前言:
现今，Oracle数据迁移MySQL的需求已经越来越普遍，主要的迁移场景大致可以分为三类，第一类是涉及小表以及少量表的一次性迁移，无需进行增量同步，第二类是涉及大表以及多表的一次性迁移，第三类是涉及增量实时同步，而对于数据的迁移方法，常见的方式有使用第三方的同步工具CDC进行Oracle到MySQL的数据迁移、使用开源的同步工具以及应用层面进行迁移同步。
基于作者的迁移实施经验，本文接下来将讲述三种操作相对简单，可落地的Oracle数据迁移MySQL的方法。
测试迁移方法:
| 迁移方法 | 适合场景 | 测试场景 |
| navicat | 操作简单，同步效率一般，适合小表的一次性迁移 | Oracle一次性同步表test.test1到MySQL下的db1.test1 |
| navicat+sqluldr+load data infile | 操作较复杂，同步效率高，适合少量大表的一次性迁移 | Oracle一次性同步表test.test1到MySQL下的db1.test1 |
| navicat+Oracle GoldenGate(OGG) | 操作复杂，同步效率较高，适合需要大批量的大表进行迁移以及需要实时增量同步 | Oracle全量+实时增量同步表test.test1,test2到MySQL下的db1.test1,test2 |
迁移方式一(navicat)
这种迁移方式主要适合小表的一次性迁移，navicat的同步效率速度一般。
迁移开始之前，我们需要先安装navicat，在一台能访问Oracle源端和MySQL目标端的机器上安装即可。
安装完navicat之后，配置源端Oracle连接
配置目标端MySQL连接
开始进行迁移，选择工具--->数据传输
选择源端Oracle以及目标端MySQL
下一步选择要同步的表TEST，也可以选择同步全部表
传输模式选择自动，点下一步开始进行同步
传输同步完成，整个同步的效率还是较慢的，7.2W的数据，用了1分钟。
迁移方式二(navicat+sqluldr+load data infile)
这种迁移方式主要适合少量大表的一次性迁移，通过navicat工具进行Oracle-->MySQL表结构转化,再通过sqluldr将Oracle数据导出到本地文件，最后再通过load data infile将数据导入MySQL。
注:navicat工具虽然有同步数据的功能，但在实际的操作过程中，同步数据的效率以及成功率都很低，所以这里只作为数据字典转化的工具。
使用navicat工具进行表结构同步，步骤可以参考迁移方式一里面的操作，主要在数据传输同步时，选项里面只同步表结构，不创建记录。
点击开始，完成表结构同步
接下来进行数据的导出导入，先安装导出工具sqluldr
---解压安装包
unzip sqluldr2linux64.zip ./sqluldr2linux64.bin --help
---拷贝sqluldr2linux64.bin到$ORACLE_HOME的bin目录
cp -rp sqluldr2linux64.bin $ORACLE_HOME/bin
---重命名为sqluldr2.bin
mv sqluldr2linux64.bin sqluldr2.bin测试安装成功
[oracle@rac19a ~]$ sqluldr2.bin --help
SQL*UnLoader: Fast Oracle Text Unloader (GZIP, Parallel), Release 4.0.1
(@) Copyright Lou Fangxin (AnySQL.net) 2004 - 2010, all rights reserved.
License: Free for non-commercial useage, else 100 USD per server.
Usage: SQLULDR2 keyword=value [,keyword=value,...]
Valid Keywords:user = username/password@tnsnamesql = SQL file namequery = select statementfield = separator string between fieldsrecord = separator string between recordsrows = print progress for every given rows (default, 1000000) file = output file name(default: uldrdata.txt)log = log file name, prefix with + to append modefast = auto tuning the session level parameters(YES)text = output type (MYSQL, CSV, MYSQLINS, ORACLEINS, FORM, SEARCH).charset = character set name of the target database.ncharset= national character set name of the target database.parfile = read command option from parameter file
for field and record, you can use '0x' to specify hex character code,\r=0x0d \n=0x0a |=0x7c ,=0x2c, \t=0x09, :=0x3a, #=0x23, "=0x22 '=0x27使用sqluldr导出为文本类型为MYSQL
sqluldr2.bin user=test/oracle@pdb1 query="select * from test" text=MYSQL field=',' charset=AL32UTF8 head='NO' file=/home/oracle/test_001.csv log=test.log导出过程很快，58w的数据，只需要7秒
0 rows exported at 2022-10-12 22:18:14, size 0 MB.583680 rows exported at 2022-10-12 22:18:21, size 108 MB.output file /home/oracle/test_001.csv closed at 583680 rows, size 108 MB.再将从Oracle导出的MYSQL文件导入MySQL数据库
LOAD DATA INFILE '/tmp/test_001.csv' INTO TABLE test FIELDS TERMINATED BY ',' ENCLOSED BY '"';导入过程很快，58w的数据，只需要13秒
test@mysql.sock 22:38: [db1]>LOAD DATA INFILE '/tmp/test_001.csv' INTO TABLE test FIELDS TERMINATED BY ',' ENCLOSED BY '"';
Query OK, 583680 rows affected (13.43 sec)
Records: 583680 Deleted: 0 Skipped: 0 Warnings: 0整个数据同步过程还是较快的，但操作步骤较为繁琐，不太适合多表操作。
迁移方式三(navicat+Oracle GoldenGate(OGG))
这种迁移方式适合大批量的大表或者需要增量同步的表进行迁移，支持全量初始化+Oracle GoldenGate(OGG)增量同步，通过navicat工具进行Oracle-->MySQL表结构转化，再通过数据同步工具OGG进行全量表初始化以及后续的增量同步。
注意:使用增量方式同步的表都需要有主键，确保每行数据的唯一。
先使用navicat进行表结构的转化，具体参考迁移方式二里面的步骤。
Oracle源端配置OGG准备
1 数据库开启归档模式
---查看是否开启归档模式
archive log list
---开启归档模式
startup mount
alter database archvielog ;
alter database open;
2 数据库开启force_logging
---查看是否开启force logging
select force_logging from v$database;
----开启force logging
alter database force logging;
alter system switch logfile;
3 数据库开启补充日志supplemental logging
---查看补充日志
SELECT supplemental_log_data FROM v$database;
---开启补充日志
ALTER DATABASE ADD SUPPLEMENTAL LOG DATA;
Alter system switch logfile;
4 开启ogg参数
alter system set enable_goldengate_replication=true scope=both;
5 配置stream_pool大小
(MAX_SGA_SIZE * # of integrated Extracts) + 25% head room
For example, using the default values for the MAX_SGA_SIZE with two integrated Extracts:
( 1GB * 2 ) * 1.25 = 2.50GB STREAMS_POOL_SIZE = 2560MMySQL目标端配置OGG准备
1 开启bin_log
---确认是否开启bin_log
show variables like 'log_bin';
2 开启bin_log(需要重启生效)
在my,cnf 中 [mysqld] 添加如下
[mysqld]
# binlog configuration
log-bin = /usr/local/var/mysql/logs/mysql-bin.log
expire-logs-days = 14
max-binlog-size = 500M
server-id = 1
2 确认binlog_format
----确认格式为row
show variables like 'binlog_format';
3 确认sql_mode
----确认包含STRICT_TRANS_TABLES
show variables like 'sql_mode';
4 确认版本
----确认版本，5.7.10之后才支持部分DDL
（CREATE TABLE, ALTER TABLE, and DROP TABLE operations are supported.）
select version();创建ogg同步用户
1 oracle源端同步用户创建
create tablespace ogg_tbs datafile size 1g;
create user ogg identified by "oggoracle";
grant resource,dba,connect to ogg;2 mysql目标端同步用户创建
CREATE USER ogg IDENTIFIED by "oggmysql";
GRANT ALL PRIVILEGES ON *.* TO 'ogg'@'%';Oracle源端安装ogg软件
1 配置环境变量
---/home/oracle/.bash_profile
export OGG_HOME=/u01/app/ogg
export PATH=$OGG_HOME:$PATH2 解压安装ogg软件
---解压安装ogg软件，安装包:p31766135_191004_Linux-x86-64.zip
cd /tmp/
unzip p31766135_191004_Linux-x86-64.zip
cd 31766135/
mv files/* /u01/app/ogg/
---验证
oracle@rac19b ~]$ ggsci
Oracle GoldenGate Command Interpreter for Oracle
Version 19.1.0.0.4 31637694_FBO
Linux, x64, 64bit (optimized), Oracle 19c on Aug 19 2020 20:08:53
Operating system character set identified as UTF-8.
Copyright (C) 1995, 2019, Oracle and/or its affiliates. All rights reserved.
GGSCI (rac19b) 1>3 创建ogg配置目录
GGSCI (rac19b) 10> create subdirs
Creating subdirectories under current directory /home/oracle
Parameter file /u01/app/ogg/dirprm: created.
Report file /u01/app/ogg/dirrpt: created.
Checkpoint file /u01/app/ogg/dirchk: created.
Process status files /u01/app/ogg/dirpcs: created.
SQL script files /u01/app/ogg/dirsql: created.
Database definitions files /u01/app/ogg/dirdef: created.
Extract data files /u01/app/ogg/dirdat: created.
Temporary files /u01/app/ogg/dirtmp: created.
Credential store files /u01/app/ogg/dircrd: created.
Masterkey wallet files /u01/app/ogg/dirwlt: created.
Dump files /u01/app/ogg/dirdmp: created.
GGSCI (rac19b) 11>4 启动MGR进程
---编辑mgr配置
cd /u01/app/ogg/
./ggsci
GGSCI (rac19b) 1> edit params mgr
---配置以下参数
PORT 7809
autorestart extract * ,waitminutes 2,resetminutes 5
PURGEOLDEXTRACTS /u01/app/ogg/dirdat/*,USECHECKPOINTS,MINKEEPDAYS 5
LAGREPORTHOURS 1
LAGINFOMINUTES 30
LAGCRITICALMINUTES 45
---启动mgr进程
GGSCI (rac19b) 1> start mgr
Manager started.
GGSCI (rac19b) 2> info all
Program Status Group Lag at Chkpt Time Since Chkpt
MANAGER RUNNING
MySQL目标端安装ogg软件
1 配置环境变量
---/etc/profile
export OGG_HOME=/opt/ogg
export PATH=$OGG_HOME:$PATH2 解压安装ogg软件
---解压安装ogg软件，安装包:ggs_Linux_x64_MySQL_64bit.tar
cd ogg/
tar xvf /tmp/ggs_Linux_x64_MySQL_64bit.tar
---验证
[mysql@rac19a ~]$ ggsci
Oracle GoldenGate Command Interpreter for MySQL
Version 19.1.0.0.3 OGGCORE_19.1.0.0.0_PLATFORMS_190907.0144
Linux, x64, 64bit (optimized), MySQL Enterprise on Sep 7 2019 08:41:32
Operating system character set identified as UTF-8.
Copyright (C) 1995, 2019, Oracle and/or its affiliates. All rights reserved.3 创建ogg配置目录
GGSCI (rac19a) 1> create subdirs
Creating subdirectories under current directory /home/mysql
Parameter file /opt/ogg/dirprm: created.
Report file /opt/ogg/dirrpt: created.
Checkpoint file /opt/ogg/dirchk: created.
Process status files /opt/ogg/dirpcs: created.
SQL script files /opt/ogg/dirsql: created.
Database definitions files /opt/ogg/dirdef: created.
Extract data files /opt/ogg/dirdat: created.
Temporary files /opt/ogg/dirtmp: created.
Credential store files /opt/ogg/dircrd: created.
Masterkey wallet files /opt/ogg/dirwlt: created.
Dump files /opt/ogg/dirdmp: created.4 启动MGR进程
---编辑mgr配置
cd /opt/ogg/
./ggsci
GGSCI (rac19b) 1> edit params mgr
---配置以下参数
PORT 7809
AUTOSTART REPLICAT *
AUTORESTART REPLICAT *,RETRIES 5,WAITMINUTES 2,RESETMINUTES 10
PURGEOLDEXTRACTS /opt/ogg/dirdat/*,USECHECKPOINTS,MINKEEPDAYS 5
ACCESSRULE, PROG *, IPADDR 192.168.2.*, ALLOW
LAGREPORTHOURS 1
LAGINFOMINUTES 30
LAGCRITICALMINUTES 45
---启动mgr进程
GGSCI (rac19a) 2> start mgr
Manager started.
GGSCI (rac19a) 3> info all
Program Status Group Lag at Chkpt Time Since Chkpt
MANAGER RUNNING5 配置全局文件以及检查表
---ogg连接MySQL
GGSCI (rac19a DBLOGIN as ogg) 8> dblogin sourcedb db1@192.168.2.201:3306,userid ogg,password oggmysql
Successfully logged into database.
---创建检查表
GGSCI (rac19a DBLOGIN as ogg) 9> ADD CHECKPOINTTABLE db1.checkpoint
Successfully created checkpoint table db1.checkpoint.
GGSCI (rac19a DBLOGIN as ogg) 10>
---配置文件设置全局检查表
GGSCI (rac19a DBLOGIN as ogg) 10> edit params ./GLOBALS
---添加以下配置
CHECKPOINTTABLE db1.checkpointOracle源端配置抽取以及投递进程(增量进程)
1 对同步表添加补充日志
---ogg连接Oracle
GGSCI (rac19b) 3> dblogin userid ogg password oggoracle
Successfully logged into database.
---为表test.test1添加同步日志
GGSCI (rac19b as ogg@testdb) 4> add trandata test.test1
2022-10-13 13:08:58 INFO OGG-15132 Logging of supplemental redo data enabled for table TEST.TEST1.
2022-10-13 13:08:58 INFO OGG-15133 TRANDATA for scheduling columns has been added on table TEST.TEST1.
2022-10-13 13:08:58 INFO OGG-15135 TRANDATA for instantiation CSN has been added on table TEST.TEST1.
2022-10-13 13:08:59 INFO OGG-10471 ***** Oracle Goldengate support information on table TEST.TEST1 *****
Oracle Goldengate support native capture on table TEST.TEST1.
Oracle Goldengate marked following column as key columns on table TEST.TEST1: ID.
---为表test.test2添加同步日志
GGSCI (rac19b as ogg@testdb) 5> add trandata test.test2
2022-10-13 13:09:04 INFO OGG-15132 Logging of supplemental redo data enabled for table TEST.TEST2.
2022-10-13 13:09:04 INFO OGG-15133 TRANDATA for scheduling columns has been added on table TEST.TEST2.
2022-10-13 13:09:04 INFO OGG-15135 TRANDATA for instantiation CSN has been added on table TEST.TEST2.
2022-10-13 13:09:04 INFO OGG-10471 ***** Oracle Goldengate support information on table TEST.TEST2 *****
Oracle Goldengate support native capture on table TEST.TEST2.
Oracle Goldengate marked following column as key columns on table TEST.TEST2: ID.
GGSCI (rac19b as ogg@testdb) 6>2 创建EXTRACT抽取进程
GGSCI (rac19b as ogg@testdb) 6> add extract E_TEST tranlog,begin now,threads 1
EXTRACT added.
GGSCI (rac19b as ogg@testdb) 7> add exttrail ./dirdat/es,extract E_TEST,megabytes 1000
EXTTRAIL added.
GGSCI (rac19b as ogg@testdb) 8> info all
Program Status Group Lag at Chkpt Time Since Chkpt
MANAGER RUNNING
EXTRACT STOPPED E_TEST 00:00:00 00:00:20
3 设置EXTRACT抽取进程参数
GGSCI (rac19b) 2> edit params e_test
extract E_TEST
SETENV (ORACLE_HOME = "/u01/app/oracle/product/19.0.0/dbhome_1")
SETENV (ORACLE_SID = "testdb")
SETENV (NLS_LANG = "AMERICAN_AMERICA.AL32UTF8")
userid ogg, password oggoracle
exttrail ./dirdat/es
gettruncates
TRANLOGOPTIONS INCLUDEREGIONID,EXCLUDEUSER ogg
TRANLOGOPTIONS BUFSIZE 2048000
TRANLOGOPTIONS DBLOGREADER,DBLOGREADERBUFSIZE 2048000
DISCARDFILE ./dirrpt/E_TEST.dsc,APPEND,MEGABYTES 1000
DISCARDROLLOVER AT 6:00
REPORTROLLOVER AT 6:00
REPORTCOUNT EVERY 1 HOURS,RATE
FETCHOPTIONS MISSINGROW ABEND
STATOPTIONS REPORTFETCH
WARNLONGTRANS 1H,CHECKINTERVAL 10m
DYNAMICRESOLUTION
TABLE TEST.TEST1;
TABLE TEST.TEST2;4 创建EXTRACT投递进程
GGSCI (rac19b) 3> add extract P_TEST,exttrailsource ./dirdat/es
EXTRACT added.
GGSCI (rac19b) 4> add RMTTRAIL ./dirdat/rs,ext P_TEST,megabytes 1000
RMTTRAIL added.
GGSCI (rac19b) 5>
5 设置EXTRACT投递进程参数
extract P_TEST
userid ogg, password oggoracle
rmthost 192.168.2.201, mgrport 7809
rmttrail /opt/ogg/dirdat/rs
passthru
DISCARDFILE ./dirrpt/P_TEST.dsc,APPEND,MEGABYTES 1000
DISCARDROLLOVER AT 6:00
REPORTROLLOVER AT 6:00
REPORTCOUNT EVERY 1 HOURS,RATE
TABLE TEST.TEST1;
TABLE TEST.TEST2;6 启动源端抽取以及投递进程
---启动抽取以及投递进程
GGSCI (rac19b) 8> start *test
Sending START request to MANAGER ...
EXTRACT E_TEST starting
Sending START request to MANAGER ...
EXTRACT P_TEST starting
---确认状态正常running
GGSCI (rac19b) 14> info all
Program Status Group Lag at Chkpt Time Since Chkpt
MANAGER RUNNING
EXTRACT RUNNING E_TEST 00:00:02 00:00:07
EXTRACT RUNNING P_TEST 00:00:00 00:00:03
GGSCI (rac19b) 15>
---确认目标端能接收到队列文件
[mysql@rac19a dirdat]$ ls -rlth
total 20K
-rw-r----- 1 mysql mysql 19K Oct 13 13:24 rs000000000
[mysql@rac19a dirdat]$ MySQL目标端配置复制进程(增量进程)
1 添加复制进程
GGSCI (rac19a DBLOGIN as ogg) 11> add replicat r_test,exttrail /opt/ogg/dirdat/rs,checkpointtable db1.checkpoint
REPLICAT added.
GGSCI (rac19a DBLOGIN as ogg) 12> info all
Program Status Group Lag at Chkpt Time Since Chkpt
MANAGER RUNNING
REPLICAT STOPPED R_TEST 00:00:00 00:00:042 配置复制进程参数
GGSCI (rac19a DBLOGIN as ogg) 13> edit params r_test
replicat r_test
setenv (MYSQL_HOME="/usr/local/mysql")
setenv (MYSQL_UNIX_PORT="/opt/mysql/data/mysql.sock")
dboptions host 192.168.2.201,connectionport 3306
targetdb db1,userid ogg, password oggmysql
discardfile /opt/ogg/dirrpt/r_test.dsc,append,megabytes 1000
DISCARDROLLOVER AT 6:00
REPERROR (DEFAULT, ABEND)
MAXTRANSOPS 5000HANDLECOLLISIONS
REPORTROLLOVER AT 6:00
REPORTCOUNT EVERY 1 HOURS, RATEMAP test.test1, TARGET db1.test1; MAP test.test2, TARGET db1.test2;3 HANDLECOLLISIONS参数说明
参数是实现 OGG 全量数据与增量数据衔接的关键，其实现原理是在全量数据初始完成之后，开启增量抽取进程，应用全量数据初始化期间产生的 redo log。
当全量应用完成后，开启增量回放进程，应用全量期间的增量数据。可能会出现数据冲突的情况，这就是为什么表一定要有主键或者唯一键，使用该参数后增量回放 DML 语句时主要有以下冲突场景及处理逻辑：
1 目标端不存在 delete 语句的记录，忽略该问题并不记录到 discardfile。
2 目标端丢失 update 记录，更新的是主键值，update 转换成 insert，更新的键值是非主键，忽略该问题并不记录到 discardfile。
3 目标端重复 insert 已存在的主键值，这将被 replicat 进程转换为 UPDATE 现有主键值的。
4 在初始化数据，并追完增量数据之后，建议把HANDLECOLLISIONS参数去掉，Oracle官方建议不要一直使用该参数,这可能导致数据不准。
Oracle源端配置数据初始化进程(数据全量初始化进程)
1 添加初始化进程
GGSCI (rac19b) 17> add extract e_init,sourceistable
EXTRACT added.2 配置初始化进程
GGSCI (rac19b) 20> edit params e_init
extract e_init
SETENV (ORACLE_HOME = "/u01/app/oracle/product/19.0.0/dbhome_1")
SETENV (ORACLE_SID = "testdb")
SETENV (NLS_LANG = "AMERICAN_AMERICA.AL32UTF8")
userid ogg, password oggoracle
RMTHOST 192.168.2.201,MGRPORT 7809
RMTTASK REPLICAT,GROUP r_init
table test.test1;
table test.test2;MySQL目标端配置数据初始化进程(数据全量初始化进程)
1 添加初始化进程
GGSCI (rac19a DBLOGIN as ogg) 17> add replicat r_init,specialrun
REPLICAT added.2 配置初始化进程
GGSCI (rac19a DBLOGIN as ogg) 18> edit params r_init
replicat r_init
setenv (MYSQL_HOME="/usr/local/mysql")
setenv (MYSQL_UNIX_PORT="/opt/mysql/data/mysql.sock")
dboptions host 192.168.2.201,connectionport 3306
targetdb db1,userid ogg, password oggmysql
discardfile /opt/ogg/dirrpt/r_init.dsc,append,megabytes 1000
MAXTRANSOPS 5000MAP test.test1, TARGET db1.test1; MAP test.test2, TARGET db1.test2;全量数据初始化
数据初始化会将全表的数据通过创建的ogg进程e_init,r_init从Oracle源端同步到MySQL目标端。
1 启动Oracle源端的e_init初始化进程
GGSCI (rac19b) 22> start e_init
Sending START request to MANAGER ...
EXTRACT E_INIT starting2 目标端查看同步的进度
GGSCI (rac19a DBLOGIN as ogg) 56> view report r_init
2022-10-13 14:30:57 INFO OGG-06509 Using the following key columns for source table TEST.TEST1: ID.
2022-10-13 14:30:57 INFO OGG-06509 Using the following key columns for source table TEST.TEST2: ID.
2022-10-13 14:31:03 INFO OGG-02911 Processing table TEST.TEST1.
2022-10-13 14:33:14 INFO OGG-02911 Processing table TEST.TEST2.
***********************************************************************
* ** Run Time Statistics ** *
***********************************************************************
3 同步完成，会输出总的数量
Report at 2022-10-13 14:35:19 (activity since 2022-10-13 14:30:57)
Output to r_init:
From Table TEST.TEST1:# inserts: 999901# updates: 0# deletes: 0# upserts: 0# discards: 0
From Table TEST.TEST2:# inserts: 1000000# updates: 0# deletes: 0# upserts: 0# discards: 0
REDO Log StatisticsBytes parsed 0Bytes output 285986537增量数据同步
1 启动目标端复制进程r_test
GGSCI (rac19a DBLOGIN as ogg) 65> start r_test
Sending START request to MANAGER ...
REPLICAT R_TEST starting
GGSCI (rac19a DBLOGIN as ogg) 66> info all
Program Status Group Lag at Chkpt Time Since Chkpt
MANAGER RUNNING
REPLICAT RUNNING R_TEST 00:00:00 00:00:012 查看增量同步信息
GGSCI (rac19a DBLOGIN as ogg) 67> stats r_test
Sending STATS request to REPLICAT R_TEST ...
Start of Statistics at 2022-10-13 14:45:24.
Replicating from TEST.TEST1 to db1.test1:
---collisions解决冲突数据的行数
*** Total statistics since 2022-10-13 14:45:17 ***Total inserts 0.00Total updates 0.00Total deletes 99.00Total upserts 0.00Total discards 0.00Total operations 99.00Total delete collisions 99.00
Replicating from TEST.TEST2 to db1.test2:
---增量update了10行
*** Total statistics since 2022-10-13 14:45:17 ***Total inserts 0.00Total updates 10.00Total deletes 0.00Total upserts 0.00Total discards 0.00Total operations 10.00
End of Statistics.
3 注释去除HANDLECOLLISIONS参数
注:要在增量同步进程应用完初始化期间产生的日志以及实时同步之后，再去除参数。
#编辑配置文件，注释---HANDLECOLLISIONS
GGSCI (rac19a DBLOGIN as ogg) 71> edit params r_test
replicat r_test
setenv (MYSQL_HOME="/usr/local/mysql")
setenv (MYSQL_UNIX_PORT="/opt/mysql/data/mysql.sock")
dboptions host 192.168.2.201,connectionport 3306
targetdb db1,userid ogg, password oggmysql
discardfile /opt/ogg/dirrpt/r_test.dsc,append,megabytes 1000
DISCARDROLLOVER AT 6:00
REPERROR (DEFAULT, ABEND)
MAXTRANSOPS 5000
---HANDLECOLLISIONS
REPORTROLLOVER AT 6:00
REPORTCOUNT EVERY 1 HOURS, RATEMAP test.test1, TARGET db1.test1;MAP test.test2, TARGET db1.test2;
#重启进程生效
GGSCI (rac19a DBLOGIN as ogg) 73> stop r_test
Sending STOP request to REPLICAT R_TEST ...
Request processed.
GGSCI (rac19a DBLOGIN as ogg) 74> start r_test
Sending START request to MANAGER ...
REPLICAT R_TEST starting
GGSCI (rac19a DBLOGIN as ogg) 75>4 测试数据同步情况
Oracle源端删除999行数据，当前数据99001
SQL> select count(*) from test.test2;
COUNT(*)
----------1000000
SQL> delete from test.test2 where rownum<1000;
999 rows deleted.
SQL> commit;
Commit complete.
SQL> select count(*) from test.test2;
COUNT(*)
----------999001
SQL>MySQL目标端同步删除的操作，数据 一致都为999001
root@mysql.sock 14:33: [db1]>select count(*) from db1.test2;
+----------+
| count(*) |
+----------+
| 999001 |
+----------+
1 row in set (0.17 sec)
root@mysql.sock 14:54: [db1]>
使用navicat+Oracle GoldenGate(OGG)的方式，操作步骤比较复杂，但如果需要迁移的表多，并且需要实时的增量同步，那么还是比较适合的。
