OGG 单表初始化操做步骤

 

有时候ogg两端数据不一致，且数据量较大，手工修改比较复杂的状况下，咱们须要对这些表进行初始化。初始化的大概思路是：

1. 中止两端OGG

2. 若是业务不能够停很长时间，就须要配置目标端进程，暂停这些问题表的同步。待新数据导入后，再次停启进程

3. 源端经过SCN号备份问题表，传送到目标端还原

4. 修改目标端进程配置，从SCN开始恢复

5. 开启OGG进程

源端简陋配置：

GGSCI (db1) 9> info all

Program Status Group Lag at Chkpt Time Since Chkpt

MANAGER RUNNING

EXTRACT RUNNING EXTFPZX 00:00:00 00:00:05

GGSCI (db1) 10> view params EXTFPZX

extract extfpzx

userid ogg,password ogg

rmthost 192.168.25.101,mgrport 7809

rmttrail /u01/goldengate/dirdat/fp

ddl include mapped objname db_fpzx.*;

table db_fpzx.*;

目标端简陋配置：

GGSCI (db2) 6> info all

Program Status Group Lag at Chkpt Time Since Chkpt

MANAGER RUNNING

REPLICAT RUNNING REPFPZX 00:00:00 00:00:01

GGSCI (db2) 7> view params REPFPZX

REPLICAT repfpzx

USERID ogg,PASSWORD ogg

discardfile /u01/goldengate/discard/rep2_discard.dsc, append, megabytes 10

DDL INCLUDE MAPPED

DDLERROR DEFAULT IGNORE RETRYOP

ASSUMETARGETDEFS

map db_fpzx.*, target db_fpzx.*;

咱们对”liuliu”这张表进行初始化

SQL> select * from liuliu;

ID AGE NAME EEE WWW

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

2 liu liuliu222

3 liu 123 liuliu333

4 liu liuliu444

5 liu liuliu555

6 liu liuliu666

1 liu liuliu222

7 liu liuliu222

8 shshshs liuliu222

9 liu liuliu222

9 rows selected.

咱们将目标端中的数据删除，再在源端插入几条数据，是不会报错的，可是此时两端数据已经不一致了，须要对目标端进行初始化。通常来讲初始化是在你不知道丢失哪些数据的状况下进行，若是差个两三条你知道的数据，直接在目标端进行插入或修改更快。

SQL> delete from liuliu;

9 rows deleted.

SQL> commit;

Commit complete.

SQL> select * from liuliu;

no rows selected

1、中止两端OGG进程

源端查询SCN号：

SQL> select dbms_flashback.get_system_change_number from dual;

GET_SYSTEM_CHANGE_NUMBER

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

729295

2、源端经过SCN号备份问题表，传送到目标端还原

l 备份

exp db_fpzx/fpzx file=/u01/backup/db_fpzx20161129.dmp tables=(liuliu) log=/u01/backup/db_fpzx20161129.log flashback_scn=729295

l 传输

scp db_fpzx20161129.dmp oracle@192.168.25.101:/u01/backup

l 还原

imp system/oracle file=/u01/backup/db_fpzx20161129.dmp fromuser=db_fpzx touser=db_fpzx tables=liuliu ignore=y

3、修改目标端进程配置，从SCN开始还原

GGSCI (db2) 44> edit params REPFPZX

REPLICAT repfpzx

USERID ogg,PASSWORD ogg

discardfile /u01/goldengate/discard/rep2_discard.dsc, append, megabytes 10

DDL INCLUDE MAPPED

DDLERROR DEFAULT IGNORE RETRYOP

ASSUMETARGETDEFS

map db_fpzx.liuliu, target db_fpzx.liuliu, filter (@GETENV("transaction","csn") >729295);

map db_fpzx.*,target db_fpzx.*;

~

~4、启动OGG，查询两端状态