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DG主备日志缺失，数据无法同步修复

原创 Oracle 作者：Yichen16 时间：2022-07-31 15:40:29 0 删除 编辑

1、数据库版本：

Oracle Database 19c Enterprise Edition Release 19.0.0.0.0 - Production

Version 19.3.0.0.0

2、检查主备库同步状态

主库：

SYS@orcl>archive log list;

Database log mode              Archive Mode

Automatic archival             Enabled

Archive destination            USE_DB_RECOVERY_FILE_DEST

Oldest online log sequence     7

Next log sequence to archive   8

Current log sequence           8

备库：

SYS@orcl>select process,sequence#,status from v$managed_standby;

PROCESS    SEQUENCE# STATUS

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

ARCH               0 CONNECTED

DGRD               0 ALLOCATED

DGRD               0 ALLOCATED

ARCH               0 CONNECTED

ARCH               0 CONNECTED

ARCH               0 CONNECTED

RFS                0 IDLE

RFS                8 IDLE

RFS                0 IDLE

MRP0               8 APPLYING_LOG

10 rows selected.

3、主库 scott/oracle@pdb1 增加 it表记录

SCOTT@pdb1>select count(*) from it;

  COUNT(*)

----------

        16

SCOTT@pdb1>commit;

Commit complete

备库显示已经同步：

SCOTT@pdb1>select count(*) from it;

  COUNT(*)

----------

        12

4、删除主库所有在线 redo日志，重启库：

[oracle@db1 ORCL]$ rm -rf redo0*

[oracle@db1 ORCL]$ ll

total 3015912

-rw-r----- 1 oracle oinstall  20103168 Jul 31 10:10 control01.ctl

-rw-r----- 1 oracle oinstall 104865792 Jul 31 09:33 data01.dbf

drwxr-xr-x 2 oracle oinstall       103 Jul 31 09:30 pdb1

drwxr-xr-x 2 oracle oinstall         6 Jul 31 09:20 pdb2

drwxr-xr-x 2 oracle oinstall         6 Jul 31 09:20 pdb3

drwxr-xr-x 2 oracle oinstall         6 Jul 31 09:20 pdb4

drwxr-x--- 2 oracle oinstall       111 Jul 31 09:30 pdbseed

-rw-r----- 1 oracle oinstall 209715712 Jul 31 09:33 standby01.log

-rw-r----- 1 oracle oinstall 209715712 Jul 31 09:33 standby02.log

-rw-r----- 1 oracle oinstall 209715712 Jul 31 09:33 standby03.log

-rw-r----- 1 oracle oinstall 209715712 Jul 31 09:33 standby04.log

-rw-r----- 1 oracle oinstall 796925952 Jul 31 10:08 sysaux01.dbf

-rw-r----- 1 oracle oinstall 964698112 Jul 31 10:08 system01.dbf

-rw-r----- 1 oracle oinstall 104865792 Jul 31 09:33 temp.dbf

-rw-r----- 1 oracle oinstall 356524032 Jul 31 10:05 undotbs01.dbf

-rw-r----- 1 oracle oinstall   5251072 Jul 31 09:33 users01.dbf

主库 alert.log报错：

2022-07-31T10:15:47.167108+08:00

ARC1 (PID:24715): Master archival failure: error=313

2022-07-31T10:15:47.168645+08:00

Errors in file /u01/app/oracle/diag/rdbms/orcl/orcl/trace/orcl_arc2_24717.trc:

ORA-00313: open failed for members of log group 2 of thread 1

ORA-00312: online log 2 thread 1: '/oradata/ORCL/redo02.log'

4、清空在线 redo日志

主库：

RMAN> list failure;

using target database control file instead of recovery catalog

Database Role: PRIMARY

List of Database Failures

=========================

Failure ID Priority Status    Time Detected Summary

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

8303       CRITICAL OPEN      31-JUL-22     Online log group 3 is unavailable

8297       CRITICAL OPEN      31-JUL-22     Online log group 2 is unavailable

8291       CRITICAL OPEN      31-JUL-22     Online log group 1 is unavailable

8306       HIGH     OPEN      31-JUL-22     Online log member /oradata/ORCL/redo03.log is missing

8300       HIGH     OPEN      31-JUL-22     Online log member /oradata/ORCL/redo02.log is missing

8294       HIGH     OPEN      31-JUL-22     Online log member /oradata/ORCL/redo01.log is missing

清空 redo日志：

SYS@orcl>set linesize 200;

SYS@orcl>select * from v$log;

    GROUP#    THREAD#  SEQUENCE#      BYTES  BLOCKSIZE    MEMBERS ARC STATUS           FIRST_CHANGE# FIRST_TIM NEXT_CHANGE# NEXT_TIME     CON_ID

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

         1          1         15  209715200        512          1 YES INACTIVE               4349770 31-JUL-22      4352046 31-JUL-22          0

         3          1         16  209715200        512          1 YES INACTIVE               4352046 31-JUL-22      4352054 31-JUL-22          0

         2          1         17  209715200        512          1 NO  CURRENT                4352054 31-JUL-22   1.8447E+19                    0

SYS@orcl>alter database clear logfile group 1;

Database altered.

SYS@orcl>alter database clear logfile group 2;

alter database clear logfile group 2

ERROR at line 1:

ORA-00350: log 2 of instance orcl (thread 1) needs to be archived

ORA-00312: online log 2 thread 1: '/oradata/ORCL/redo02.log'

SYS@orcl>alter database clear logfile group 3;

Database altered.

尝试使用 clear unarchived logfile方式清空；

SYS@orcl>alter database clear unarchived logfile group 2;

Database altered.

启动主库：

SYS@orcl>alter database open;

Database altered.

SYS@orcl>alter pluggable database all  open;

Pluggable database altered.

SYS@orcl>show pdbs;

    CON_ID CON_NAME                       OPEN MODE  RESTRICTED

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

         2 PDB$SEED                       READ ONLY  NO

         3 PDB1                           READ WRITE NO

SYS@orcl>archive log list;

Database log mode              Archive Mode

Automatic archival             Enabled

Archive destination            USE_DB_RECOVERY_FILE_DEST

Oldest online log sequence     18

Next log sequence to archive   19

Current log sequence           19

SCOTT@pdb1>select * from it;

        ID

----------

         1

         2

       100

         1

         2

       100

         1

         2

       100

         1

         2

        ID

----------

       100

       999

       222

       888

      1111

16 rows selected.

5、检查备库数据同步状态

SYS@orcl>select process,sequence#,status from v$managed_standby;

PROCESS    SEQUENCE# STATUS

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

ARCH               0 CONNECTED

DGRD               0 ALLOCATED

DGRD               0 ALLOCATED

ARCH              18 CLOSING

ARCH               0 CONNECTED

ARCH               0 CONNECTED

RFS                0 IDLE

RFS               19 IDLE

RFS                0 IDLE

MRP0              17 APPLYING_LOG

10 rows selected.

SYS@orcl>archive log list;

Database log mode              Archive Mode

Automatic archival             Enabled

Archive destination            USE_DB_RECOVERY_FILE_DEST

Oldest online log sequence     15

Next log sequence to archive   0

Current log sequence           17

SCOTT@pdb1>select * from it;

        ID

         1

         2

       100

         1

         2

       100

         1

         2

       100

         1

         2

        ID

----------

       100

       999

       222

       888

15 rows selected.

从现象来看，主库数据没有同步过来！！！ 主库日志日志断档 -缺少 17号日志，造成数据无法同步；

[oracle@db1 2022_07_31]$ ll -lrth

-rw-r----- 1 oracle oinstall 153K Jul 31 06:50 o1_mf_1_21_kgcfgfxs_.arc

-rw-r----- 1 oracle oinstall 1.0K Jul 31 06:50 o1_mf_1_22_kgcfgfz0_.arc

-rw-r----- 1 oracle oinstall 4.4M Jul 31 08:29 o1_mf_1_23_kgcm728w_.arc

-rw-r----- 1 oracle oinstall 1.0K Jul 31 08:29 o1_mf_1_1_kgcm72fl_.arc

-rw-r----- 1 oracle oinstall  11M Jul 31 09:09 o1_mf_1_2_kgcokkpm_.arc

-rw-r----- 1 oracle oinstall 1.5K Jul 31 09:09 o1_mf_1_3_kgcokl7z_.arc

-rw-r----- 1 oracle oinstall 2.0M Jul 31 09:26 o1_mf_1_4_kgcpkwqk_.arc

-rw-r----- 1 oracle oinstall 1.0K Jul 31 09:26 o1_mf_1_5_kgcpkws2_.arc

-rw-r----- 1 oracle oinstall 241K Jul 31 09:32 o1_mf_1_6_kgcpy08y_.arc

-rw-r----- 1 oracle oinstall 1.0K Jul 31 09:33 o1_mf_1_7_kgcpz1ot_.arc

-rw-r----- 1 oracle oinstall  19K Jul 31 10:17 o1_mf_1_9_kgcsl61c_.arc

-rw-r----- 1 oracle oinstall  31K Jul 31 10:21 o1_mf_1_10_kgcsrqq2_.arc

-rw-r----- 1 oracle oinstall 1.9M Jul 31 10:21 o1_mf_1_11_kgcssn3l_.arc

-rw-r----- 1 oracle oinstall 249K Jul 31 10:30 o1_mf_1_12_kgct980r_.arc

-rw-r----- 1 oracle oinstall 179K Jul 31 10:34 o1_mf_1_13_kgctlkfr_.arc

-rw-r----- 1 oracle oinstall  12K Jul 31 10:35 o1_mf_1_14_kgctm6hq_.arc

-rw-r----- 1 oracle oinstall 730K Jul 31 10:45 o1_mf_1_15_kgcv6x9d_.arc

-rw-r----- 1 oracle oinstall 1.0K Jul 31 10:45 o1_mf_1_16_kgcv6xbo_.arc

-rw-r----- 1 oracle oinstall 1.0K Jul 31 11:31 o1_mf_1_18_kgcxx9lr_.arc

[oracle@db2 2022_07_31]$ ls -lrth

total 5.3M

-rw-r----- 1 oracle oinstall 1.5K Jul 31 09:09 o1_mf_1_3_kgcokl49_.arc

-rw-r----- 1 oracle oinstall 2.0M Jul 31 09:26 o1_mf_1_4_kgcpkwlv_.arc

-rw-r----- 1 oracle oinstall 1.0K Jul 31 09:26 o1_mf_1_5_kgcpkwo9_.arc

-rw-r----- 1 oracle oinstall 241K Jul 31 09:34 o1_mf_1_6_kgcq18bj_.arc

-rw-r----- 1 oracle oinstall 1.0K Jul 31 09:34 o1_mf_1_7_kgcq1bwz_.arc

-rw-r----- 1 oracle oinstall  19K Jul 31 10:17 o1_mf_1_9_kgcsl883_.arc

-rw-r----- 1 oracle oinstall  31K Jul 31 10:21 o1_mf_1_10_kgcsrt2x_.arc

-rw-r----- 1 oracle oinstall 1.9M Jul 31 10:21 o1_mf_1_11_kgcssn72_.arc

-rw-r----- 1 oracle oinstall 249K Jul 31 10:30 o1_mf_1_12_kgct983p_.arc

-rw-r----- 1 oracle oinstall 179K Jul 31 10:34 o1_mf_1_13_kgctlkjw_.arc

-rw-r----- 1 oracle oinstall  12K Jul 31 10:35 o1_mf_1_14_kgctm6ml_.arc

-rw-r----- 1 oracle oinstall 1.0K Jul 31 10:45 o1_mf_1_16_kgcv6xco_.arc

-rw-r----- 1 oracle oinstall 730K Jul 31 10:45 o1_mf_1_15_kgcv6xdh_.arc

-rw-r----- 1 oracle oinstall 1.0K Jul 31 11:31 o1_mf_1_18_kgcxxcx9_.arc

7、恢复备库日志断档，使主备数据同步！

方法有多种：

第一种：使用 duplicate 复制在线库；

第二种：采用主库创建备库控制文件，使用全备份主库，二者一起恢复备库；（数据量大）

第三种：采用主库创建备库控制文件，使用增量备份主库，二者一起恢复备库。（数据量较少）

下面第三种方式（主备同步）：

开始增量备份主库：

run{

allocate channel c1 type disk;

allocate channel c2 type disk;

allocate channel c3 type disk;

allocate channel c4 type disk;

backup as compressed backupset incremental level 1 cumulative database format '/home/oracle/backup3/full_db_level1_%U_%T.bak';

sql 'alter system archive log current';

backup archivelog all not backed up 1 times format '/home/oracle/backup3/arh_level1_%U_%T.bak';

backup current controlfile format '/home/oracle/backup3/ctl_level1_%U_%T.bak';

backup spfile format '/home/oracle/backup3/spfile_level1_%U_%T.bak';

release channel c1;

release channel c2;

release channel c3;

release channel c4;

}

为备库备份控制文件：

[oracle@db1 ~]$ sqlplus / as sysdba

SQL*Plus: Release 19.0.0.0.0 - Production on Sun Jul 31 15:04:27 2022

Version 19.3.0.0.0

Copyright (c) 1982, 2019, Oracle.  All rights reserved.

Connected to:

Oracle Database 19c Enterprise Edition Release 19.0.0.0.0 - Production

Version 19.3.0.0.0

SYS@orcl>alter database create standby controlfile as '/home/oracle/standby01.ctl';

Database altered.

增量备份 +控制文件一起复制到备库：

[oracle@db1 ~]$ scp -r backup3  oracle@db2:/home/oracle

启动备库到 nomount状态：

SYS@orcl>startup nomount;

ORACLE instance started.

Total System Global Area 2466250400 bytes

Fixed Size                  9137824 bytes

Variable Size             553648128 bytes

Database Buffers         1895825408 bytes

Redo Buffers                7639040 bytes

恢复控制文件：

RMAN> restore controlfile from '/home/oracle/backup3/standby01.ctl';

Starting restore at 31-JUL-22

using target database control file instead of recovery catalog

allocated channel: ORA_DISK_1

channel ORA_DISK_1: SID=379 device type=DISK

channel ORA_DISK_1: copied control file copy

output file name=/oradata/ORCLDG/control01.ctl

output file name=/flash_recovery_area/ORCLDG/control02.ctl

Finished restore at 31-JUL-22

RMAN> alter database mount;

released channel: ORA_DISK_1

Statement processed

注册恢复目录：

RMAN> catalog start with '/home/oracle/backup3/';

恢复备库：

RMAN> recover database;

Starting recover at 31-JUL-22

using channel ORA_DISK_1

RMAN-00571: =======================================

RMAN-00569: ERROR MESSAGE STACK FOLLOWS ===============

RMAN-00571: ===========================================================

RMAN-03002: failure of recover command at 07/31/2022 15:10:40

RMAN-06094: datafile 86 must be restored

RMAN> restore datafile 86;

Starting restore at 31-JUL-22

using channel ORA_DISK_1

channel ORA_DISK_1: starting datafile backup set restore

channel ORA_DISK_1: specifying datafile(s) to restore from backup set

channel ORA_DISK_1: restoring datafile 00086 to /oradata/ORCL/data111.dbf

channel ORA_DISK_1: reading from backup piece /home/oracle/backup3/full_db_level1_h4140ct6_1_1_20220731.bak

channel ORA_DISK_1: piece handle=/home/oracle/backup3/full_db_level1_h4140ct6_1_1_20220731.bak tag=TAG20220731T150302

channel ORA_DISK_1: restored backup piece 1

channel ORA_DISK_1: restore complete, elapsed time: 00:00:01

Finished restore at 31-JUL-22

RMAN> recover database;

Starting recover at 31-JUL-22

using channel ORA_DISK_1

channel ORA_DISK_1: starting incremental datafile backup set restore

channel ORA_DISK_1: specifying datafile(s) to restore from backup set

destination for restore of datafile 00004: /oradata/ORCL/undotbs01.dbf

destination for restore of datafile 00085: /oradata/ORCL/data01.dbf

channel ORA_DISK_1: reading from backup piece /home/oracle/backup3/full_db_level1_h5140ct6_1_1_20220731.bak

channel ORA_DISK_1: piece handle=/home/oracle/backup3/full_db_level1_h5140ct6_1_1_20220731.bak tag=TAG20220731T150302

channel ORA_DISK_1: restored backup piece 1

channel ORA_DISK_1: restore complete, elapsed time: 00:00:03

channel ORA_DISK_1: starting incremental datafile backup set restore

channel ORA_DISK_1: specifying datafile(s) to restore from backup set

destination for restore of datafile 00075: /oradata/ORCL/pdb1/sysaux01.dbf

channel ORA_DISK_1: reading from backup piece /home/oracle/backup3/full_db_level1_h6140ct6_1_1_20220731.bak

channel ORA_DISK_1: piece handle=/home/oracle/backup3/full_db_level1_h6140ct6_1_1_20220731.bak tag=TAG20220731T150302

channel ORA_DISK_1: restored backup piece 1

channel ORA_DISK_1: restore complete, elapsed time: 00:00:01

channel ORA_DISK_1: starting incremental datafile backup set restore

channel ORA_DISK_1: specifying datafile(s) to restore from backup set

destination for restore of datafile 00001: /oradata/ORCL/system01.dbf

destination for restore of datafile 00007: /oradata/ORCL/users01.dbf

channel ORA_DISK_1: reading from backup piece /home/oracle/backup3/full_db_level1_h3140ct6_1_1_20220731.bak

channel ORA_DISK_1: piece handle=/home/oracle/backup3/full_db_level1_h3140ct6_1_1_20220731.bak tag=TAG20220731T150302

channel ORA_DISK_1: restored backup piece 1

channel ORA_DISK_1: restore complete, elapsed time: 00:00:01

channel ORA_DISK_1: starting incremental datafile backup set restore

channel ORA_DISK_1: specifying datafile(s) to restore from backup set

destination for restore of datafile 00003: /oradata/ORCL/sysaux01.dbf

channel ORA_DISK_1: reading from backup piece /home/oracle/backup3/full_db_level1_h4140ct6_1_1_20220731.bak

channel ORA_DISK_1: piece handle=/home/oracle/backup3/full_db_level1_h4140ct6_1_1_20220731.bak tag=TAG20220731T150302

channel ORA_DISK_1: restored backup piece 1

channel ORA_DISK_1: restore complete, elapsed time: 00:00:01

channel ORA_DISK_1: starting incremental datafile backup set restore

channel ORA_DISK_1: specifying datafile(s) to restore from backup set

destination for restore of datafile 00074: /oradata/ORCL/pdb1/system01.dbf

channel ORA_DISK_1: reading from backup piece /home/oracle/backup3/full_db_level1_h8140ctb_1_1_20220731.bak

channel ORA_DISK_1: piece handle=/home/oracle/backup3/full_db_level1_h8140ctb_1_1_20220731.bak tag=TAG20220731T150302

channel ORA_DISK_1: restored backup piece 1

channel ORA_DISK_1: restore complete, elapsed time: 00:00:01

channel ORA_DISK_1: starting incremental datafile backup set restore

channel ORA_DISK_1: specifying datafile(s) to restore from backup set

destination for restore of datafile 00076: /oradata/ORCL/pdb1/undotbs01.dbf

channel ORA_DISK_1: reading from backup piece /home/oracle/backup3/full_db_level1_hb140cte_1_1_20220731.bak

channel ORA_DISK_1: piece handle=/home/oracle/backup3/full_db_level1_hb140cte_1_1_20220731.bak tag=TAG20220731T150302

channel ORA_DISK_1: restored backup piece 1

channel ORA_DISK_1: restore complete, elapsed time: 00:00:01

channel ORA_DISK_1: starting incremental datafile backup set restore

channel ORA_DISK_1: specifying datafile(s) to restore from backup set

destination for restore of datafile 00081: /oradata/ORCL/pdb1/data11.dbf

channel ORA_DISK_1: reading from backup piece /home/oracle/backup3/full_db_level1_hc140ctf_1_1_20220731.bak

channel ORA_DISK_1: piece handle=/home/oracle/backup3/full_db_level1_hc140ctf_1_1_20220731.bak tag=TAG20220731T150302

channel ORA_DISK_1: restored backup piece 1

channel ORA_DISK_1: restore complete, elapsed time: 00:00:01

starting media recovery

archived log for thread 1 with sequence 19 is already on disk as file /flash_recovery_area/ORCLDG/archivelog/2022_07_31/o1_mf_1_19_kgdb9m0n_.arc

archived log for thread 1 with sequence 20 is already on disk as file /flash_recovery_area/ORCLDG/archivelog/2022_07_31/o1_mf_1_20_kgdb9mbm_.arc

archived log file name=/flash_recovery_area/ORCLDG/archivelog/2022_07_31/o1_mf_1_19_kgdb9m0n_.arc thread=1 sequence=19

archived log file name=/flash_recovery_area/ORCLDG/archivelog/2022_07_31/o1_mf_1_20_kgdb9mbm_.arc thread=1 sequence=20

media recovery complete, elapsed time: 00:00:00

Finished recover at 31-JUL-22

启动备库：

RMAN> alter database open;

Statement processed

备库同步主库数据：

[oracle@db2 ~]$ sqlplus / as sysdba

SQL*Plus: Release 19.0.0.0.0 - Production on Sun Jul 31 15:13:14 2022

Version 19.3.0.0.0

Copyright (c) 1982, 2019, Oracle.  All rights reserved.

Connected to:

Oracle Database 19c Enterprise Edition Release 19.0.0.0.0 - Production

Version 19.3.0.0.0

SYS@orcl>@1

Database altered.

检查备库日志：（日志序列 21已经同步到备库了，主库下一个日志序列是 21）

2022-07-31T15:13:20.717299+08:00

TT02 (PID:48672): Waiting for all non-current ORLs to be archived

2022-07-31T15:13:20.717411+08:00

TT02 (PID:48672): All non-current ORLs have been archived

2022-07-31T15:13:20.867609+08:00

PR00 (PID:48662): Media Recovery Waiting for T-1.S-21 (in transit)

2022-07-31T15:13:20.868152+08:00

Recovery of Online Redo Log: Thread 1 Group 4 Seq 21 Reading mem 0

  Mem# 0: /oradata/ORCL/standby01.log

2022-07-31T15:13:21.492542+08:00

Completed: alter database recover managed standby database using current logfile  disconnect from session

主库：

[oracle@db1 ~]$ sqlplus / as sysdba

SQL*Plus: Release 19.0.0.0.0 - Production on Sun Jul 31 15:14:49 2022

Version 19.3.0.0.0

Copyright (c) 1982, 2019, Oracle.  All rights reserved.

Connected to:

Oracle Database 19c Enterprise Edition Release 19.0.0.0.0 - Production

Version 19.3.0.0.0

SYS@orcl>archive log list;

Database log mode              Archive Mode

Automatic archival             Enabled

Archive destination            USE_DB_RECOVERY_FILE_DEST

Oldest online log sequence     19

Next log sequence to archive   21

Current log sequence           21

开启 pdb1库；

[oracle@db2 ~]$ sqlplus / as sysdba

SQL*Plus: Release 19.0.0.0.0 - Production on Sun Jul 31 15:13:14 2022

Version 19.3.0.0.0

Copyright (c) 1982, 2019, Oracle.  All rights reserved.

Connected to:

Oracle Database 19c Enterprise Edition Release 19.0.0.0.0 - Production

Version 19.3.0.0.0

SYS@orcl>@1

Database altered.

（ ALTER DATABASE RECOVER MANAGED STANDBY DATABASE DISCONNECT;）

SYS@orcl>show pdbs;

    CON_ID CON_NAME                       OPEN MODE  RESTRICTED

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

         2 PDB$SEED                       READ ONLY  NO

         3 PDB1                           MOUNTED

SYS@orcl>alter pluggable database pdb1 open;

Pluggable database altered.

SYS@orcl>show pdbs;

    CON_ID CON_NAME                       OPEN MODE  RESTRICTED

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

         2 PDB$SEED                       READ ONLY  NO

         3 PDB1                           READ ONLY  NO

检查主备库数据一致性：

主库：

SCOTT@pdb1>select count(*) from it;

  COUNT(*)

----------

        16

备库：

SCOTT@pdb1>select count(*) from it;

  COUNT(*)

----------

        16

 

总结：主备数据不同步可能有多种原因，一般过程如下： 1、数据同步语句是否开启 2、主备应用日志是否相同，是否存在日志缺失 3、备库 alter文件是否报错，具体问题再来解决。


Yicheng16
22.07.31

-- The End --  

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