Oracle 11.2.0.4.0 Dataguard部署和日常维护(7)

1. 设置备库的闪回目录

show parameter db_recovery_file;NAME                     　　　　　　　　TYPE                   　　　　　　VALUE
------------------------------------ --------------------------------- -------------------------------------------
db_recovery_file_dest             　　 string                   　　　　 /u01/app/oracle/fast_recovery_area
db_recovery_file_dest_size         　　big integer                      4G

2. 开启备库的闪回功能

select flashback_on from v$database;FLASHBACK_ON
------------------------------------------------------
NOalter database flashback on;alter database flashback on
*
ERROR at line 1:
ORA-01153: an incompatible media recovery is activealter database recover managed standby database cancel;
alter database flashback on;
select flashback_on from v$database;FLASHBACK_ON
------------------------------------------------------
YESalter database recover managed standby database using current logfile disconnect from session;

3. 检查主备库同步状态

on primary

select ads.dest_id,max(sequence#) "Current Sequence",max(log_sequence) "Last Archived"from v$archived_log al, v$archive_dest ad, v$archive_dest_status adswhere ad.dest_id=al.dest_idand al.dest_id=ads.dest_idand al.resetlogs_change#=(select max(resetlogs_change#) from v$archived_log )group by ads.dest_id;DEST_ID Current Sequence Last Archived
---------- ---------------- -------------1         79           792         79           80

on standby

select al.thrd "Thread", almax "Last Seq Received", lhmax "Last Seq Applied"from (select thread# thrd, max(sequence#) almaxfrom v$archived_logwhere resetlogs_change#=(select resetlogs_change# from v$database)group by thread#) al,(select thread# thrd, max(sequence#) lhmaxfrom v$log_historywhere resetlogs_change#=(select resetlogs_change# from v$database)group by thread#) lhwhere al.thrd = lh.thrd;Thread Last Seq Received Last Seq Applied
---------- ----------------- ----------------1          79           79

4. 取消备库的恢复进程

select process,status from v$managed_standby;PROCESS             STATUS
------------------- ------------------------------------
ARCH                CLOSING
ARCH                CLOSING
ARCH                CONNECTED
ARCH                CLOSING
RFS                 IDLE
RFS                 IDLE
RFS                 IDLE
MRP0                APPLYING_LOGalter database recover managed standby database cancel;select process,status from v$managed_standby;PROCESS             STATUS
------------------- ------------------------------------
ARCH                CLOSING
ARCH                CLOSING
ARCH                CONNECTED
ARCH                CLOSING
RFS                 IDLE
RFS                 IDLE
RFS                 IDLE

5. 创建备库的还原点

create restore point before_open_standby guarantee flashback database;
select name from v$restore_point;NAME
--------------------------------------------------
BEFORE_OPEN_STANDBY

6. 在主库归档日志

alter system archive log current;

7. 确认备库已经归档了最新的日志

select al.thrd "Thread", almax "Last Seq Received", lhmax "Last Seq Applied"from (select thread# thrd, max(sequence#) almaxfrom v$archived_logwhere resetlogs_change#=(select resetlogs_change# from v$database)group by thread#) al,(select thread# thrd, max(sequence#) lhmaxfrom v$log_historywhere resetlogs_change#=(select resetlogs_change# from v$database)group by thread#) lhwhere al.thrd = lh.thrd;Thread Last Seq Received Last Seq Applied
---------- ----------------- ----------------1          80           79

8. 延迟指向被激活的备库的日志归档目的地

show parameter log_archive_dest_state_2;NAME                     　　　　　　　 TYPE                              VALUE
------------------------------------ --------------------------------- ------------------------------
log_archive_dest_state_2         　　 string                             ENABLEalter system set log_archive_dest_state_2='DEFER';show parameter log_archive_dest_state_2;NAME                                  TYPE                              VALUE
------------------------------------ --------------------------------- ------------------------------
log_archive_dest_state_2              string                            DEFER

9. 激活备库

alter database activate standby database;
alter database open;
select open_mode,database_role from v$database;OPEN_MODE                             　　　　　　　　　　　　　　DATABASE_ROLE
------------------------------------------------------------ ------------------------------------------------
READ WRITE                             　　　　　　　　　　　　　 PRIMARY

10. 向备库写入测试数据

begin
for i in 1..10000 loop
insert into test10 values (i,'shall');
end loop;
commit;
end;/PL/SQL procedure successfully completed.select count(*) from test10;COUNT(*)
----------10000

11. 将备库闪回至还原点

shutdown immediate;
startup mount;
flashback database to restore point before_open_standby;
alter database convert to physical standby;
shutdown immediate;
startup mount;
alter database recover managed standby database using current logfile disconnect from session;

12. 重新启用到备库的日志归档目的地

alter system set log_archive_dest_state_2='ENABLE';
show parameter log_archive_dest_state_2;NAME                     　　　　　　　　TYPE                   　　　　　　VALUE
------------------------------------ --------------------------------- ------------------------------
log_archive_dest_state_2         　　　string                   　　　　  ENABLE

13. 测试数据同步是否正常

on primary

alter system archive log current;
alter system archive log current;select ads.dest_id,max(sequence#) "Current Sequence",max(log_sequence) "Last Archived"from v$archived_log al, v$archive_dest ad, v$archive_dest_status adswhere ad.dest_id=al.dest_idand al.dest_id=ads.dest_idand al.resetlogs_change#=(select max(resetlogs_change#) from v$archived_log )group by ads.dest_id;DEST_ID Current Sequence Last Archived
---------- ---------------- -------------1         83           832         83           84

on standby

select al.thrd "Thread", almax "Last Seq Received", lhmax "Last Seq Applied"from (select thread# thrd, max(sequence#) almaxfrom v$archived_logwhere resetlogs_change#=(select resetlogs_change# from v$database)group by thread#) al,(select thread# thrd, max(sequence#) lhmaxfrom v$log_historywhere resetlogs_change#=(select resetlogs_change# from v$database)group by thread#) lhwhere al.thrd = lh.thrd;Thread Last Seq Received Last Seq Applied
---------- ----------------- ----------------1          83           83

14. 清理闪回点

select name from v$restore_point;NAME
--------------------------------------------------
BEFORE_OPEN_STANDBYdrop restore point BEFORE_OPEN_STANDBY;

转载于:https://www.cnblogs.com/ilifeilong/p/7124145.html

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Oracle 11.2.0.4.0 Dataguard部署和日常维护(7) - Dataguard Flashback篇

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