Oracle GoldenGate for Oracle 11g to PostgreSQL 9.2.4 Configu

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Oracle GoldenGate for Oracle 11g to PostgreSQL 9.2.4 Configuration

Installing and setting up Oracle GoldenGate connecting to an Oracle database

Also please make sure the Oracle database is in archive log mode

[oracle@ggos ~]$ sqlplus / as sysdba

SQL*Plus: Release 11.2.0.4.0 Production on Wed Sep 4 21:00:12 2013

Connected to:

Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production

With the Partitioning, OLAP, Data Mining and Real Application Testing options

SQL> alter system set log_archive_dest_1='LOCATION=/u01/app/oracle/oradata/arch';

System altered.

SQL> shutdown immediate

Database closed.

Database dismounted.

ORACLE instance shut down.

SQL> startup mount

ORACLE instance started.

Total System Global Area 835104768 bytes

Fixed Size 2257840 bytes

Variable Size 717229136 bytes

Database Buffers 113246208 bytes

Redo Buffers 2371584 bytes

Database mounted.

SQL> alter database archivelog;

Database altered.

SQL> alter database open;

Database altered.

SQL> archive log list

Database log mode Archive Mode

Automatic archival Enabled

Archive destination /u01/app/oracle/oradata/arch

Oldest online log sequence 3

Next log sequence to archive 5

Current log sequence 5

SQL>

In addition you should enable minimum supplemental logging

SQL> alter database add supplemental log data;

Database altered.

SQL> alter database force logging;

Database altered.

SQL> SELECT force_logging, supplemental_log_data_min FROM v$database;

FOR SUPPLEME

--- --------

YES YES

Add the GoldenGate directory to your LD_LIBRARY_PATH and PATH

export PATH=.:${JAVA_HOME}/bin:${PATH}:$HOME/bin:$ORACLE_HOME/bin:$ORACLE_HOME/OPatch:/u01/app/oracle/ggs

export LD_LIBRARY_PATH=$ORACLE_HOME/lib:/u01/app/oracle/ggs/lib

The first step is to open the GoldenGate command line interface and to create the necessary subdirectories

[oracle@ggos ggs]$ ./ggsci

Oracle GoldenGate Command Interpreter for Oracle

Version 11.2.1.0.7 16934304 OGGCORE_11.2.1.0.7_PLATFORMS_130709.1600.1_FBO

Linux, x64, 64bit (optimized), Oracle 11g on Jul 18 2013 07:04:28

GGSCI (ggos) 1> create subdirs

Creating subdirectories under current directory /u01/app/oracle/ggs

Parameter files /u01/app/oracle/ggs/dirprm: already exists

Report files /u01/app/oracle/ggs/dirrpt: created

Checkpoint files /u01/app/oracle/ggs/dirchk: created

Process status files /u01/app/oracle/ggs/dirpcs: created

SQL script files /u01/app/oracle/ggs/dirsql: created

Database definitions files /u01/app/oracle/ggs/dirdef: created

Extract data files /u01/app/oracle/ggs/dirdat: created

Temporary files /u01/app/oracle/ggs/dirtmp: created

Stdout files /u01/app/oracle/ggs/dirout: created

GGSCI (ggos) 2>

The second step is to create a parameter file for the manager which at least contains a PORT number for the manager

GGSCI (ggos) 3> edit param mgr

add the following content to the parameter file

GGSCI (ggos) 2> view param mgr

PORT 7809

Save the parameter file, exit from the editor, start the manager and verify if it is running

GGSCI (ggos) 1> start mgr

Manager started.

GGSCI (ggos) 2> info all

Program Status Group Lag at Chkpt Time Since Chkpt

MANAGER RUNNING

GGSCI (ggos) 3> info mgr

Manager is running (IP port ggos.7809).

Installing and setting up Oracle GoldenGate on the PostgreSQL machine

Then add the lib directory to the LD_LIBRARY_PATH and PATH

export LD_LIBRARY_PATH=/data/pgsql/lib:/data/pgsql/ggs/lib

export PATH=/data/pgsql/bin:/data/pgsql/ggs:$PATH

GoldenGate uses an ODBC connection to connect to the Postgres database. The ODBC driver is shipped with the installation and on Unix you have to create the ODBC configuration file which is commonly called odbc.ini on your own

Here the file I used

[postgres@ggpgt ggs]$ pwd

/data/pgsql/ggs

[postgres@ggpgt ggs]$ cat odbc.ini

[ODBC Data Sources]

GG_Postgres=DataDirect 6.1 PostgreSQL Wire Protocol

[ODBC]

IANAAppCodePage=106

InstallDir=/data/pgsql/ggs

[GG_Postgres]

Driver=/data/pgsql/ggs/lib/GGpsql25.so

Description=DataDirect 6.1 PostgreSQL Wire Protocol

Database=repdb

HostName=ggpgt

PortNumber=1521

LogonID=zwc

Password=zwc

Finally we need to export an ODBC environment variable which is called ODBCINI and points to the odbc.ini file we just created

export ODBCINI=/data/pgsql/ggs/odbc.ini

We've prepared the ODBC set up, now let's start with the GoldenGate set up. Similar to the installation on the Oracle database host we first create the GoldenGate subdirectories

[postgres@ggpgt ggs]$ ./ggsci

Oracle GoldenGate Command Interpreter

Version 11.2.1.0.2 OGGCORE_11.2.1.0.2T3_PLATFORMS_120724.2205

Linux, x64, 64bit (optimized), PostgreSQL on Jul 25 2012 00:32:24

GGSCI (ggpgt) 1> create subdirs

Creating subdirectories under current directory /data/pgsql/ggs

Parameter files /data/pgsql/ggs/dirprm: already exists

Report files /data/pgsql/ggs/dirrpt: created

Checkpoint files /data/pgsql/ggs/dirchk: created

Process status files /data/pgsql/ggs/dirpcs: created

SQL script files /data/pgsql/ggs/dirsql: created

Database definitions files /data/pgsql/ggs/dirdef: created

Extract data files /data/pgsql/ggs/dirdat: created

Temporary files /data/pgsql/ggs/dirtmp: created

Stdout files /data/pgsql/ggs/dirout: created

create the Manager parameter file and start the manager

GGSCI (ggpgt) 3> view param mgr

PORT 7809

Once we created the parameter file we can start the manager and check its status

GGSCI (ggpgt) 9> start mgr

Manager started.

GGSCI (ggpgt) 10> info all

Program Status Group Lag at Chkpt Time Since Chkpt

MANAGER RUNNING

GGSCI (ggpgt) 11> info mgr

Manager is running (IP port ggpgt.7809).

Demo table in Oracle and PostgreSQL

As mentioned, it is a basic set up without using initial load nor a data pump process. So we only create a simple table in Oracle and Postgres to replicate data. My Oracle database has a user called postgres and this user will now own a table ggtest

[oracle@ggos ~]$ sqlplus zwc

SQL*Plus: Release 11.2.0.4.0 Production on Wed Sep 4 21:40:03 2013

Enter password:

Connected to:

Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production

With the Partitioning, OLAP, Data Mining and Real Application Testing options

SQL> create table ggtest(col1 number,col2 varchar2(50));

Table created.

SQL> alter table ggtest add primary key(col1);

Table altered.

Then you can connect with a Postgres utility to the Postgres database and create a similar table in the public schema

[postgres@ggpgt ~]$ psql -U zwc -d repdb -h ggpgt

Password for user zwc:

psql (9.2.4)

Type "help" for help.

repdb=> create table "public"."ggtest"

repdb-> (

repdb(> "col1" integer NOT NULL,

repdb(> "col2" varchar(20),

repdb(> CONSTRAINT "PK_Col111" PRIMARY KEY ("col1")

repdb(> );

NOTICE: CREATE TABLE / PRIMARY KEY will create implicit index "PK_Col111" for table "ggtest"

CREATE TABLE

repdb-> \d+ ggtest

Table "public.ggtest"

--------+-----------------------+-----------+----------+--------------+-------------

Indexes:

"PK_Col111" PRIMARY KEY, btree (col1)

Has OIDs: no

Verify Oracle DB connection

To check the connection to the Oracle database we can use the GoldenGate command interface, log into the Oracle db, list the tables we can capture and check their data types

[oracle@ggos ggs]$ ./ggsci

Oracle GoldenGate Command Interpreter for Oracle

Version 11.2.1.0.7 16934304 OGGCORE_11.2.1.0.7_PLATFORMS_130709.1600.1_FBO

Linux, x64, 64bit (optimized), Oracle 11g on Jul 18 2013 07:04:28

GGSCI (ggos) 1> dblogin userid zwc, password zwc

Successfully logged into database.

GGSCI (ggos) 2> list tables *

ZWC.GGTEST

Found 1 tables matching list criteria.

GGSCI (ggos) 3> capture tabledef zwc.ggtest

Table definitions for ZWC.GGTEST:

COL1 NUMBER NOT NULL PK

COL2 VARCHAR (50)

Verify PostgreSQL ODBC connection

To check the ODBC connection to the Postgres database we also use the GoldenGate command line tool

[postgres@ggpgt ggs]$ ./ggsci

Oracle GoldenGate Command Interpreter

Version 11.2.1.0.2 OGGCORE_11.2.1.0.2T3_PLATFORMS_120724.2205

Linux, x64, 64bit (optimized), PostgreSQL on Jul 25 2012 00:32:24

GGSCI (ggpgt) 1> dblogin sourcedb gg_postgres userid zwc

Password:

2013-09-04 13:56:35 INFO OGG-03036 Database character set identified as UTF-8. Locale: en_US.

2013-09-04 13:56:35 INFO OGG-03037 Session character set identified as UTF-8.

Successfully logged into database.

GGSCI (ggpgt) 2> list tables *

public.ggtest

public.t

Found 2 tables matching list criteria.

GGSCI (ggpgt) 3> capture tabledef "public"."ggtest"

Table definitions for public.ggtest:

col1 NUMBER (10) NOT NULL PK

col2 VARCHAR (20)

GoldenGate extract process

In the following section we create an extract process that captures the changes for the GGTEST table in the Oracle database and copies the changes directly to the Postgres machine

Every process needs it config file, so let's create it for the extract process

GGSCI (ggos) 1> edit param epos

with these parameters

GGSCI (ggos) 3> view param epos

EXTRACT epos

SETENV (NLS_LANG="AMERICAN_AMERICA.ZHS16GBK")

SETENV (ORACLE_HOME="/u01/app/oracle/product/11.2.0/dbhome_1")

SETENV (ORACLE_SID="oraprod")

USERID zwc, PASSWORD zwc

RMTHOST ggpgt, MGRPORT 7809

RMTTRAIL /data/pgsql/ggs/dirdat/ep

TABLE zwc.ggtest;

My extract process is called epos and it connects as user ZWC using the password zwc to the Oracle database. It will extract changes on the Oracle table ggtest stored in the postgres schema and will put the information into a trail file on my Postgres machine.

Once we created the parameter file we can add the extract process and start it

GGSCI (ggos) 4> add extract epos, tranlog, begin now

EXTRACT added.

GGSCI (ggos) 5> add exttrail /data/pgsql/ggs/dirdat/ep, extract epos, megabytes 5

EXTTRAIL added.

GGSCI (ggos) 6> start epos

Sending START request to MANAGER ...

EXTRACT EPOS starting

GGSCI (ggos) 7> info all

Program Status Group Lag at Chkpt Time Since Chkpt

MANAGER RUNNING

EXTRACT RUNNING EPOS 00:00:00 00:00:00

GGSCI (ggos) 12> info extract epos

EXTRACT EPOS Last Started 2013-09-04 22:07 Status RUNNING

Checkpoint Lag 00:00:00 (updated 00:00:00 ago)

Log Read Checkpoint Oracle Redo Logs

2013-09-04 22:07:58 Seqno 7, RBA 18612736

SCN 0.1040942 (1040942)

Create DEFINITIONS File

We're replicating data in a heterogeneous environment, so we need to give the process loading the data into the Postgres database more details about the data in the extract file. This is done by creating a definitions file using defgen. As usual we have to create a parameter file

GGSCI (ggos) 17> view param defgen

DEFSFILE /u01/app/oracle/ggs/dirdef/GGTEST.def

USERID zwc, password zwc

TABLE ZWC.GGTEST;

Now exit from ggsci and call defgen on the command line and add the reference to the defgen parameter file just created

[oracle@ggos ggs]$ ./defgen paramfile ./dirprm/defgen.prm

***********************************************************************

Oracle GoldenGate Table Definition Generator for Oracle

Version 11.2.1.0.7 16934304 OGGCORE_11.2.1.0.7_PLATFORMS_130709.1600.1

Linux, x64, 64bit (optimized), Oracle 11g on Jul 18 2013 04:10:02

Starting at 2013-09-04 22:24:21

***********************************************************************

Operating System Version:

Linux

Version #1 SMP Wed Feb 22 17:37:40 EST 2012, Release 2.6.32-300.10.1.el5uek

Node: ggos

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: 29365

***********************************************************************

** Running with the following parameters **

***********************************************************************

DEFSFILE /u01/app/oracle/ggs/dirdef/GGTEST.def

USERID zwc, password ***

TABLE ZWC.GGTEST;

Retrieving definition for ZWC.GGTEST

Definitions generated for 1 table in /u01/app/oracle/ggs/dirdef/GGTEST.def

[oracle@ggos ggs]$ cat dirdef/GGTEST.def

*+- Defgen version 2.0, Encoding UTF-8

* Definitions created/modified 2013-09-04 22:24

* Field descriptions for each column entry:

* 1 Name

* 2 Data Type

* 3 External Length

* 4 Fetch Offset

* 5 Scale

* 6 Level

* 7 Null

* 8 Bump if Odd

* 9 Internal Length

* 10 Binary Length

* 11 Table Length

* 12 Most Significant DT

* 13 Least Significant DT

* 14 High Precision

* 15 Low Precision

* 16 Elementary Item

* 17 Occurs

* 18 Key Column

* 19 Sub Data Type

Database type: ORACLE

Character set ID: windows-936

National character set ID: UTF-16

Locale: neutral

Case sensitivity: 14 14 14 14 14 14 14 14 14 14 14 14 11 14 14 14

Definition for table ZWC.GGTEST

Record length: 112

Syskey: 0

Columns: 2

COL1 64 50 0 0 0 1 0 50 50 50 0 0 0 0 1 0 1 2

COL2 64 50 56 0 0 1 0 50 50 0 0 0 0 0 1 0 0 0

End of definition

Copy DEFGEN File

As the replicat process needs details about the source database, we copy the generated definitions file located on our Oracle machine in the <GoldenGate home>/dirdef/GGTEST.def to the target machine where the Postgres database is installed into the <GoldenGate home>./dirdef/GGTEST.def directory.

[oracle@ggos ggs]$ scp dirdef/GGTEST.def postgres@ggpgt:/data/pgsql/ggs/dirdef

The authenticity of host 'ggpgt (192.168.1.235)' can't be established.

RSA key fingerprint is a2:87:27:d3:58:63:76:72:ab:d3:84:8e:43:fc:d7:be.

Are you sure you want to continue connecting (yes/no)? yes

Warning: Permanently added 'ggpgt,192.168.1.235' (RSA) to the list of known hosts.

postgres@ggpgt's password:

GGTEST.def 100% 996 1.0KB/s 00:00

[oracle@ggos ggs]$

PostgreSQL replicat

Our extract process is set up to write all changes for the table GGTEST directly to the Postgres database machine into an extract file located in the dirdat directory. So we only need a process that reads those changes from the trail file and distributes it to the Postgres database. This process is called a replicat process running on the Postgres machine and it needs a parameter file

GGSCI (ggpgt) 6> view param rpos

REPLICAT rpos

SOURCEDEFS /data/pgsql/ggs/dirdef/GGTEST.def

SETENV ( PGCLIENTENCODING = "UTF8" )

SETENV (ODBCINI="/data/pgsql/ggs/odbc.ini" )

SETENV (NLS_LANG="AMERICAN_AMERICA.AL32UTF8")

TARGETDB GG_Postgres, USERID zwc, PASSWORD zwc

DISCARDFILE /data/pgsql/ggs/dirrpt/diskg.dsc, purge

MAP ZWC.GGTEST, TARGET public.ggtest, COLMAP (COL1=col1,COL2=col2);

Create the replicat process, start it and verify if it is running

GGSCI (ggpgt) 8> add replicat rpos, NODBCHECKPOINT, exttrail /data/pgsql/ggs/dirdat/ep

REPLICAT added.

GGSCI (ggpgt) 9> start rpos

Sending START request to MANAGER ...

REPLICAT RPOS starting

GGSCI (ggpgt) 10> info all

Program Status Group Lag at Chkpt Time Since Chkpt

MANAGER RUNNING

REPLICAT RUNNING RPOS 00:00:00 00:00:00

GGSCI (ggpgt) 11> info all

Program Status Group Lag at Chkpt Time Since Chkpt

MANAGER RUNNING

REPLICAT RUNNING RPOS 00:00:00 00:00:02

GGSCI (ggpgt) 12> view report rpos

***********************************************************************

Oracle GoldenGate Delivery

Version 11.2.1.0.2 OGGCORE_11.2.1.0.2T3_PLATFORMS_120724.2205

Linux, x64, 64bit (optimized), PostgreSQL on Jul 25 2012 01:37:05

Starting at 2013-09-04 14:34:27

***********************************************************************

Operating System Version:

Linux

Version #1 SMP Fri Jul 22 04:43:29 EDT 2011, Release 2.6.18-274.el5

Node: ggpgt

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: 22305

Description:

***********************************************************************

** Running with the following parameters **

***********************************************************************

2013-09-04 14:34:27 INFO OGG-03035 Operating system character set identified as UTF-8. Locale: en_US, LC_ALL:.

REPLICAT rpos

SOURCEDEFS /data/pgsql/ggs/dirdef/GGTEST.def

SETENV ( PGCLIENTENCODING = "UTF8" )

Set environment variable (PGCLIENTENCODING=UTF8)

SETENV (ODBCINI="/data/pgsql/ggs/odbc.ini" )

Set environment variable (ODBCINI=/data/pgsql/ggs/odbc.ini)

SETENV (NLS_LANG="AMERICAN_AMERICA.AL32UTF8")

Set environment variable (NLS_LANG=AMERICAN_AMERICA.AL32UTF8)

TARGETDB GG_Postgres, USERID zwc, PASSWORD ***

2013-09-04 14:34:27 INFO OGG-03036 Database character set identified as UTF-8. Locale: en_US.

2013-09-04 14:34:27 INFO OGG-03037 Session character set identified as UTF-8.

DISCARDFILE /data/pgsql/ggs/dirrpt/diskg.dsc, purge

MAP ZWC.GGTEST, TARGET public.ggtest, COLMAP (COL1=col1,COL2=col2);

2013-09-04 14:34:27 INFO OGG-01815 Virtual Memory Facilities for: COM

anon alloc: mmap(MAP_ANON) anon free: munmap

file alloc: mmap(MAP_SHARED) file free: munmap

target directories:

/data/pgsql/ggs/dirtmp.

CACHEMGR virtual memory values (may have been adjusted)

CACHESIZE: 2G

CACHEPAGEOUTSIZE (normal): 8M

PROCESS VM AVAIL FROM OS (min): 4G

CACHESIZEMAX (strict force to disk): 3.41G

Database Version:

PostgreSQL

Version 09.02.0004

ODBC Version 03.52.0000

Driver Information:

GGpsql25.so

Version 06.10.0068 (B0059, U0030)

ODBC Version 03.52

***********************************************************************

** Run Time Messages **

***********************************************************************

Opened trail file /data/pgsql/ggs/dirdat/ep000000 at 2013-09-04 14:34:27

Testing the configuration

Finally we can now test the whole set up and insert a record into the Oracle database

[oracle@ggos ~]$ sqlplus zwc

SQL*Plus: Release 11.2.0.4.0 Production on Wed Sep 4 22:38:16 2013

Enter password:

Connected to:

Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production

With the Partitioning, OLAP, Data Mining and Real Application Testing options

SQL> insert into ggtest values(1,'Hi Zhong Weicheng');

1 row created.

SQL> commit;

Commit complete.

SQL> select * from ggtest;

COL1 COL2

---------- --------------------------------------------------

1 Hi Zhong Weicheng

Check with a PostgreSQL tool if our newly inserted record is replicated

[postgres@ggpgt ggs]$ psql -U zwc -d repdb

psql (9.2.4)

Type "help" for help.

repdb=> select * from ggtest;

col1 | col2

------+-------------------

1 | Hi Zhong Weicheng

(1 row)

repdb=>

Check with GoldenGate tool logdump

[postgres@ggpgt ggs]$ ./logdump

Oracle GoldenGate Log File Dump Utility

Version 11.2.1.0.2 OGGCORE_11.2.1.0.2T3_PLATFORMS_120724.2205

Logdump 1 >open /data/pgsql/ggs/dirdat/ep000000

Current LogTrail is /data/pgsql/ggs/dirdat/ep000000

Logdump 2 >ghdr ON

Logdump 3 >headertoken on

Logdump 4 >usertoken on

Logdump 5 >detail on

Logdump 6 >detail data

Logdump 7 >n

TokenID x46 'F' Record Header Info xff80 Length 1050

TokenID x30 '0' TrailInfo Info x00 Length 429

TokenID x31 '1' MachineInfo Info x00 Length 102

TokenID x32 '2' DatabaseInfo Info x00 Length 357

TokenID x33 '3' ProducerInfo Info x00 Length 126

TokenID x34 '4' ContinunityInfo Info x00 Length 8

TokenID x5a 'Z' Record Trailer Info xff80 Length 1050

2013/09/04 22:07:34.254.624 FileHeader Len 1042 RBA 0

Name: *FileHeader*

3000 01ad 3000 0008 4747 0d0a 544c 0a0d 3100 0002 | 0...0...GG..TL..1...

0003 3200 0004 2000 0000 3300 0008 02f2 0bc2 c871 | ..2... ...3........q

2820 3400 0023 0021 7572 693a 6767 6f73 3a3a 7530 | ( 4..#.!uri:ggos::u0

313a 6170 703a 6f72 6163 6c65 3a67 6773 3a45 504f | 1:app:oracle:ggs:EPO

5336 0000 2100 1f2f 6461 7461 2f70 6773 716c 2f67 | S6..!../data/pgsql/g

6773 2f64 6972 6461 742f 6570 3030 3030 3030 3700 | gs/dirdat/ep0000007.

0001 0138 0000 0400 0000 0039 ff00 0800 0000 0000 | ...8.......9........

Logdump 8 >n

TokenID x47 'G' Record Header Info x01 Length 145

TokenID x48 'H' GHDR Info x00 Length 45

TokenID x44 'D' Data Info x00 Length 34

TokenID x54 'T' GGS Tokens Info x00 Length 46

TokenID x5a 'Z' Record Trailer Info x01 Length 145

___________________________________________________________________

Hdr-Ind : E (x45) Partition : . (x04)

UndoFlag : . (x00) BeforeAfter: A (x41)

RecLength : 34 (x0022) IO Time : 2013/09/04 14:38:19.020.741

IOType : 5 (x05) OrigNode : 255 (xff)

TransInd : . (x03) FormatType : R (x52)

SyskeyLen : 0 (x00) Incomplete : . (x00)

AuditRBA : 7 AuditPos : 18997776

Continued : N (x00) RecCount : 1 (x01)

2013/09/04 14:38:19.020.741 Insert Len 34 RBA 1050

Name: ZWC.GGTEST

After Image: Partition 4 G s

0000 0005 0000 0001 3100 0100 1500 0000 1148 6920 | ........1........Hi

5a68 6f6e 6720 5765 6963 6865 6e67 | Zhong Weicheng

Column 0 (x0000), Len 5 (x0005)

0000 0001 31 | ....1

Column 1 (x0001), Len 21 (x0015)

0000 0011 4869 205a 686f 6e67 2057 6569 6368 656e | ....Hi Zhong Weichen

67 | g

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