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Bringing Continuous Delivery to Big Data Applications

YOW! Data 2019

In this presentation I will talk about our experience at SEEK implementing Continuous- Integration & Delivery (CI/CD) in two of our Big Data applications.

I will talk about the Data Lake project and its use of micro-services to break down data ingestion and validation tasks, and how it enables us to deploy changes to production more frequently. Data enters SEEK’s data lake through a variety of sources, including AWS S3, Kinesis and SNS. We use a number of loosely coupled serverless microservices and Spark jobs to implement a multi-layer data ingestion and validation pipeline. Using the microservices architecture enables us to develop, test and deploy the components of the pipeline independently and while the pipeline is operating.

We use Test-Driven Development to define the behaviour of micro-services and verify that they transform the data correctly. Our deployment pipeline is triggered on each code check-in and deploys a component once its tests pass. The data processing pipeline is idempotent so if there is a bug or integration problem in a component we can fix it by replaying the affected data batches through the component.

In the last part of the talk, I’ll dive deeper into some of the challenges we solved to implement a CI/CD pipeline for our Spark applications written in Scala.