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擅长主流Oracle、MySQL、PG、高斯及Greenplum运维开发，备份恢复，安装迁移，性能优化、故障应急处理等。
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前言

本文详细介绍了我的OGG旅程、从OGG实现Oracle19C到postgreSQL14的实时同步

---

📣 1.架构设计

主机名	IP	操作系统	内存/空间	角色	说明
ora19c	172.18.12.90	centos7.8	2c/18G 400G	源端	Oracle 19.3
postgres14	172.18.12.50	centos7.8	2c/18G 400G	目标库	postgreSQL 14

📣 2.OGG下载

1.官方下载
https://www.oracle.com/middleware/technologies/goldengate-downloads.html
1.OGG for oracle安装包
213000_fbo_ggs_Linux_x64_Oracle_shiphome.zip
2.OGG for PostgreSQL安装包
213000_ggs_Linux_x64_PostgreSQL_64bit.zip

📣 3.安装OGG for Oracle

✨ 3.1 解压授权

mkdir /ogg
mkdir /soft
chown oracle.oinstall /ogg

unzip /opt/213000_fbo_ggs_Linux_x64_Oracle_shiphome.zip -d /soft
cd /soft/fbo_ggs_Linux_x64_Oracle_shiphome/Disk1/
chown -R oracle.oinstall *

✨ 3.2. 静默安装

#使用oracle用户安装ogg
[root@jemora19c ~]# su - oracle
[oracle@jemora19c ~]$ cd /soft/fbo_ggs_Linux_x64_Oracle_shiphome/Disk1/

./runInstaller -silent
oracle.install.responseFileVersion=/oracle/install/rspfmt_ogginstall_response_schema_v21_1_0
INSTALL_OPTION=ORA19c
SOFTWARE_LOCATION=/ogg
START_MANAGER=true
MANAGER_PORT=7809
DATABASE_LOCATION=/opt/oracle/product/19c/dbhome_1
INVENTORY_LOCATION=/opt/oracle/oraInventory
UNIX_GROUP_NAME=oinstall

✨ 3.3 环境变量

cat >>  /home/oracle/.bash_profile <<"EOF"
export OGG_HOME=/ogg
export PATH=$OGG_HOME:$ORACLE_HOME/bin:$PATH
export LD_LIBRARY_PATH=$OGG_HOME:$ORACLE_HOME/lib:$LD_LIBRARYPATH
alias ggsci='cd $OGG_HOME;ggsci'
EOF

source /home/oracle/.bash_profile

[oracle@jemora19c ~]$ ggsci

Oracle GoldenGate Command Interpreter for Oracle
Version 21.3.0.0.0 OGGCORE_21.3.0.0.0_PLATFORMS_210728.1047_FBO
Oracle Linux 7, x64, 64bit (optimized), Oracle Database 21c and lower supported versions on Jul 29 2021 03:59:23
Operating system character set identified as UTF-8.

Copyright (C) 1995, 2021, Oracle and/or its affiliates. All rights reserved.



GGSCI (jemora19c) 1> info all

Program     Status      Group       Lag at Chkpt  Time Since Chkpt
MANAGER     RUNNING     

✨ 3.4 创建目录

oracle@jemora19c ~]$ ggsci
GGSCI (jemora19c) 2> create subdirs

📣 4.安装OGG for postgreSQL

✨ 4.1 解压及授权

mkdir /ogg
unzip /opt/213000_ggs_Linux_x64_PostgreSQL_64bit.zip
tar vxf ggs_Linux_x64_PostgreSQL_64bit.tar -C /ogg
chown -R postgres.postgres /ogg

✨ 4.2 修改环境变量

cat >> /var/lib/pgsql/.bash_profile <<"EOF"
export OGG_HOME=/ogg
export PATH=$OGG_HOME:$PATH
export LD_LIBRARY_PATH=$OGG_HOME/lib:$LD_LIBRARY_PATH
alias ggsci='cd $GG_HOME;ggsci'
EOF

source /var/lib/pgsql/.bash_profile 

✨ 4.3 创建目录

GGSCI (postgres14) 2> create subdirs

📣 5.Oracle配置

✨ 5.1 开归档

– mount阶段
alter database archivelog;
archive log list;

✨ 5.2 打开附加日志

lter system set enable_goldengate_replication=true;
alter database add supplemental log data;

SELECT supplemental_log_data_min min,
supplemental_log_data_pk pk,
supplemental_log_data_ui ui,
supplemental_log_data_fk fk,
supplemental_log_data_all allc
FROM v$database;

📣 6.MGR管理进程

cat > /ogg/dirprm/mgr.prm << “EOF”
PORT 7809
DYNAMICPORTLIST 7810-7830
AUTOSTART EXTRACT *
AUTORESTART EXTRACT , RETRIES 100, WAITMINUTES 2, RESETMINUTES 10
PURGEOLDEXTRACTS ./dirdat/, usecheckpoints, minkeepdays 30
LAGREPORTHOURS 1
LAGINFOMINUTES 30
LAGCRITICALMINUTES 45
EOF

📣 7.抽取进程extract

cat > /ogg/dirprm/ext_ora.prm << “EOF”
extract ext_ora
setenv (ORACLE_SID=oradb)
setenv (ORACLE_HOME=/opt/oracle/product/19c/dbhome_1)
setenv (NLS_LANG=“AMERICAN_AMERICA.AL32UTF8”)
userid PGOGG@oradb,password oracle
exttrail /ogg/dirdat/ex
table PGOGG.test01;
table STEST.*;
EOF

– 添加进程
add extract ext_ora, tranlog, begin now
add exttrail /ogg/dirdat/ex, extract ext_ora

📣 8.传送进程pump

cat > /ogg/dirprm/pump_ora.prm << “EOF”
extract pump_ora
setenv (ORACLE_SID=oradb)
setenv (ORACLE_HOME=/opt/oracle/product/19c/dbhome_1)
setenv (NLS_LANG=“AMERICAN_AMERICA.AL32UTF8”)
rmthost 172.18.12.50,mgrport 7809,compress
rmttrail /ogg/dirdat/ex
table PGOGG.test01;
table STEST.*;
EOF

📣 9.目标端配置

cat > /ogg/dirprm/rep_pg.prm <<“EOF”
replicat rep_pg
SOURCEDEFS ./dirdef/defgen_PG.prm
SETENV(PGCLIENTENCODING = “UTF8” )
SETENV(ODBCINI=“/ogg/odbc.ini” )
SETENV(NLS_LANG=“AMERICAN_AMERICA.AL32UTF8”)
TARGETDB PGDSN, userid stest, password post
DISCARDFILE ./discard/rep_pg.dsc, append
–ap lhrogg.test01, target lhrogg.test01;
map stest., target stest.;
EOF

📣 10.测试同步

-- oracle查询
col table_name format a30
SELECT a.table_name,a.num_rows FROM dba_tables a where a.OWNER='STEST' order by num_rows desc ;

SYS@oradb> delete from STEST.LOGON;
2383 rows deleted.

SYS@oradb> select count(*) from STEST.LOGON;

  COUNT(*)
----------
         0
         
jemdb=# select count(*) from stest.LOGON;
 count 
-------
     0
(1 row)

-- 在pg中查询数据量
select  nspname AS schemaname,
	relname,
	reltuples::numeric as rowcount,
	pg_size_pretty (
	pg_total_relation_size ( '"' || nspname || '"."' || relname || '"' )) AS SIZE
from    pg_class C LEFT JOIN pg_namespace N ON ( N.oid = C.relnamespace ) 
where   nspname NOT IN ( 'pg_catalog', 'information_schema' ) 
	AND relkind = 'r' 
ORDER by reltuples DESC 
LIMIT 20;

 schemaname |       relname        | rowcount |    size    
------------+----------------------+----------+------------
 stest      | inventories          |   899441 | 433 MB
 stest      | order_items          |     7341 | 1072 kB
 stest      | addresses            |     1500 | 264 kB
 stest      | card_details         |     1500 | 264 kB
 stest      | orders               |     1430 | 376 kB
 stest      | product_information  |     1000 | 400 kB
 stest      | warehouses           |     1000 | 192 kB
 stest      | customers            |     1000 | 440 kB
 stest      | product_descriptions |     1000 | 288 kB
 stest      | logon                |        0 | 16 kB
 stest      | orderentry_metadata  |       -1 | 8192 bytes
 pgogg      | test01               |       -1 | 8192 bytes
 stest      | checkpointtab        |       -1 | 32 kB
 stest      | checkpointtab_lox    |       -1 | 16 kB
(14 rows)


GGSCI (postgres14) 2> stats rep_pg,table stest.logon, total

Sending STATS request to Replicat group REP_PG ...

Start of statistics at 2023-12-02 00:27:37.

Replicating from STEST.LOGON to stest.logon:

*** Total statistics since 2023-12-02 00:24:44 ***
    Total inserts                              0.00
    Total updates                              0.00
    Total deletes                           2383.00
    Total upserts                              0.00
    Total discards                             0.00
    Total operations                        2383.00