fail recovery nec 數據庫檢查 tor file hive -m session

檢查alert日誌發現報錯如下

Wed Mar 27 15:40:30 2019
Managed Standby Recovery not using Real Time Apply
Parallel Media Recovery started with 3 slaves
Waiting for all non-current ORLs to be archived...
All non-current ORLs have been archived.
Media Recovery Waiting for thread 1 sequence 29
Fetching gap sequence in thread 1, gap sequence 29-29

Completed: alter database recover managed standby database disconnect from session
Wed Mar 27 15:42:23 2019
FAL[client]: Failed to request gap sequence
GAP - thread 1 sequence 29-29
DBID 3256623239 branch 1001954378
FAL[client]: All defined FAL servers have been attempted.

確認下29號歸檔是否丟失

SQL> select SEQUENCE#,DEST_ID,ARCHIVED,APPLIED,DELETED,STATUS,FIRST_TIME from v$archived_log order by SEQUENCE#;

SEQUENCE# DEST_ID ARC APPLIED DEL S FIRST_TIM
---------- ---------- --- --------- --- - ---------
25 2 YES YES NO A 27-MAR-19
26 2 YES YES NO A 27-MAR-19
27 1 YES YES NO A 27-MAR-19
28 1 YES YES NO A 27-MAR-19
30 2 YES NO NO A 27-MAR-19
31 1 YES NO NO A 27-MAR-19

32 1 YES NO NO A 27-MAR-19
33 1 YES NO NO A 27-MAR-19

SQL> select * from v$archive_gap;

THREAD# LOW_SEQUENCE# HIGH_SEQUENCE#
---------- ------------- --------------
1 28 29

從primary做增量恢復，28號歸檔日誌已應用，查找29號歸檔日誌起始SCN

SQL> select a.FIRST_CHANGE# from v$archived_log a where a.SEQUENCE#=29;

FIRST_CHANGE#
-------------
1450602

做增量備份

BACKUP INCREMENTAL FROM SCN 1450602 database format=‘/ogg/bk/qdtais1%U‘;

從primary傳到standby

scp qdtais* ht02:/ogg/bk

註冊備份片

catalog start with ‘/ogg/bk‘;

取消日誌應用關閉數據庫

alter database recover managed standby database cancel;

恢復增量備份

RMAN> startup force nomount;

RMAN> RESTORE STANDBY CONTROLFILE FROM ‘/ogg/bk/qdtais122ttgdpd_1_1‘;

RMAN> ALTER DATABASE MOUNT;

RMAN> RECOVER DATABASE NOREDO;

啟動實時應用

alter database recover managed standby database using current logfile disconnect from session;

取消應用打開數據庫檢查數據在啟動實時應用

SQL> alter database recover managed standby database cancel;

Database altered.

SQL> alter database open;

Database altered.

SQL> alter database recover managed standby database using current logfile disconnect from session;

Database altered.

SQL> select count(1) from ydks.httest;

COUNT(1)
----------
4995

SQL> select count(1) from ydks.httest1;

COUNT(1)
----------
997

dataguard丟失歸檔日誌處理