文档课题：验证oracle 19c单条命令恢复ADG GAP.
数据库：oracle 19.13
主库：IP 192.168.133.101 实例名 tmis 主机名 leo-oracle-19c
备库：IP 192.168.133.38 实例名 tmisdg 主机名 leo-19c-tmisdg
1、主备实时同步确认
--主库insert数据
sys@TMIS> create table test (id number);
Table created.
sys@TMIS> insert into test values(1);
1 row created.
sys@TMIS> commit;
Commit complete.
--备库验证
SQL> select process,status from v$managed_standby;
PROCESS STATUS
--------- ------------
ARCH CONNECTED
DGRD ALLOCATED
DGRD ALLOCATED
ARCH CONNECTED
ARCH CONNECTED
ARCH CONNECTED
RFS IDLE
RFS IDLE
RFS IDLE
MRP0 APPLYING_LOG
10 rows selected.
SQL> select * from test;
ID
----------
1
说明：如上所示，主备实时同步正常.
2、模拟异常GAP
2.1、备库停库
SQL> ! ip a | grep 133.38
inet 192.168.133.38/24 brd 192.168.133.255 scope global noprefixroute ens33
SQL> alter database recover managed standby database cancel;
Database altered.
SQL> shutdown immediate
Database closed.
Database dismounted.
ORACLE instance shut down.
2.2、主库归档文件确认
[oracle@leo-oracle-19c archivelog]$ pwd
/u01/app/oracle/archivelog
[oracle@leo-oracle-19c archivelog]$ ls -ltrh
total 407M
-rw-r----- 1 oracle oinstall 35M Aug 8 20:36 1_12_1174603581.dbf
-rw-r----- 1 oracle oinstall 19M Aug 8 20:36 1_13_1174603581.dbf
-rw-r----- 1 oracle oinstall 69M Aug 9 15:31 1_14_1174603581.dbf
-rw-r----- 1 oracle oinstall 61M Aug 11 08:59 1_15_1174603581.dbf
-rw-r----- 1 oracle oinstall 183M Aug 11 09:01 1_16_1174603581.dbf
-rw-r----- 1 oracle oinstall 11M Aug 11 09:10 1_17_1174603581.dbf
-rw-r----- 1 oracle oinstall 11K Aug 11 09:10 1_18_1174603581.dbf
-rw-r----- 1 oracle oinstall 32M Aug 11 10:22 1_19_1174603581.dbf
-rw-r----- 1 oracle oinstall 900K Aug 11 10:45 1_20_1174603581.dbf
-rw-r----- 1 oracle oinstall 280K Aug 11 10:51 1_21_1174603581.dbf
sys@TMIS> select THREAD#,SEQUENCE#,name,round(BLOCKS*BLOCK_SIZE/1024/1024,0) as "size_M" from v$archived_log;
THREAD# SEQUENCE# NAME size_M
---------- ---------- -------------------------------------------------- ----------
1 12 /u01/app/oracle/archivelog/1_12_1174603581.dbf 35
1 13 /u01/app/oracle/archivelog/1_13_1174603581.dbf 18
1 14 /u01/app/oracle/archivelog/1_14_1174603581.dbf 68
1 15 /u01/app/oracle/archivelog/1_15_1174603581.dbf 60
1 16 /u01/app/oracle/archivelog/1_16_1174603581.dbf 183
1 17 /u01/app/oracle/archivelog/1_17_1174603581.dbf 11
1 18 /u01/app/oracle/archivelog/1_18_1174603581.dbf 0
1 19 /u01/app/oracle/archivelog/1_19_1174603581.dbf 31
1 19 tmisdg 31
1 20 /u01/app/oracle/archivelog/1_20_1174603581.dbf 1
1 20 tmisdg 1
1 21 /u01/app/oracle/archivelog/1_21_1174603581.dbf 0
1 21 tmisdg 0
1 22 /u01/app/oracle/archivelog/1_22_1174603581.dbf 0
1 22 tmisdg 0
15 rows selected.
2.3、主库建测试数据
create table books
(
bk_id number(38) not null primary key,
bk_title varchar2(50) not null,
copyright date not null
);
insert into books values (11078,'Learning MYSQL','2010-01-01');
insert into books values (11033,'Study Html','2011-01-01');
insert into books values (11035,'How to use php','2003-01-01');
insert into books values (11072,'Teach yourself javascript','2005-01-01');
insert into books values (11028,'Learning C++','2005-01-01');
insert into books values (11069,'MYSQL professional','2009-01-01');
insert into books values (11026,'Guide to MySQL 5.7','2008-01-01');
insert into books values (11041,'Inside VC++','2011-01-01');
commit;
sys@TMIS> select FILE#,name ,status from v$datafile;
FILE# NAME STATUS
---------- -------------------------------------------------- -------
1 /u01/app/oracle/oradata/TMIS/system01.dbf SYSTEM
3 /u01/app/oracle/oradata/TMIS/sysaux01.dbf ONLINE
4 /u01/app/oracle/oradata/TMIS/undotbs01.dbf ONLINE
7 /u01/app/oracle/oradata/TMIS/users01.dbf ONLINE
sys@TMIS> alter system switch logfile;
System altered.
sys@TMIS> select THREAD#,SEQUENCE#,name,round(BLOCKS*BLOCK_SIZE/1024/1024,0) as "size_M" from v$archived_log;
THREAD# SEQUENCE# NAME size_M
---------- ---------- -------------------------------------------------- ----------
1 12 /u01/app/oracle/archivelog/1_12_1174603581.dbf 35
1 13 /u01/app/oracle/archivelog/1_13_1174603581.dbf 18
1 14 /u01/app/oracle/archivelog/1_14_1174603581.dbf 68
1 15 /u01/app/oracle/archivelog/1_15_1174603581.dbf 60
1 16 /u01/app/oracle/archivelog/1_16_1174603581.dbf 183
1 17 /u01/app/oracle/archivelog/1_17_1174603581.dbf 11
1 18 /u01/app/oracle/archivelog/1_18_1174603581.dbf 0
1 19 /u01/app/oracle/archivelog/1_19_1174603581.dbf 31
1 19 tmisdg 31
1 20 /u01/app/oracle/archivelog/1_20_1174603581.dbf 1
1 20 tmisdg 1
1 21 /u01/app/oracle/archivelog/1_21_1174603581.dbf 0
1 21 tmisdg 0
1 22 /u01/app/oracle/archivelog/1_22_1174603581.dbf 0
1 22 tmisdg 0
1 23 /u01/app/oracle/archivelog/1_23_1174603581.dbf 5
16 rows selected.
sys@TMIS> show parameter log_archive_dest_2
NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
log_archive_dest_2 string service=tmisdg lgwr async vali
d_for=(online_logfiles,primary
_role) db_unique_name=tmisdg
2.4、主库新增数据文件
sys@TMIS> alter tablespace users add datafile '/u01/app/oracle/oradata/TMIS/users02.dbf' size 10M autoextend on;
Tablespace altered.
sys@TMIS> select FILE#,name ,status from v$datafile;
FILE# NAME STATUS
---------- -------------------------------------------------- -------
1 /u01/app/oracle/oradata/TMIS/system01.dbf SYSTEM
3 /u01/app/oracle/oradata/TMIS/sysaux01.dbf ONLINE
4 /u01/app/oracle/oradata/TMIS/undotbs01.dbf ONLINE
5 /u01/app/oracle/oradata/TMIS/users02.dbf ONLINE
7 /u01/app/oracle/oradata/TMIS/users01.dbf ONLINE
sys@TMIS> alter system switch logfile;
System altered.
sys@TMIS> select THREAD#,SEQUENCE#,name,round(BLOCKS*BLOCK_SIZE/1024/1024,0) as "size_M" from v$archived_log;
THREAD# SEQUENCE# NAME size_M
---------- ---------- -------------------------------------------------- ----------
1 12 /u01/app/oracle/archivelog/1_12_1174603581.dbf 35
1 13 /u01/app/oracle/archivelog/1_13_1174603581.dbf 18
1 14 /u01/app/oracle/archivelog/1_14_1174603581.dbf 68
1 15 /u01/app/oracle/archivelog/1_15_1174603581.dbf 60
1 16 /u01/app/oracle/archivelog/1_16_1174603581.dbf 183
1 17 /u01/app/oracle/archivelog/1_17_1174603581.dbf 11
1 18 /u01/app/oracle/archivelog/1_18_1174603581.dbf 0
1 19 /u01/app/oracle/archivelog/1_19_1174603581.dbf 31
1 19 tmisdg 31
1 20 /u01/app/oracle/archivelog/1_20_1174603581.dbf 1
1 20 tmisdg 1
1 21 /u01/app/oracle/archivelog/1_21_1174603581.dbf 0
1 21 tmisdg 0
1 22 /u01/app/oracle/archivelog/1_22_1174603581.dbf 0
1 22 tmisdg 0
1 23 /u01/app/oracle/archivelog/1_23_1174603581.dbf 5
1 24 /u01/app/oracle/archivelog/1_24_1174603581.dbf 0
17 rows selected.
[oracle@leo-oracle-19c archivelog]$ ls -ltr
total 421696
-rw-r----- 1 oracle oinstall 36225024 Aug 8 20:36 1_12_1174603581.dbf
-rw-r----- 1 oracle oinstall 19171328 Aug 8 20:36 1_13_1174603581.dbf
-rw-r----- 1 oracle oinstall 71366656 Aug 9 15:31 1_14_1174603581.dbf
-rw-r----- 1 oracle oinstall 62924288 Aug 11 08:59 1_15_1174603581.dbf
-rw-r----- 1 oracle oinstall 191488512 Aug 11 09:01 1_16_1174603581.dbf
-rw-r----- 1 oracle oinstall 11385856 Aug 11 09:10 1_17_1174603581.dbf
-rw-r----- 1 oracle oinstall 10752 Aug 11 09:10 1_18_1174603581.dbf
-rw-r----- 1 oracle oinstall 32526336 Aug 11 10:22 1_19_1174603581.dbf
-rw-r----- 1 oracle oinstall 921088 Aug 11 10:45 1_20_1174603581.dbf
-rw-r----- 1 oracle oinstall 286720 Aug 11 10:51 1_21_1174603581.dbf
-rw-r----- 1 oracle oinstall 390656 Aug 11 10:57 1_22_1174603581.dbf
-rw-r----- 1 oracle oinstall 4772352 Aug 11 11:08 1_23_1174603581.dbf
-rw-r----- 1 oracle oinstall 325120 Aug 11 11:12 1_24_1174603581.dbf
2.5、新增归档文件确认
--备库查询归档日志文件
[oracle@leo-19c-tmisdg archivelog]$ ls -ltr
total 33328
-rw-r----- 1 oracle oinstall 32526336 Aug 11 10:23 1_19_1174603581.dbf
-rw-r----- 1 oracle oinstall 921088 Aug 11 10:45 1_20_1174603581.dbf
-rw-r----- 1 oracle oinstall 286720 Aug 11 10:51 1_21_1174603581.dbf
-rw-r----- 1 oracle oinstall 390656 Aug 11 10:57 1_22_1174603581.dbf
说明：如上所示，主库新产生SEQUENCE#为23和24的归档日志文件没有传递到备库.
2.6、主库删除新增归档文件
--主库手动删除SEQUENCE#为23和24的归档日志文件
[oracle@leo-oracle-19c archivelog]$ rm -rf 1_23_1174603581.dbf
[oracle@leo-oracle-19c archivelog]$ rm -fr 1_24_1174603581.dbf
[oracle@leo-oracle-19c archivelog]$ rman target /
Recovery Manager: Release 19.0.0.0.0 - Production on Sun Aug 11 11:17:13 2024
Version 19.13.0.0.0
Copyright (c) 1982, 2019, Oracle and/or its affiliates. All rights reserved.
connected to target database: TMIS (DBID=362622715)
RMAN> crosscheck archivelog all;
using target database control file instead of recovery catalog
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=147 device type=DISK
validation succeeded for archived log
archived log file name=/u01/app/oracle/archivelog/1_12_1174603581.dbf RECID=1 STAMP=1176496608
validation succeeded for archived log
archived log file name=/u01/app/oracle/archivelog/1_13_1174603581.dbf RECID=2 STAMP=1176496609
validation succeeded for archived log
archived log file name=/u01/app/oracle/archivelog/1_14_1174603581.dbf RECID=3 STAMP=1176564675
validation succeeded for archived log
archived log file name=/u01/app/oracle/archivelog/1_15_1174603581.dbf RECID=4 STAMP=1176713982
validation succeeded for archived log
archived log file name=/u01/app/oracle/archivelog/1_16_1174603581.dbf RECID=5 STAMP=1176714100
validation succeeded for archived log
archived log file name=/u01/app/oracle/archivelog/1_17_1174603581.dbf RECID=6 STAMP=1176714626
validation succeeded for archived log
archived log file name=/u01/app/oracle/archivelog/1_18_1174603581.dbf RECID=7 STAMP=1176714645
validation succeeded for archived log
archived log file name=/u01/app/oracle/archivelog/1_19_1174603581.dbf RECID=8 STAMP=1176718944
validation succeeded for archived log
archived log file name=/u01/app/oracle/archivelog/1_20_1174603581.dbf RECID=10 STAMP=1176720312
validation succeeded for archived log
archived log file name=/u01/app/oracle/archivelog/1_21_1174603581.dbf RECID=12 STAMP=1176720683
validation succeeded for archived log
archived log file name=/u01/app/oracle/archivelog/1_22_1174603581.dbf RECID=14 STAMP=1176721039
validation failed for archived log
archived log file name=/u01/app/oracle/archivelog/1_23_1174603581.dbf RECID=16 STAMP=1176721687
validation failed for archived log
archived log file name=/u01/app/oracle/archivelog/1_24_1174603581.dbf RECID=17 STAMP=1176721962
Crosschecked 13 objects
RMAN> delete expired archivelog all;
released channel: ORA_DISK_1
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=147 device type=DISK
List of Archived Log Copies for database with db_unique_name TMIS
=====================================================================
Key Thrd Seq S Low Time
------- ---- ------- - ---------
16 1 23 X 11-AUG-24
Name: /u01/app/oracle/archivelog/1_23_1174603581.dbf
17 1 24 X 11-AUG-24
Name: /u01/app/oracle/archivelog/1_24_1174603581.dbf
Do you really want to delete the above objects (enter YES or NO)? yes
deleted archived log
archived log file name=/u01/app/oracle/archivelog/1_23_1174603581.dbf RECID=16 STAMP=1176721687
deleted archived log
archived log file name=/u01/app/oracle/archivelog/1_24_1174603581.dbf RECID=17 STAMP=1176721962
Deleted 2 EXPIRED objects
2.7、备库开启数据库后确认实时应用情况
SQL> select process,status from v$managed_standby;
PROCESS STATUS
--------- ------------
ARCH CLOSING
DGRD ALLOCATED
DGRD ALLOCATED
ARCH CONNECTED
ARCH CONNECTED
ARCH CONNECTED
RFS IDLE
RFS IDLE
MRP0 APPLYING_LOG
9 rows selected.
SQL> select name,db_unique_name,open_mode from v$database;
NAME DB_UNIQUE_NAME OPEN_MODE
-------------- ------------------------------ --------------------
TMIS tmisdg READ ONLY WITH APPLY
SQL> select SOURCE_DBID,SOURCE_DB_UNIQUE_NAME,NAME,VALUE,TIME_COMPUTED from v$dataguard_stats;
SOURCE_DBID SOURCE_DB_UNIQUE_NAME NAME VALUE TIME_COMPUTED
----------- -------------------------------- ------------------------------ --------------- ------------------------------
362622715 tmis transport lag +00 00:23:12 08/11/2024 11:26:21
362622715 tmis apply lag +00 00:23:13 08/11/2024 11:26:21
362622715 tmis apply finish time 08/11/2024 11:26:21
0 estimated startup time 11 08/11/2024 11:26:21
SQL> select * from books;
select * from books
*
ERROR at line 1:
ORA-00942: table or view does not exist
SQL> select FILE#,name ,status from v$datafile;
FILE# NAME STATUS
---------- -------------------------------------------------- -------
1 /u01/app/oracle/oradata/TMISDG/system01.dbf SYSTEM
3 /u01/app/oracle/oradata/TMISDG/sysaux01.dbf ONLINE
4 /u01/app/oracle/oradata/TMISDG/undotbs01.dbf ONLINE
7 /u01/app/oracle/oradata/TMISDG/users01.dbf ONLINE
注意：
a、此时备库存在GAP，新添加的users02.dbf文件没有在备库生成;
b、备库能成功open，且mrp进程显示正常.
c、主库新增的books表并未同步到备库;
说明：成功模拟出备库归档GAP.
3、恢复备库GAP
3.1、备库单条命令恢复GAP
注意：备库在open的情况下，直接执行recover standby命令.
[oracle@leo-19c-tmisdg ~]$ rman target /
Recovery Manager: Release 19.0.0.0.0 - Production on Sun Aug 11 11:44:24 2024
Version 19.13.0.0.0
Copyright (c) 1982, 2019, Oracle and/or its affiliates. All rights reserved.
connected to target database: TMIS (DBID=362622715)
RMAN> recover standby database from service tmis;
Starting recover at 11-AUG-24
using target database control file instead of recovery catalog
Oracle instance started
Total System Global Area 2466249664 bytes
Fixed Size 8899520 bytes
Variable Size 536870912 bytes
Database Buffers 1912602624 bytes
Redo Buffers 7876608 bytes
contents of Memory Script:
{
restore standby controlfile from service 'tmis'; --重新恢复控制文件
alter database mount standby database;
}
executing Memory Script
Starting restore at 11-AUG-24
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=261 device type=DISK
channel ORA_DISK_1: starting datafile backup set restore
channel ORA_DISK_1: using network backup set from service tmis
channel ORA_DISK_1: restoring control file
channel ORA_DISK_1: restore complete, elapsed time: 00:00:01
output file name=/u01/app/oracle/oradata/TMISDG/control01.ctl
Finished restore at 11-AUG-24
released channel: ORA_DISK_1
Statement processed
Executing: alter system set standby_file_management=manual
contents of Memory Script:
{
set newname for datafile 5 to
"/u01/app/oracle/oradata/TMISDG/users02.dbf";
restore from service 'tmis' datafile
5;
catalog datafilecopy "/u01/app/oracle/oradata/TMISDG/users02.dbf";
switch datafile all; --修改备库控制文件中数据文件路径
}
executing Memory Script
executing command: SET NEWNAME
Starting restore at 11-AUG-24
Starting implicit crosscheck backup at 11-AUG-24
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=137 device type=DISK
Crosschecked 2 objects
Finished implicit crosscheck backup at 11-AUG-24
Starting implicit crosscheck copy at 11-AUG-24
using channel ORA_DISK_1
Finished implicit crosscheck copy at 11-AUG-24
searching for all files in the recovery area
cataloging files...
no files cataloged
using channel ORA_DISK_1
channel ORA_DISK_1: starting datafile backup set restore
channel ORA_DISK_1: using network backup set from service tmis
channel ORA_DISK_1: specifying datafile(s) to restore from backup set
channel ORA_DISK_1: restoring datafile 00005 to /u01/app/oracle/oradata/TMISDG/users02.dbf
channel ORA_DISK_1: restore complete, elapsed time: 00:00:01
Finished restore at 11-AUG-24
cataloged datafile copy
datafile copy file name=/u01/app/oracle/oradata/TMISDG/users02.dbf RECID=1 STAMP=1176723893
datafile 5 switched to datafile copy
input datafile copy RECID=1 STAMP=1176723893 file name=/u01/app/oracle/oradata/TMISDG/users02.dbf
contents of Memory Script:
{
recover database from service 'tmis'; --直接在线进行增量备份和恢复
}
executing Memory Script
Starting recover at 11-AUG-24
using channel ORA_DISK_1
skipping datafile 5; already restored to SCN 3087398
channel ORA_DISK_1: starting incremental datafile backup set restore
channel ORA_DISK_1: using network backup set from service tmis
destination for restore of datafile 00001: /u01/app/oracle/oradata/TMISDG/system01.dbf
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: using network backup set from service tmis
destination for restore of datafile 00003: /u01/app/oracle/oradata/TMISDG/sysaux01.dbf
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: using network backup set from service tmis
destination for restore of datafile 00004: /u01/app/oracle/oradata/TMISDG/undotbs01.dbf
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: using network backup set from service tmis
destination for restore of datafile 00007: /u01/app/oracle/oradata/TMISDG/users01.dbf
channel ORA_DISK_1: restore complete, elapsed time: 00:00:01
starting media recovery
media recovery complete, elapsed time: 00:00:00
Finished recover at 11-AUG-24
Executing: alter system set standby_file_management=auto
Finished recover at 11-AUG-24
RMAN>
3.2、恢复过程解析
--从以上日志可知该命令执行过程描述如下：
This command will internally keep track of standby file locations,refresh standby controlfile from primary,update the new standby controlfile with standby file names,perform incremental backup on primary,transfer the backup-pieces over network to standby and perform recovery on standby.
该命令执行过程分为三个部分：
a、恢复备库控制文件，启动备库到mount阶段.
contents of Memory Script:
{
restore standby controlfile from service 'tmis';
alter database mount standby database;
}
b、修改备库控制文件中主库新增的数据文件路径.
contents of Memory Script:
{
set newname for datafile 5 to
"/u01/app/oracle/oradata/TMISDG/users02.dbf";
restore from service 'tmis' datafile 5;
catalog datafilecopy "/u01/app/oracle/oradata/TMISDG/users02.dbf";
switch datafile all;
}
c、在线增量恢复
contents of Memory Script:
{
recover database from service 'tmis';
}
4、open备库并开启实时应用
SQL> select open_mode from v$database;
OPEN_MODE
--------------------
MOUNTED
SQL> recover managed standby database disconnect;
Media recovery complete.
SQL> recover managed standby database cancel;
Media recovery complete.
SQL> alter database open;
Database altered.
SQL> recover managed standby database disconnect;
Media recovery complete.
5、备库增量数据确认
SQL> select * from books;
BK_ID BK_TITLE COPYRIGHT
---------- -------------------------------------------------- ------------------
11078 Learning MYSQL 01-JAN-10
11033 Study Html 01-JAN-11
11035 How to use php 01-JAN-03
11072 Teach yourself javascript 01-JAN-05
11028 Learning C++ 01-JAN-05
11069 MYSQL professional 01-JAN-09
11026 Guide to MySQL 5.7 01-JAN-08
11041 Inside VC++ 01-JAN-11
8 rows selected.
SQL> col name for a50
SQL> select FILE#,name ,status from v$datafile;
FILE# NAME STATUS
---------- -------------------------------------------------- -------
1 /u01/app/oracle/oradata/TMISDG/system01.dbf SYSTEM
3 /u01/app/oracle/oradata/TMISDG/sysaux01.dbf ONLINE
4 /u01/app/oracle/oradata/TMISDG/undotbs01.dbf ONLINE
5 /u01/app/oracle/oradata/TMISDG/users02.dbf ONLINE
7 /u01/app/oracle/oradata/TMISDG/users01.dbf ONLINE
[oracle@leo-19c-tmisdg archivelog]$ ls -ltr
total 33704
-rw-r----- 1 oracle oinstall 32526336 Aug 11 10:23 1_19_1174603581.dbf
-rw-r----- 1 oracle oinstall 921088 Aug 11 10:45 1_20_1174603581.dbf
-rw-r----- 1 oracle oinstall 286720 Aug 11 10:51 1_21_1174603581.dbf
-rw-r----- 1 oracle oinstall 390656 Aug 11 10:57 1_22_1174603581.dbf
-rw-r----- 1 oracle oinstall 381952 Aug 11 11:22 1_25_1174603581.dbf
注意：
a、 SEQUENCE#为23和24的归档日志文件并没有在备库重新生成;
b、 主库新增的books表数据在备库能正常查询显示;
c、 主库新增的users02.dbf数据文件在备库能正常查询显示.
--redo和standby日志文件路径确认
SQL> select * from v$logfile;
GROUP# STATUS TYPE MEMBER IS_ CON_ID
---------- ------- ------- ----------------------------------------------------- --- ----------
3 ONLINE /u01/app/oracle/oradata/TMISDG/redo03.log NO 0
2 ONLINE /u01/app/oracle/oradata/TMISDG/redo02.log NO 0
1 ONLINE /u01/app/oracle/oradata/TMISDG/redo01.log NO 0
11 STANDBY /u01/app/oracle/oradata/TMISDG/redo11_standby.log NO 0
12 STANDBY /u01/app/oracle/oradata/TMISDG/redo12_standby.log NO 0
13 STANDBY /u01/app/oracle/oradata/TMISDG/redo13_standby.log NO 0
14 STANDBY /u01/app/oracle/oradata/TMISDG/redo14_standby.log NO 0
7 rows selected.
SQL> select a.GROUP#,a.STATUS,b.TYPE,a.BYTES/1024/1024,a.FIRST_CHANGE#,a.NEXT_CHANGE#,b.member from v$log a,v$logfile b where a.group#=b.group#;
GROUP# STATUS TYPE A.BYTES/1024/1024 FIRST_CHANGE# NEXT_CHANGE# MEMBER
---------- ---------------- ------- ----------------- ------------- ------------ --------------------------------------------
3 INACTIVE ONLINE 200 3081977 3082974 /u01/app/oracle/oradata/TMISDG/redo03.log
2 ACTIVE ONLINE 200 3084340 9.2954E+18 /u01/app/oracle/oradata/TMISDG/redo02.log
1 INACTIVE ONLINE 200 3082974 3084340 /u01/app/oracle/oradata/TMISDG/redo01.log
6、主备实时同步验证
--主库删除表books
sys@TMIS> ! ip a | grep 133.101
inet 192.168.133.101/24 brd 192.168.133.255 scope global ens33
sys@TMIS> select count(*) from books;
COUNT(*)
----------
8
sys@TMIS> drop table books purge;
Table dropped.
--备库数据验证
SQL> ! ip a | grep 133.38
inet 192.168.133.38/24 brd 192.168.133.255 scope global noprefixroute ens33
SQL> select count(*) from books;
select count(*) from books
*
ERROR at line 1:
ORA-00942: table or view does not exist
说明：如上所示，主备实时同步正常.
7、实验总结
a、从oracle 18c开始，若无有效的归档日志恢复ADG GAP，只需单条命令即可完成GAP修复，该命令将多个步骤集成为单条命令，其原理和增量备份恢复相同;
b、无需再考虑primary和standby端需要有额外存储空间来存储增量备份集，特别对于GAP比较大的场景，优势特别明显;
c、通过网络在线传输，不用手动在主备之间进行备份集传输.
参考网址：https://blog.csdn.net/fanzhuozhuo/article/details/122753393验证oracle 19c单条命令恢复ADG GAP
精选 原创
©著作权归作者所有：来自51CTO博客作者Liujun_Deng的原创作品，请联系作者获取转载授权，否则将追究法律责任
提问和评论都可以，用心的回复会被更多人看到
评论
发布评论
相关文章
-
docker 安装oracle 19c
参考在安装的过程中需要准备一台机器，这里用虚拟机演示；因为oracle 19c对
oracle docker 数据库 xml -
Oracle 19c 上线了~
19c 客户端连接报错 ORA-01017
ORA-01017 19c客户端连接报错 -
docker 部署 Oracle 19c
docker 部署Oracle 19c
docker oracle
