Oracle数据迁移MySQL

牛牛的笔记

12890人浏览 · 2022-10-12 16:22:19

牛牛的笔记 · 2022-10-12 16:22:19 发布

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 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      00:00:04

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 (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 5000
 MAP 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 starting

2 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 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<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。

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