GoldenGate用于在各种企业系统间以亚秒级速度复制和集成事务数据，是同类最佳的、易于部署的产品。GoldenGate 可以灵活地在同类和异类系统（包括不同版本、不同的硬件平台）之间移动数据。
Oracle 于 2009 年收购了 GoldenGate，我们可以看到在全球各行业超过 4,000 个解决方案中实施了 Oracle GoldenGate。该软件执行实时的、基于日志的更改数据捕获 (CDC)，能够在异构数据库间以极低的延迟和很小的空间移动大量事务数据。
GoldenGate TDM 是基于日志的实时CDC软件平台，提供异构环境下大量交易数据的实时捕捉、变换和投递，同时保持亚秒一级的数据延迟。
基于GoldenGate TDM，我们提供高可用/容灾和实时数据集成的解决方案。
GoldenGate TDM 采用高内聚低耦合的结构，能够支持多种拓扑结构，包括一对一，一对多，多对一，多对多，层叠和双向复制。
1:GoldenGate 工作原理
2:交易数据管理
GoldenGate提供异构环境下交易数据的实时捕捉、变换、投递。
3:GoldenGate变化数据捕捉的优势
1:都提供基于日志的CDC
2:直接从数据库日志中通过自己的专有程序抽取数据
3:支持在备份系统上抓取变化数据
4:对一些数据类型如LONG,XML,BLOB都提供了支持
4:基于日志的实时数据复制
•亚秒级复制
•不依赖源数据库的触发器和规则，对源数据库影响小。
5:GG在数据传输方面的优势
1:GG有很好的机制来保证传输的交易一致性和断点续传。
2:事务完整性-事务级粒度
3:只复制成功提交的事务
4:防止源和目标的不一致性
实验：goldengate for mysql to mysql
（1）、点击下载 Oracle GoldenGate
（一）基础环境配置
| 源库 | 目标库 | |
| 操作系统版本 | CentOS Linux release 7.4 | CentOS Linux release 7.4 |
| IP地址 | 192.168.10.11 | 192.168.10.12 |
| 数据库版本 | 社区版 5.7.24 | 社区版 5.7.24 |
| 需要同步的数据库 | testdb（所有表） | testdb_repl |
| GoldenGate版本 | OGG-19.1.0.0.3 | OGG-19.1.0.0.3 |
（二）MySQL数据库初始信息
| 源库 | 目标库 | |
| MySQL安装位置（basedir） | /usr/local/mysql | /usr/local/mysql |
| 数据存放位置 （datadir） | /mysql/data | /mysql/data |
| 二进制日志位置 （log_bin） | /mysql/binlog | /mysql/binlog |
（三）MySQL数据库开启二进制日志
要使用ogg抽取数据，必须开启二进制日志。在mysql的配置文件/etc/my.cnf中配置二进制日志,重启数据库生效。
[mysqld] # binlog配置 server_id = 1 binlog_format=ROW log_bin=/mysql/binlog/master-bin sync_binlog=1 expire_logs_days=1
（四）源端和目标端安装配置GoldenGate（源端和目标端都要执行）
（4.1）源端和目标端创建安装ogg，实际上ogg并不需要安装，解压就可以使用
创建ogg安装路径
[root@masterdb ~]# mkdir /ogg
将安装包拷贝到该路径下解压：
[root@masterdb ogg]# ls ggs_Linux_x64_MySQL_64bit.tar [root@masterdb ogg]# tar -xvf ggs_Linux_x64_MySQL_64bit.tar ./ ./mysql_checklist.sql ...略 ./libicuuc.so.56.1 [root@masterdb ogg]# ls bcpfmt.tpl emsclnt libggnnzitp.so mysql.txt bcrypt.txt extract libggparam.so notices.txt cachefiledump freeBSD.txt libggperf.so oggerr checkprm ggcmd libggrepo.so prvtclkm.plb chkpt_mysql_create.sql ggMessage.dat libicudata.so.56 replicat convchk ggparam.dat libicudata.so.56.1 retrace convprm ggsci libicui18n.so.56 reverse db2cntl.tpl ggs_Linux_x64_MySQL_64bit.tar libicui18n.so.56.1 server defgen help.txt libicuuc.so.56 sqlldr.tpl demo_mysql_create.sql keygen libicuuc.so.56.1 tcperrs demo_mysql_insert.sql lib libmysqlclient.so.18 ucharset.h demo_mysql_load.sql lib12 libxerces-c-3.1.so UserExitExamples demo_mysql_misc.sql libantlr3c.so logdump usrdecs.h dirout libdb-6.1.so mgr zlib.txt dirwww libgglog.so mysql_checklist.sql
（4.2）使用ggsci创建ogg相关路径
[root@masterdb ogg]# pwd /ogg [root@masterdb ogg]# ./ggsci Oracle GoldenGate Command Interpreter for MySQL Version 12.2.0.2.2 OGGCORE_12.2.0.2.0_PLATFORMS_170630.0419 Linux, x64, 64bit (optimized), MySQL Enterprise on Jun 30 2017 06:32:17 Operating system character set identified as UTF-8. Copyright (C) 1995, 2017, Oracle and/or its affiliates. All rights reserved. GGSCI (masterdb) 1> create subdirs Creating subdirectories under current directory /ogg Parameter files /ogg/dirprm: created Report files /ogg/dirrpt: created Checkpoint files /ogg/dirchk: created Process status files /ogg/dirpcs: created SQL script files /ogg/dirsql: created Database definitions files /ogg/dirdef: created Extract data files /ogg/dirdat: created Temporary files /ogg/dirtmp: created Credential store files /ogg/dircrd: created Masterkey wallet files /ogg/dirwlt: created Dump files /ogg/dirdmp: created
（五）源端配置GoldenGate（源端执行）
（5.1）创建数据库用户ogg，该用户用来同步数据
mysql> GRANT ALL PRIVILEGES ON `testdb`.* TO 'ogg'@'%'IDENTIFIED BY 'ogg';
（5.2）配置管理进程mgr
GGSCI (masterdb) 1> edit param mgr port 7809 dynamicportlist 7840-7939 purgeoldextracts /ogg/dirdat/*,usecheckpoints, minkeepdays 1 GGSCI (masterdb) 2> start mgr Manager started. GGSCI (masterdb) 3> info all Program Status Group Lag at Chkpt Time Since Chkpt MANAGER RUNNING
(5.3)配置捕获进程exta
GGSCI (masterdb) 5> edit param exta extract exta sourcedb testdb@192.168.10.11:3306 userid ogg password ogg exttrail /ogg/dirdat/ea discardfile /ogg/dirrpt/exta.dsc,append TranLogOptions AltLogDest /mysql/binlog/master-bin.index table testdb.*; GGSCI (masterdb) 10> add extract exta,tranlog,begin now EXTRACT added. GGSCI (masterdb) 11> add exttrail /ogg/dirdat/ea,extract exta EXTTRAIL added.
(5.4)配置投递进程dmpa
GGSCI (masterdb) 15> edit param dmpa extract dmpa passthru sourcedb testdb@192.168.10.11:3306 userid ogg password ogg rmthost 192.168.10.12,mgrport 7809,compress rmttrail /ogg/dirdat/da dynamicresolution numfiles 3000 table testdb.*; GGSCI (masterdb) 16> add extract dmpa ,exttrailsource /ogg/dirdat/ea EXTRACT added. GGSCI (masterdb) 17> add rmttrail /ogg/dirdat/da,extract dmpa RMTTRAIL added.
(5.5)创建表定义文件，传送到目标端
（5.5.1）创建表定义文件
GGSCI (masterdb) 23> edit param defgen defsfile ./dirdef/testdb.def sourcedb testdb@192.168.10.11:3306 userid ogg, password ogg table testdb.*; GGSCI (masterdb) 26> exit
（5.5.2）生成表定义
[root@masterdb ogg]# ./defgen paramfile ./dirprm/defgen.prm *********************************************************************** Oracle GoldenGate Table Definition Generator for MySQL Version 12.2.0.2.2 OGGCORE_12.2.0.2.0_PLATFORMS_170630.0419 Linux, x64, 64bit (optimized), MySQL Enterprise on Jun 30 2017 07:27:58 Copyright (C) 1995, 2017, Oracle and/or its affiliates. All rights reserved. Starting at 2020-02-08 18:15:40 *********************************************************************** Operating System Version: Linux Version #1 SMP Tue Aug 22 21:09:27 UTC 2017, Release 3.10.0-693.el7.x86_64 Node: masterdb Machine: x86_64 soft limit hard limit Address Space Size : unlimited unlimited Heap Size : unlimited unlimited File Size : unlimited unlimited CPU Time : unlimited unlimited Process id: 2510 *********************************************************************** ** Running with the following parameters ** *********************************************************************** defsfile ./dirdef/testdb.def sourcedb testdb@192.168.10.11:3306 userid ogg, password *** table testdb.*; Expanding wildcard table specification testdb.*: Retrieving definition for testdb.test01. Retrieving definition for testdb.test02. Retrieving definition for testdb.test03. Definitions generated for 3 tables in ./dirdef/testdb.def.
（5.5.3）传送到目标端
[root@masterdb ogg]# scp /ogg/dirdef/testdb.def 192.168.10.12:/ogg/dirdef/ root@192.168.10.12's password: testdb.def 100% 1785 1.9MB/s 00:00
（六）目标端配置GoldenGate（目标端执行）
（6.1）创建数据库用户ogg，该用户用来同步数据
mysql> GRANT ALL PRIVILEGES ON `testdb_repl`.* TO 'ogg'@'%'IDENTIFIED BY 'ogg';
（6.2）配置管理进程mgr
GGSCI (slavedb) 3> edit param mgr port 7809 dynamicportlist 7840-7939 purgeoldextracts /ogg/dirdat/*,usecheckpoints, minkeepdays 1 GGSCI (slavedb) 5> start mgr Manager started. GGSCI (slavedb) 6> info all Program Status Group Lag at Chkpt Time Since Chkpt MANAGER RUNNING
（6.3）配置检查表
GGSCI (slavedb) 9> dblogin sourcedb testdb_repl@192.168.10.12:3306 userid ogg password ogg Successfully logged into database. GGSCI (slavedb DBLOGIN as ogg) 10> add checkpointtable testdb_repl.checkpoint Successfully created checkpoint table testdb_repl.checkpoint. GGSCI (slavedb DBLOGIN as ogg) 11> edit params ./GLOBALS checkpointtable testdb_repl.checkpoint
（6.4）配置应用进程repa
GGSCI (slavedb DBLOGIN as ogg) 13> edit params repa replicat repa targetdb testdb_repl@192.168.10.12:3306 userid ogg password ogg handlecollisions sourcedefs /ogg/dirdef/testdb.def discardfile /ogg/dirrpt/repa.dsc,purge map testdb.*, target testdb_repl.*;
GGSCI (slavedb DBLOGIN as ogg) 16> add replicat repa,exttrail /ogg/dirdat/da,checkpointtable testdb_repl.checkpoint
REPLICAT added.
（七）导入初始化数据
将源库需要同步的表导出，然后导入到目标数据库
# 源库导出，并传到目标数据库服务器上 [root@masterdb ~]# mysqldump -uroot -p123456 -h192.168.10.11 --single-transaction --flush-logs --master-data=2 testdb > testdb.sql mysqldump: [Warning] Using a password on the command line interface can be insecure. [root@masterdb ~]# ls anaconda-ks.cfg testdb.sql wgetlog-02-05-20-22:27.log wgetlog-02-05-20-22:28.log wget.sh [root@masterdb ~]# scp testdb.sql root@192.168.10.12:/root root@192.168.10.12's password: testdb.sql 100% 15MB 68.9MB/s 00:00
# 目标数据库执行导入 [root@slavedb ~]# mysql -uroot -p123456 testdb_repl < testdb.sql mysql: [Warning] Using a password on the command line interface can be insecure.
（八）开启ogg同步进程
(8.1)源端开启捕获进程（源端执行）
由于数据库数据一直在变化，所以对于导出的testdb.sql文件，我们需要记录二进制日志文件的log_file和log_pos
[root@slavedb ~]# cat testdb.sql |grep "CHANGE MASTER TO MASTER_LOG_FILE" -- CHANGE MASTER TO MASTER_LOG_FILE='master-bin.000005', MASTER_LOG_POS=154;
然后从导出时的binlog开始抽取
GGSCI (masterdb) 5> alter extract exta,vam,lognum 5,logpos 154 EXTRACT altered. GGSCI (masterdb) 6> start exta Sending START request to MANAGER ... EXTRACT EXTA starting
（8.2）开启投递进程（源端执行）
GGSCI (masterdb) 19> start dmpa Sending START request to MANAGER ... EXTRACT DMPA starting
（8.3）开启应用进程（目标端执行）
GGSCI (slavedb DBLOGIN as ogg) 18> start repa Sending START request to MANAGER ... REPLICAT REPA starting
（九）确认同步状态
（9.1）使用info all查看进程是否运行正常
所有进程状态为“running”代表正常
源端：
GGSCI (masterdb) 8> info all Program Status Group Lag at Chkpt Time Since Chkpt MANAGER RUNNING EXTRACT RUNNING DMPA 00:00:00 00:00:08 EXTRACT RUNNING EXTA 00:00:00 00:00:04
如果状态不正常可以用以下命令查看原因
查看日志：
view ggsevt
目标端replicat报错
view report rt1
目标端：
GGSCI (slavedb DBLOGIN as ogg) 23> info all Program Status Group Lag at Chkpt Time Since Chkpt MANAGER RUNNING REPLICAT RUNNING REPA 01:14:40 00:00:0
（9.2）源端手动插入数据，查看目标端是否同步
源端执行：
insert into test03 values(1,'a');
目标端查看数据是否同步过来：
mysql> use testdb_repl ; Database changed mysql> select * from test03; +-----+------+ | id3 | name | +-----+------+ | 1 | a | +-----+------+ 1 row in set (0.04 sec)
mysql:
create user 'oggadm1'@'%' identified by '123456';
grant all privileges on *.* to 'oggadm1'@'%';
flush privileges;
create database oggdb1;
exit
rpm -q *odbc*
yum install mysql-connector-odbc.x86_64
cat /etc/odbcinst.ini #Mysql 驱动
vim /etc/odbc.ini
[mysql]
Driver = MySQL #MySQL 是 /etc/odbcinst.ini
Server = 192.168.0.235
Port = 3306
User = oggadm1
Password = 123456
Database = oggdb1
Option = 3
Socket = /tmp/mysql.sock
测试：
isql mysql
