Replacing Amazon Redshift with Apache Spark for Event Data Modeling
Blog post from Snowplow
In response to the limitations of Amazon Redshift for large-scale data transformation, particularly in handling real-time processing and complex transformations, Snowplow transitioned to using Apache Spark. Redshift, while efficient for OLAP-style queries, encountered performance bottlenecks and lacked flexibility for mutable data and custom logic. Apache Spark, a distributed computing engine, provided a scalable solution with its ability to handle large-scale transformations, support for Python, Scala, and SQL, and seamless integration with cloud storage like S3. The transition involved redefining data models, loading raw data in Spark, performing transformations, and writing results to storage solutions such as S3, Snowflake, or BigQuery. Running Spark jobs on Amazon EMR was recommended for scale, with tips for migration including starting small, using version control, and monitoring performance. The shift to Spark enabled more expressive logic, improved performance, and reduced operational complexity, facilitating faster iterations and deeper insights from Snowplow's event data.