GoldenGate 实现Oracle for Oracle 单向DDL操作同步
我们做如下测试
在源端执行表的truncate
SQL> truncate table tcustmer;
Table truncated.
在目的端，查看表数据
SQL> select count(*) from tcustmer;
COUNT(*)
----------
2
数据并没有同步
我们如何让Goldengate实现DDL操作的同步呢？
要想支持DDL同步，需要在源数据库上做些设置，使得可以跟踪DDL操作。包括如下内容Trigger、marker和history table，一个用户角色和其他各式各样的数据库对象。
首先要配置GLOBALS参数，告诉gg使用那个schema来存储DDL操作。
GGSCI (localhost.localdomain) 19> edit params ./GLOBALS
-- GoldenGate GLOBALS parameter file
--
GGSCHEMA GGDDL
2. 使用sqlplus 创建ggddl用户，并安装ddl支持
SQL> conn / as sysdba
Connected.
SQL> create user ggddl identified by ggddl ;
User created.
SQL> grant connect,resource to ggddl;
Grant succeeded.
关闭数据回收站功能
SQL> ALTER SYSTEM SET RECYCLEBIN = OFF scope=spfile;
System altered.
SQL> startup force
Oracle instance started.
Total System Global Area 835104768 bytes
Fixed Size 2217952 bytes
Variable Size 574621728 bytes
Database Buffers 255852544 bytes
Redo Buffers 2412544 bytes
Database mounted.
Database opened.
运行marker_setup.sql (ogg的安装目录，进入sqlplus)
[oracle@localhost ogg]$ sqlplus / as sysdba
SQL*Plus: Release 11.2.0.1.0 Production on Fri Sep 11 19:58:40 2015
Copyright (c) 1982, 2009, Oracle. All rights reserved.
Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
SQL> @marker_setup.sql
Marker setup script
You will be prompted for the name of a schema for the Oracle GoldenGate database objects.
NOTE: The schema must be created prior to running this script.
NOTE: Stop all DDL replication before starting this installation.
Enter Oracle GoldenGate schema name:GGDDL
Marker setup table script complete, running verification script...
Please enter the name of a schema for the GoldenGate database objects:
Setting schema name to GGDDL
MARKER TABLE
-------------------------------
OK
MARKER SEQUENCE
-------------------------------
OK
Script complete.
在弹出对话框输入GGSCHEMA的名称
运行ddl_setup.sql
SQL> @ddl_setup.sql
运行role_setup.sql
SQL> @role_setup.sql
GGS Role setup script
This script will drop and recreate the role GGS_GGSUSER_ROLE
To use a different role name, quit this script and then edit the params.sql script to change the gg_role parameter to the preferred name. (Do not run the script.)
You will be prompted for the name of a schema for the GoldenGate database objects.
NOTE: The schema must be created prior to running this script.
NOTE: Stop all DDL replication before starting this installation.
Enter GoldenGate schema name:ggddl
Wrote file role_setup_set.txt
PL/SQL procedure successfully completed.
Role setup script complete
Grant this role to each user assigned to the Extract, GGSCI, and Manager processes, by using the following SQL command:
GRANT GGS_GGSUSER_ROLE TO <loggedUser>
where <loggedUser> is the user assigned to the GoldenGate processes.
创建好角色后，并不是要把这个角色赋予ggddl用户，而是要将该角色赋予Extract，Replicat等使用的schema 。
我们之前配置的是system用户
SQL> GRANT GGS_GGSUSER_ROLE TO system;
Grant succeeded.
启用ddl，其实就是使trigger enable
SQL> @ddl_enable.sql
Trigger altered.
关闭Manager，Extract，Replicat
源端
GGSCI (localhost.localdomain) 1> stop Extract eorakk
GGSCI (localhost.localdomain) 5> stop mgr ！
目的端
GGSCI (localhost.localdomain) 1> stop replicat rorakk
Sending STOP request to REPLICAT RORAKK ...
Request processed.
GGSCI (localhost.localdomain) 2> stop manager
编辑Extract参数
GGSCI (localhost.localdomain) 5> edit params eorakk
--
-- Change Capture parameter file to capture
-- TCUSTMER and TCUSTORD Changes
--
EXTRACT EORAKK
USERID system, PASSWORD oracle
RMTHOST 192.168.199.104, MGRPORT 7809
EXTTRAIL ./dirdat/KK
DDL INCLUDE ALL
TABLE SCOTT.TCUSTMER;
TABLE SCOTT.TCUSTORD;
在原有基础上添加一行DDL INCLUDE ALL
编辑Replicat参数
GGSCI (localhost.localdomain) 4> edit params rorakk
--
-- Change Delivery parameter file to apply
-- TCUSTMER and TCUSTORD Changes
--
REPLICAT RORAKK
USERID system, PASSWORD oracle
HANDLECOLLISIONS
ASSUMETARGETDEFS
DISCARDFILE ./dirrpt/RORAKK.DSC, PURGE
DDL INCLUDE MAPPED
MAP scott.tcustmer, TARGET scott.tcustmer;
MAP scott.tcustord, TARGET scott.tcustord;
在原有基础上添加一行DDL INCLUDE MAPPED
启动Manager、Extract、Replicat
源端
GGSCI (localhost.localdomain) 6> start manager
Manager started.
GGSCI (localhost.localdomain) 7> start extract eorakk
Sending START request to MANAGER ...
EXTRACT EORAKK starting
目的端
GGSCI (localhost.localdomain) 5> start mgr
Manager started.
GGSCI (localhost.localdomain) 16> start replicat rorakk
Sending START request to MANAGER ...
REPLICAT RORAKK starting
验证数据
源端
SQL> truncate table tcustmer;
Table truncated.
SQL> desc tcustmer
Name Null? Type
----------------------------------------- -------- ----------------------------
CUST_CODE NOT NULL VARCHAR2(4)
NAME VARCHAR2(30)
CITY VARCHAR2(20)
STATE CHAR(2)
SQL> alter table tcustmer add state_desc varchar2(30);
Table altered.
目的端
SQL> select * from tcustmer;
no rows selected
SQL> desc tcustmer
Name Null? Type
----------------------------------------- -------- ----------------------------
CUST_CODE NOT NULL VARCHAR2(4)
NAME VARCHAR2(30)
CITY VARCHAR2(20)
STATE CHAR(2)
STATE_DESC VARCHAR2(30)
数据已同步。