项目描述：
将SqlSever 2008 R2中的数据实时或定时的同步到Mysql 5.6数据库中。| OS | DATABASE | |
| 来源数据库 | Window 2008 | MS SQL 2008 R2 |
| 目标数据库 | Linux | MySQL 5.6 |
实施方案：
如何初始化数据？
Navicat Premium--可以很方便的将MSSQL SERVER中的数据结构和数据初始化到Mysql数据库中。如何实现实时同步？
方案1：SyncNavigator--实现MSSQL SERVER和Mysql数据库之间的数据同步（可选在调度时间和机制）。 方案2：Oracle Goldengate--灵活的实现MSSQL SERVER和Mysql数据库之间的数据同步。两种方案的利弊？
方案1:，配置简单，但是对于目标端表中已经存在数据的情况处理麻烦（无法创建同步字段，这个字段是软件同步进程需要的） 方案2，配置复杂，效率高。使用OGG来实现MSSQL SERVER和MYSQL之间的数据同步
OGG 软件：
V34020-01Oracle GoldenGate V11.2.1.0.2 for SQL Server on Windows (64bit)
V32399-01
Oracle GoldenGate V11.2.1.0.1 for MySQL 5.x on Linux x86-64)
源端MSSQL SERVER配置
安装OGG
C:\OGG>ggsci退出后，切换到OGG目录下
Oracle GoldenGate Command Interpreter for SQL Server
Version 11.2.1.0.2 OGGCORE_11.2.1.0.2T3_PLATFORMS_120724.2205
Windows x64 (optimized), Microsoft SQL Server on Jul 25 2012 03:04:52
Copyright (C) 1995, 2012, Oracle and/or its affiliates. All rights reserved.
GGSCI (WIN-UGCMTTOTKE7) 1> create subdirs
Creating subdirectories under current directory C:\OGG
Parameter files C:\OGG\dirprm: already exists
Report files C:\OGG\dirrpt: created
Checkpoint files C:\OGG\dirchk: created
Process status files C:\OGG\dirpcs: created
SQL script files C:\OGG\dirsql: created
Database definitions files C:\OGG\dirdef: created
Extract data files C:\OGG\dirdat: created
Temporary files C:\OGG\dirtmp: created
Stdout files C:\OGG\dirout: created
GGSCI (WIN-UGCMTTOTKE7) 2>exit
C:\OGG>INSTALL ADDSERVICE
Service 'GGSMGR' created.
Install program terminated normally.
C:\OGG>
配置ODBC数据源
Microsoft SQL Server ODBC 驱动程序版本 06.01.7601
数据源名称: oa_test
数据源描述:
服务器: WIN-UGCMTTOTKE7
数据库: (Default)
语言: (Default)
翻译字符数据: Yes
日志长运行查询: No
日志驱动程序统计: No
使用区域设置: No
预定义的语句选项: 在断开时删除临时存储过程
使用故障转移服务器: No
使用 ANSI 引用的标识符: Yes
使用 ANSI 的空值，填充和警告: Yes
数据加密: No
配置OGG抽取进程
GGSCI (WIN-UGCMTTOTKE7) 8> dblogin sourcedb oa_test,userid yunwei,password "********"
2014-07-21 14:39:28 INFO OGG-03036 Database character set identified as windows-936. Locale: zh_Hans_CN
2014-07-21 14:39:28 INFO OGG-03037 Session character set identified as GBK.
Successfully logged into database.
GGSCI (WIN-UGCMTTOTKE7) 12> add trandata dbo.TEmployees2014-07-21 14:43:51 WARNING OGG-01483 The key for table [oa_test.dbo.TEmployees] contains one or more variable lengthcolumns. These columns may not have their pre-images written to the transaction log during updates. <span style="color:#ffff99;"> Please use KEYCOLS</span> to specify a key for Oracle GoldenGate to use on this table.Logging of supplemental log data is enabled for table dbo.TEmployeesGGSCI (WIN-UGCMTTOTKE7) 13> add trandata dbo.TRecords2014-07-21 14:46:04 WARNING OGG-01483 The key for table [oa_test.dbo.TRecords] contains one or more variable length columns. These columns may not have their pre-images written to the transaction log during updates. Please use KEYCOLS to specify a key for Oracle GoldenGate to use on this table.Logging of supplemental log data is enabled for table dbo.TRecordsGGSCI (WIN-UGCMTTOTKE7) 14> edit params oa
编辑如下内容：
defsfile c:\ogg\dirdef\oa.defsourcedb oa_test,userid yunwei,password "******"table dbo.TEmployees;table dbo.TRecords;
执行生成表结构定义文件
C:\OGG>defgen paramfile c:\ogg\dirprm\oa.prm将新生成的def文件拷贝到目标端！
查看mssql数据库处于完全恢复模式。
GGSCI (WIN-UGCMTTOTKE7) 3> edit param mgr填写如下内容：
port 7809
GGSCI (WIN-UGCMTTOTKE7) 5> start mgr
Starting Manager as service ('GGSMGR')...
Service started.
GGSCI (WIN-UGCMTTOTKE7) 8> info allProgram Status Group Lag at Chkpt Time Since CMANAGER RUNNINGGGSCI (WIN-UGCMTTOTKE7) 9> add extract emssql,tranlog,begin nowEXTRACT added.GGSCI (WIN-UGCMTTOTKE7) 10> add rmttrail ./dirdat/ms,extract emssqlRMTTRAIL added.
GGSCI (WIN-UGCMTTOTKE7) 11> edit params emssql编辑内容如下： EXTRACT EMSSQL
SOURCEDB oa_test,userid yunwei,password "******"
TRANLOGOPTIONS MANAGESECONDARYTRUNCATIONPOINT
RMTHOST 192.168.2.34, MGRPORT 7809
RMTTRAIL ./dirdat/ms
TABLE dbo.TEmployees;
TABLE dbo.TRecords;
执行全库备份。然后启动进程。并且 trunc. log on chkpt要设置为false
目标端MYSQL配置：
安装：
可参考mysql版本的OGG安装步骤，大同小异
配置复制进程：
GGSCI (localhost.localdomain) 2> dblogin sourcedb oa@127.0.0.1:3306,userid root,password xxxx
Successfully logged into database.
GGSCI (localhost.localdomain) 3> add replicat rmysql,exttrail ./dirdat/ms,nodbcheckpointREPLICAT added.GGSCI (localhost.localdomain) 4> edit params rmysql填写如下内容：replicat rmysql
TARGETDB oa@127.0.0.1:3306,userid root,password xxx
assumetargetdefs
sourcedefs ./dirdef/oa.def
reperror default,discard
discardfile ./dirrpt/rmysql.dsc,append,megabytes 100
MAP dbo.TEmployees,TARGET oa.temployees,keycols(Employee_ID);
MAP dbo.TRecords,TARGET oa.trecords,keycols(Record_ID),colmap(usedefaults,RinOut=inOut);
至此！配置完成。接下来就是进行insert update delete测试。