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@tnsname sql = SQL file name query = select statement field = separator string between fields record = separator string between records rows = print progress for every given rows (default, 1000000) file = output file name(default: uldrdata.txt) log = log file name, prefix with + to append mode fast = 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 = 2560M
MySQL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=$OGG_HOME:$PATH
2 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=$OGG_HOME:$PATH
2 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 RUNNING
5 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.checkpoint
Oracle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) 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;
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 00:00:04
2 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 5000
HANDLECOLLISIONS
REPORTROLLOVER AT 6:00
REPORTCOUNT EVERY 1 HOURS, RATE
MAP 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 (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;
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 (rac19a DBLOGIN as ogg) 17> add replicat r_init,specialrun REPLICAT added.
2 目标端查看同步的进度
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 5000 MAP test.test1, TARGET db1.test1; MAP test.test2, TARGET db1.test2;
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 Statistics
Bytes parsed 0
Bytes 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 00:00:01
2 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 0.00 Total updates 0.00 Total deletes 99.00 Total upserts 0.00 Total discards 0.00 Total operations 99.00 Total 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 0.00 Total updates 10.00 Total deletes 0.00 Total upserts 0.00 Total discards 0.00 Total 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, RATE MAP 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 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。
总结
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