Specializing in the development and maintenance of Android, iOS, and Web applications, DB2’s AI technology offers fast insights, flexible data management, and secure data movement to businesses globally through its IBM Cloud Pak for Data platform. Companies rely on DB2’s AI-powered insights and secure platform and save money with its multimodal capability, which eliminates the need for unnecessary replication and migration of data. Additionally, DB2 is convenient and will run on any cloud vendor.
An object-relational database management system, PostgreSQL is able to handle a wide range of workloads, supports multiple standards, and is cross-platform, running on numerous operating systems including Microsoft Windows, Solaris, Linux, and FreeBSD. It is highly extensible, and supports more than 12 procedural languages, Spatial data support, Gin and GIST Indexes, and more. Many web, mobile, and analytics applications use PostgreSQL as the primary data warehouse or data store.
1. First, you need to obtain the necessary credentials to connect to your IBM Db2 source. This includes the hostname, port number, database name, username, and password.
2. Once you have the credentials, open the Airbyte platform and navigate to the "Sources" tab.
3. Click on the "Add Source" button and select "IBM Db2" from the list of available sources.
4. In the "Configure IBM Db2" page, enter the hostname, port number, database name, username, and password in the corresponding fields.
5. Click on the "Test Connection" button to ensure that the credentials are correct and that Airbyte can connect to your IBM Db2 source.
6. If the connection is successful, click on the "Save" button to save the configuration.
7. You can now create a new pipeline and select the IBM Db2 source as the origin. Follow the prompts to configure the pipeline and select the destination where you want to replicate the data.
8. Once the pipeline is set up, you can run it manually or schedule it to run at specific intervals.
9. You can monitor the progress of the pipeline and view any errors or warnings in the Airbyte platform.
10. Congratulations, you have successfully connected your IBM Db2 source to Airbyte and can now replicate your data to any destination of your choice.
With Airbyte, creating data pipelines take minutes, and the data integration possibilities are endless. Airbyte supports the largest catalog of API tools, databases, and files, among other sources. Airbyte's connectors are open-source, so you can add any custom objects to the connector, or even build a new connector from scratch without any local dev environment or any data engineer within 10 minutes with the no-code connector builder.
We look forward to seeing you make use of it! We invite you to join the conversation on our community Slack Channel, or sign up for our newsletter. You should also check out other Airbyte tutorials, and Airbyte’s content hub!
IBM defines Db2 as a cloud-native database built to power low latency transactions and real-time analytics at scale. It provides a single engine for DBAs, enterprise architects, and developers to keep critical applications running, store and query anything, and power faster decision making and innovation across your organization.
On the other hand, PostgreSQL is a powerful, open source object-relational database system with over 35 years of active development that has earned it a strong reputation for reliability, feature robustness, and performance. It also ranks among the top 10 databases worldwide, and its popularity is growing rapidly.
You may wish to replicate your data from IBM Db2 to PostgreSQL. Here are a few reasons why:
- PostgreSQL is an open-source database, while Db2 is a proprietary database. Therefore, moving data to PostgreSQL may reduce costs.
- G2 claims that PostgreSQL performs better than Db2.
- Unlike Db2, PostgreSQL supports a wide range of operating systems.
- PostgreSQL supports secondary indexes without any restriction.
- You can run both your operational and analytical workloads on PostgreSQL.
- You may use Postgres as a single location to transform and join data from across the enterprise.
In this tutorial, you’ll learn how to replicate data from IBM Db2 to PostgreSQL using Airbyte. Let’s get started!
Below are some prerequisites required for the tutorial.
- IBM Db2 – You can install the executable from here or use the docker image *. In the examples presented in this tutorial, we use the docker image.
- Postgres – Download PostgreSQL to install it on your local host, or make use of a Postgres docker image.
- Open-source Airbyte – This can be locally installed using docker-compose.
* This tutorial was tested on an Apple Macintosh running X86 silicon. At the time of writing, an ARM64-compatible Db2 docker image was not available, and so this does not work on newer ARM-based Macs.
Step 1: Create a sample database table in IBM Db2
To migrate data from Db2 to Postgres, you must first create a sample table in the Db2 database. Using the Db2 docker image, you need to run the following series of commands to start the database engine and connect to it:
As discussed in the Docker Db2 Quick Start, start db2 as follows:
docker run -itd --name db2 --restart unless-stopped -e DBNAME=testdb -v /tmp/:/database -e DB2INST1_PASSWORD=MyP@$sw0rD -e LICENSE=accept -p 50000:50000 --privileged=true ibmcom/db2
Open a shell to the container:
docker exec -it db2 bash -c "su - db2inst1"
You should see a prompt similar to the following:
Use the db2 shell to connect to the testdb database:
connect to testdb
Use the CREATE TABLE command to create a new table called FLOWER:
CREATE TABLE FLOWER (NAME VARCHAR(200), COLOR VARCHAR(200), FCOUNT INT)
Use the SQL INSERT INTO command to insert records into the FLOWER table as follows:
INSERT INTO FLOWER (name, color, fcount) VALUES ('Lily', 'White', 12), ('Rose', 'Red', 1), ('Lotus', 'Pink', 8), ('Sunflower', 'Yellow', 9), ('Daisy', 'White', 10), ('Poppy', 'Red', 3), ('Narcissus', 'Yellow', 12), ('Blue Morning Glory', 'Blue', 10), ('Chamomile Vine', 'Yellow', 19), ('Scarlet', 'Red', 16)
Now that you have a populated Db2 database, you can use Airbyte to replicate your data!
Step 2: Set up IBM Db2 as an Airbyte source
After you have downloaded and followed the instructions to start Airbyte, you will be able to access the web UI through a browser on localhost:8000.
You need to click the New Source button in the sources tab and select the Db2 source, after which some configuration details will be requested. Enter the values that were specified when the Db2 container was created, as follows:
Once you enter all the details, click on the Setup Source button, which will connect to Db2 and validate your Airbyte source configuration.
Step 3: Start PostgreSQL
Next you will set up the destination and get it running before configuring Airbyte to use it. Start a container running PostgreSQL as follows:
docker run --rm --name postgres-destination -e POSTGRES_PASSWORD=password -p 3000:5432 -d postgres:13
Open a shell to the PostgreSQL container:
docker exec -it postgres-destination /bin/bash
Confirm that PostgreSQL is running using psql shell within the container:
psql -U postgres
Enter Ctrl+D to exit the psql shell.
Step 4: Setup PostgreSQL as an Airbyte destination
Now that PostgreSQL is running, you can set up PostgreSQL as an Airbyte destination. In the destination configuration, you will provide the information that allows you to connect to the destination – complete the configuration as shown below, using the values that you specified when the PostgreSQL container was started:
Step 5: Set up a Db2 to PostgreSQL connection
After setting up the source and the destination in Airbyte, you can choose to create a new connection, with the source and the destination that we have just created. You will then see a UI similar to the following:
As can be seen in the image above, Airbyte has detected that the source database has a FLOWER table. For the sync mode, we have chosen Incremental |Append and have specified FCOUNT as the cursor field.
Click on the Set Up Connection button to complete the configuration, at which point the connection is established and will start syncing data.
Once the sync is complete, you can verify if the data successfully landed in PostgreSQL. Let’s use the PostgreSQL shell (psql) to confirm as follows:
docker exec -it postgres-destination psql -U postgres
After connecting to the database, you can check all the available schemas and tables in the PostgreSQL database using the following command:
Airbyte has created a new table with the name flower. Next, you can check the data inside the flower table using the SELECT command as follows:
SELECT * FROM flower;
Which should respond with a table that looks similar to the following:
The records from the Db2 database are now available in Postgres, including some additional metadata columns created by Airbyte.
If you were to execute additional syncs by pressing the Sync now button, you would see that only new records (i.e. records that have an FCOUNT value greater than the highest FCOUNT value in records that were previously replicated), will be copied. This is because we have chosen incremental replication with FCOUNT as the cursor. This is discussed in more detail in the tutorial: Explore Airbyte’s incremental data synchronization.
This tutorial has demonstrated the following:
- Start a container running IBM Db2
- Configure an Airbyte source to replicate data from Db2.
- Start a container running PostgreSQL.
- Configure a PostgreSQL as an Airbyte destination.
- Create an Airbyte connection that syncs data from Db2 to PostgreSQL.
If you liked this tutorial, you might also consider browsing Airbyte’s blog or other tutorials. You can also participate in conversations on Airbyte's discourse, join our community Slack channel, or subscribe to our newsletter. Additionally, you may test out Airbyte Cloud if you're interested in Airbyte as a fully managed service!