1. GoldenGate specified time points to re-extract
1.1. See source current SCN, record this value as a time point of re-extraction
SQL> select dbms_flashback.get_system_change_number from dual;
GET_SYSTEM_CHANGE_NUMBER
------------------------
1497417
1.2. View the status of current extraction process ext1
GGSCI (cndba) 16> info ext1 detail
EXTRACT EXT1 Last Started 2018-06-18 11:38 Status RUNNING
Checkpoint Lag 00:00:00 (updated 00:00:10 ago)
Log Read Checkpoint Oracle Redo Logs
2018-06-18 12:09:23 Thread 1, Seqno 59, RBA 1452032
SCN 0.1497446 (1497446)
Target Extract Trails:
Remote Trail Name Seqno RBA Max MB
./dirdat/et 2 1075 100
Extract Source Begin End
/u01/app/oracle/oradata/cndba/redo02.log 2018-06-17 23:58 2018-06-18 12:09
/u01/app/oracle/oradata/cndba/redo01.log 2018-06-17 23:08 2018-06-17 23:58
/u01/app/oracle/oradata/cndba/redo01.log 2018-06-17 22:45 2018-06-17 23:08
Not Available * Initialized * 2018-06-17 22:45
/u01/app/oracle/oradata/cndba/redo01.log * Initialized * 2018-06-17 22:30
/u01/app/oracle/oradata/cndba/redo03.log 2018-06-17 19:51 2018-06-17 21:06
/u01/app/oracle/oradata/cndba/redo03.log * Initialized * 2018-06-17 19:51
/u01/app/oracle/oradata/cndba/redo03.log * Initialized * 2018-06-17 19:47
/u01/app/oracle/oradata/cndba/redo03.log 2018-06-17 19:47 2018-06-17 19:47
/u01/app/oracle/oradata/cndba/redo03.log * Initialized * 2018-06-17 19:47
/u01/app/oracle/oradata/cndba/redo03.log 2018-06-17 16:46 2018-06-17 16:47
/u01/app/oracle/oradata/cndba/redo03.log 2018-06-17 16:39 2018-06-17 16:46
/u01/app/oracle/oradata/cndba/redo03.log * Initialized * 2018-06-17 16:39
/u01/app/oracle/oradata/cndba/redo03.log 2018-06-17 16:37 2018-06-17 16:39
/u01/app/oracle/oradata/cndba/redo03.log * Initialized * 2018-06-17 16:37
/u01/app/oracle/oradata/cndba/redo03.log * Initialized * 2018-06-17 16:37
/u01/app/oracle/oradata/cndba/redo03.log 2018-06-13 15:00 2018-06-17 16:37
/u01/app/oracle/oradata/cndba/redo01.log 2018-06-12 18:53 2018-06-13 15:00
/u01/app/oracle/oradata/cndba/redo03.log 2018-06-12 17:26 2018-06-12 18:53
/u01/app/oracle/oradata/cndba/redo03.log 2018-06-12 13:38 2018-06-12 17:26
/u01/app/oracle/oradata/cndba/redo03.log 2018-06-12 11:08 2018-06-12 13:38
/u01/app/oracle/oradata/cndba/redo03.log 2018-06-12 09:54 2018-06-12 11:08
/u01/app/oracle/oradata/cndba/redo03.log 2018-06-12 01:07 2018-06-12 09:54
/u01/app/oracle/oradata/cndba/redo02.log 2018-06-11 21:54 2018-06-12 01:07
/u01/app/oracle/oradata/cndba/redo02.log * Initialized * 2018-06-11 21:54
/u01/app/oracle/oradata/cndba/redo01.log 2018-06-11 18:46 2018-06-11 18:58
/u01/app/oracle/oradata/cndba/redo01.log * Initialized * 2018-06-11 18:46
/u01/app/oracle/oradata/cndba/redo01.log 2018-06-11 18:36 2018-06-11 18:39
/u01/app/oracle/oradata/cndba/redo01.log * Initialized * 2018-06-11 18:36
/u01/app/oracle/oradata/cndba/redo01.log 2018-06-11 18:34 2018-06-11 18:36
/u01/app/oracle/oradata/cndba/redo01.log * Initialized * 2018-06-11 18:34
/u01/app/oracle/oradata/cndba/redo01.log 2018-06-11 18:30 2018-06-11 18:34
/u01/app/oracle/oradata/cndba/redo01.log * Initialized * 2018-06-11 18:30
/u01/app/oracle/oradata/cndba/redo01.log 2018-06-11 18:27 2018-06-11 18:30
/u01/app/oracle/oradata/cndba/redo01.log * Initialized * 2018-06-11 18:27
/u01/app/oracle/oradata/cndba/redo01.log 2018-06-11 18:25 2018-06-11 18:27
/u01/app/oracle/oradata/cndba/redo01.log * Initialized * 2018-06-11 18:25
/u01/app/oracle/oradata/cndba/redo01.log 2018-06-11 17:19 2018-06-11 18:25
/u01/app/oracle/oradata/cndba/redo03.log 2018-06-11 17:19 2018-06-11 17:19
/u01/app/oracle/oradata/cndba/redo03.log * Initialized * 2018-06-11 17:19
/u01/app/oracle/oradata/cndba/redo03.log 2018-06-11 17:19 2018-06-11 17:19
/u01/app/oracle/oradata/cndba/redo03.log 2018-06-11 17:19 2018-06-11 17:19
/u01/app/oracle/oradata/cndba/redo03.log 2018-06-11 17:19 2018-06-11 17:19
/u01/app/oracle/oradata/cndba/redo03.log 2018-06-11 17:19 2018-06-11 17:19
/u01/app/oracle/oradata/cndba/redo03.log 2018-06-11 17:19 2018-06-11 17:19
/u01/app/oracle/oradata/cndba/redo03.log 2018-06-11 17:19 2018-06-11 17:19
/u01/app/oracle/oradata/cndba/redo03.log 2018-06-11 17:06 2018-06-11 17:19
/u01/app/oracle/oradata/cndba/redo03.log * Initialized * 2018-06-11 17:06
/u01/app/oracle/oradata/cndba/redo02.log 2018-06-11 14:32 2018-06-11 14:49
/u01/app/oracle/oradata/cndba/redo02.log * Initialized * 2018-06-11 14:32
/u01/app/oracle/oradata/cndba/redo02.log 2018-06-08 18:28 2018-06-11 10:05
/u01/app/oracle/oradata/cndba/redo03.log 2018-06-08 00:47 2018-06-08 18:28
/u01/app/oracle/oradata/cndba/redo02.log 2018-06-07 18:05 2018-06-08 00:47
/u01/app/oracle/oradata/cndba/redo01.log 2018-06-07 16:15 2018-06-07 18:05
Not Available * Initialized * 2018-06-07 16:15
/u01/app/oracle/oradata/cndba/redo03.log * Initialized * 2018-06-07 16:30
/u01/app/oracle/oradata/cndba/redo03.log * Initialized * 2018-06-07 16:30
/u01/app/oracle/oradata/cndba/redo03.log 2018-06-07 16:15 2018-06-07 16:30
Not Available * Initialized * 2018-06-07 16:15
/u01/app/oracle/oradata/cndba/redo03.log * Initialized * 2018-06-07 16:11
/u01/app/oracle/oradata/cndba/redo03.log * Initialized * 2018-06-07 16:11
/u01/app/oracle/oradata/cndba/redo03.log 2018-06-07 16:08 2018-06-07 16:11
Current directory /u01/app/oracle/ogg
Report file /u01/app/oracle/ogg/dirrpt/EXT1.rpt
Parameter file /u01/app/oracle/ogg/dirprm/ext1.prm
Checkpoint file /u01/app/oracle/ogg/dirchk/EXT1.cpe
Process file /u01/app/oracle/ogg/dirpcs/EXT1.pce
Stdout file /u01/app/oracle/ogg/dirout/EXT1.out
Error log /u01/app/oracle/ogg/ggserr.log
1.3. View the current system time and local trail file currently exists
[[email protected] dirdat]# ls -l et*
-rw-rw-rw- 1 oracle oinstall 1016 Jun 17 23:08 et000000
-rw-rw-rw- 1 oracle oinstall 1213 Jun 18 11:38 et000001
-rw-rw-rw- 1 oracle oinstall 1075 Jun 18 11:38 et000002
1.4. Inserts data source
SQL> conn test/test
Connected.
SQL> begin for i in 1001..1000000 loop
insert into test values(i,'test');
end loop;
commit;
end;
/ 2 3 4 5 6
PL/SQL procedure successfully completed.
SQL> select count(*) from test;
COUNT(*)
----------
999005
--目标端查看成功同步
SQL> conn test/test
Connected.
SQL> select count(*) from test;
COUNT(*)
----------
999005
源端生成一个新的tail 文件
[[email protected] dirdat]# ls -l et*
-rw-rw-rw- 1 oracle oinstall 1016 Jun 17 23:08 et000000
-rw-rw-rw- 1 oracle oinstall 1213 Jun 18 11:38 et000001
-rw-rw-rw- 1 oracle oinstall 99999960 Jun 18 12:14 et000002
-rw-rw-rw- 1 oracle oinstall 13888313 Jun 18 12:14 et000003
1.5. According to SCN, find the corresponding time
SQL> select to_char(scn_to_timestamp(1497417),'yyyy-mm-dd hh24:mi:ss') scn from dual;
SCN
-------------------
2018-06-18 12:08:22
1.6. Data Delete end target has been successfully copied
SQL> delete from test where id>=1001;
999000 rows deleted.
SQL> commit;
Commit complete.
SQL> select count(*) from test;
COUNT(*)
----------
5
1.7. Extraction process to extract from the 2018-06-18 12:08:22 affairs again
--源端操作
GGSCI (cndba) 24> stop ext1
Sending STOP request to EXTRACT EXT1 ...
Request processed.
GGSCI (cndba) 25> alter extract ext1,TRANLOG, BEGIN 2018-06-18 12:08:22
EXTRACT altered.
GGSCI (cndba) 26> start ext1
Sending START request to MANAGER ...
EXTRACT EXT1 starting
GGSCI (cndba) 27> info all
Program Status Group Lag at Chkpt Time Since Chkpt
MANAGER RUNNING
EXTRACT RUNNING EXT1 00:22:25 00:00:01
EXTRACT RUNNING EXT2 00:00:00 00:00:07
EXTRACT RUNNING PUMP1 00:00:00 00:00:07
EXTRACT RUNNING PUMP2 00:00:00 00:00:03
目标端数据被重新复制
SQL> select count(*) from test;
COUNT(*)
----------
999005