufficient standby redo logfiles to archive thread 1 sequence 91
LGWR: Beginning to archive log 3 thread 1 sequence 91
Beginning log switch checkpoint up to RBA [0x5b.2.10], SCN: 0x0000.003eed03
Thread 1 advanced to log sequence 91
Current log# 3 seq# 91 mem# 0: D:\ORACLE\ORADATA\PAUL\REDO03.LOG
Fri Jun 06 17:33:30 2008
ARC0: Evaluating archive log 2 thread 1 sequence 90
ARC0: Beginning to archive log 2 thread 1 sequence 90
Creating archive destination LOG_ARCHIVE_DEST_1: 'D:\ARCHPAUL\1_90.DBF'
ARC0: Completed archiving log 2 thread 1 sequence 90
Fri Jun 06 17:33:33 2008
Completed checkpoint up to RBA [0x5b.2.10], SCN: 0x0000.003eed03

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