IBM Change Data Capture (CDC) Replication step by step guide to install, configure and create instance

This tutorial covers step by step guide  to install and  configure  IBM Change Data Capture (CDC) (Data Replication)  in Linux machine. Also covers that how to create CDC instance for replications. Now let us see the steps to install and configure Change Data Capture in Linux.


Brief Steps

1. Install IBM Change Data Capture Engine (IBM CDC) (in this example, version 6.5) on both source and target machines

2. Create CDC instance on both servers

3. Install Access Server, create  user and start Access Server.

4. Install Management Console in the  client machine and connect to Access Server

5. Create Subscriptions and start replication


Installing  IBM Change Data Capture (IBM DB2) 6.5

1. Copy necessary setup files to any folder in the server where you want to install IBM CDC.

2. Change to the folder where installation binary file is located

3. Make the installation binary file executable and start installation

[root@test ISCDC_652_DB2LUW]# ./setup-cdc-linux-x86-db2luw.bin
-bash: ./setup-cdc-linux-x86-db2luw.bin: Permission denied
[root@test ISCDC_652_DB2LUW]# chmod 777 setup-cdc-linux-x86-db2luw.bin
[root@test ISCDC_652_DB2LUW]# ./setup-cdc-linux-x86-db2luw.bin

Preparing to install...
Extracting the JRE from the installer archive...
Unpacking the JRE...
Extracting the installation resources from the installer archive...
Configuring the installer for this system's environment...

Launching installer...

Preparing CONSOLE Mode Installation...

===============================================================================
Installer                                        (created with InstallAnywhere)
-------------------------------------------------------------------------------


===============================================================================
Introduction
------------

InstallAnywhere will guide you through the installation of IBM InfoSphere
Change Data Capture (IBM DB2) 6.5

Respond to each prompt to proceed to the next step in the installation.  If you
want to change something on a previous step, type 'back'.

You may cancel this installation at any time by typing 'quit'.

PRESS <ENTER> TO CONTINUE:


Now Press Enter

===============================================================================


    International Program License Agreement is displayed

Press Enter to continue viewing the license agreement, or enter "1" to
   accept the agreement, "2" to decline it, "3" to print it, or "99" to go back
   to the previous screen.: 1

===============================================================================
Choose Install Folder

Where would you like to install?

  Default Install Folder: /opt/IBM/InfoSphereChangeDataCapture/ReplicationEngineforIBMDB2


Change install folder if required and  press Enter


ENTER AN ABSOLUTE PATH, OR PRESS <ENTER> TO ACCEPT THE DEFAULT
      : /opt/IBM/CDC/Engine

INSTALL FOLDER IS: /opt/IBM/CDC/Engine
   IS THIS CORRECT? (Y/N): Y

Press Y

===============================================================================
Pre-Installation Summary


Please Review the Following Before Continuing:

Product Name:
    IBM InfoSphere Change Data Capture (IBM DB2)

Install Folder:
    /opt/IBM/CDC/Engine

Link Folder:
    /tmp/install.dir..../Do_Not_Install

Disk Space Information (for Installation Target):
    Required:  .... bytes
    Available: .... bytes

PRESS <ENTER> TO CONTINUE:

Press enter to continue..


===============================================================================
Installing...
-------------

 [==================|==================|==================|==================]
 [------------------|------------------|------------------|------------------]



===============================================================================

Install Complete

Congratulations. IBM InfoSphere Change Data Capture (IBM DB2) has been successfully installed to:
   /opt/IBM/CDC/Engine

You can launch the Configuration Tool at any time by running
   /opt/IBM/CDC/Engine/bin/dmconfigurets



Now IBM CDC installation is complete.  Now let us configure and create CDC Instance



Creating New Instance 

Launch Configuration Tool? (1=Yes, 2=No) (DEFAULT: 1): 1
Welcome to the configuration tool for IBM InfoSphere Change Data Capture (IBM DB2). Use this tool to create instances of IBM InfoSphere Change Data Capture (IBM DB2).

Press ENTER to continue...
Initializing. Please wait...

Select 1 to create new instance

CONFIGURATION TOOL - CREATING A NEW INSTANCE


Enter the name of the new instance: sourcedb
Enter the server port number [10901]:
Enter the auto-discovery port number or type 'DISABLE' [DISABLE]:

Staging Store Disk Quota is used to limit the disk space used by IBM InfoSphere Change Data Capture staging Store. If this space is exhausted, this instance may run at a lower speed. The minimum value allowed is 1 GB.

Enter the Staging Store Disk Quota for this instance (GB) [100]: 10
Enter the Maximum Memory Allowed for this instance (MB) [1024]:
Enter the bit version (32/64) [64]:
Select a DB2 Instance

1. db2inst1
2. Other...

Select a DB2 Instance: 1
Select a database name

1. test
2. Other...

Select a database name: 1
Would you like to configure advanced parameters (y/n) [n]:
Enter the username: db2inst1
Enter the password:
Retrieving schema list...
Metadata schema:

1. ADMINISTRATOR
2. DB2INST1
3. NULLID
4. SQLJ
5. SYSCAT
6. SYSFUN
7. SYSIBM
8. SYSIBMADM
9. SYSIBMINTERNAL
10. SYSIBMTS
11. SYSPROC
12. SYSPUBLIC
13. SYSSTAT
14. SYSTOOLS


Press ENTER to continue...
15. Other...

Select a database schema for metadata tables: 2
Enter the refresh loader path: /opt/IBM/CDC/Loader
Note : Please ensure The Refresh Loader Path directory is created and the user  have read and write permission for the directory.

Creating a new instance. Please wait...


Instance sourcedb was successfully created.

Would you like to START instance db2inst1 now (y/n)?y


Starting instance sourcedb. Please wait...

Instance sourcedb started successfully. Press ENTER to go to the Main menu...



Now the CDC instance for the source database is created and started



To launch configuration tool by command.
Change to the folder
 /opt/IBM/CDC/Engine/bin

 run the below command

 #./dmconfigurets


Initializing. Please wait...


MAIN MENU


1. List Current Instances
2. Add an Instance
3. Edit an Instance
4. Delete an Instance
5. Consolidate Instances

6. Exit

Enter your selection: 1


LIST OF CURRENT INSTANCES
-------------------------

Name      Server Port Database      Schema      Status
--------- ----------- ------------- ----------- ------------
sourcedb  10901       test          DB2INST1    started



to start the CDC instance in 32 bit through command


[root@test bin]# ./dmts32 -I sourcedb
IBM InfoSphere Change Data Capture is running.


to start in 64 bit


[root@test bin]# ./dmts64 -I sourcedb
IBM InfoSphere Change Data Capture is running.


to stop IBM Change Data Capture:

./dmshutdown -I sourcedb



Follow the above steps for the target server where target database is installed. Target database may be in the same server or any different server.  i.e.  Install, Configure CDC  and create CDC instance for the target database.

Start CDC instance 

Now assume that CDC instance is running in both servers.


[root@test bin]# ./dmts64 -I targetdb
IBM InfoSphere Change Data Capture is running.



Example

Source Instance : sourcedb

Destination Instance : targetdb




To make communications between Management Console and replication engine processes, IBM CDC  Access servcer needs to be installed. It can be installed in the same or different machine. Default port to connecte to access server is 10901.  The port can be changed during installation time.

To Install Access Server:

1. Copy necessary setup files to any folder in the server where you want to install access server

2. Change to the folder where installation binary file is located

3. Make the installation binary file executable and start installation

       #./<installation_file>



Create an  user so that access server can be connected from Management console.

To create an Admin user

./dmcreateuser admin admin admin password ADMIN TRUE FALSE TRUE


To start the access server:

[root@test# cd /opt/IBM/CDC/AccessServer/bin
[root@accesssvr bin]# ./dmaccessserver



Now install, Management console in your windows machine. This is a gui based tool to create and manage subscriptions. The same task can also be done in Accessserver with commands. But it is always easy to manage subscriptions using Management console

Once management console is installed, open the Management Console, create subscriptions and start mirroring.

In the next tutorial, we will see how to create and manage subscriptions for data replication.

Reference: IBM Change Data Capture Guide