oracle 11g rac開啟歸檔日志和閃回

1.查看數(shù)據(jù)庫(kù)是否開啟歸檔(查看兩個(gè)節(jié)點(diǎn)rac1和rac2是否開歸檔日志)

SQL> archiveloglist

SP2-0734: unknown command beginning "archivelog..." - rest of line ignored.

SQL> archive log list

Database log mode              No Archive Mode

Automatic archival             Disabled

Archive destination            USE_DB_RECOVERY_FILE_DEST

Oldest online log sequence     7

Current log sequence           8

SQL> 

2.在節(jié)點(diǎn)1(rac1)中設(shè)置只修改節(jié)點(diǎn)1的參數(shù),不影響節(jié)點(diǎn)2.

SQL> alter system set cluster_database=false scope=spfile sid='racdb1';

System altered.

SQL> 

3.在節(jié)點(diǎn)1(rac1)用srvctl命令關(guān)閉數(shù)據(jù)庫(kù)

[oracle@rac1 ~]$ srvctl stop database -d racdb

4.掛載數(shù)據(jù)庫(kù),日志修改為歸檔

SQL> startup mount

SQL> alter database archivelog;

SQL> alter system set cluster_database=true scope=spfile sid='racdb1';

SQL> shutdown immediate

5.啟動(dòng)數(shù)據(jù)庫(kù)

[oracle@rac1 ~]$ srvctl start database -d racdb

6.檢查修改后的歸檔信息

SQL> archive log list

Database log mode              Archive Mode

Automatic archival             Enabled

Archive destination            USE_DB_RECOVERY_FILE_DEST

Oldest online log sequence     9

Next log sequence to archive   10

Current log sequence           10

SQL>

7.查看數(shù)據(jù)庫(kù)是否啟用閃回功能

節(jié)點(diǎn)1(rac1):

SQL> select flashback_on from v$database;   --必須先開啟歸檔

FLASHBACK_ON

------------------

NO

SQL>

8.設(shè)置閃回的路徑和大小

SQL> alter system set cluster_database=false scope=spfile sid='racdb1';

SQL> alter system set db_recovery_file_dest='+FALSE' scope=spfile;

SQL> alter system set db_recovery_file_dest_size=5G scope=spfile;

9.關(guān)閉數(shù)據(jù)庫(kù)

[oracle@rac1 ~]$ srvctl stop database -d racdb

10.啟用閃回

SQL> startup mount

SQL> alter database flashback on;

SQL> alter system set cluster_database=true scope=spfile sid='racdb1';

SQL> shutdown immediate

11.啟動(dòng)數(shù)據(jù)庫(kù)

[oracle@rac1 ~]$ srvctl start database -d racdb

12.查看閃回功能

SQL> select flashback_on from v$database;

FLASHBACK_ON

------------------

YES

SQL>

13.也可啟用表空間閃回

SQL> alter tablespace abc flashback on;    --開啟表空間閃回

SQL> alter tablespace abc flashback off;    --關(guān)閉表空間閃回