Data streaming meets the lakehouse - Apache Iceberg™ for unified real-time and batch analytics

Kai Wahner, Global Field CTO @ Confluent

Modern enterprises need both the speed of streaming and the depth of lakehouse analytics. Apache Iceberg™ bridges these worlds with an open table format that supports ACID transactions, schema evolution, and vendor-neutral access from engines like Kafka, Flink, Apache Spark™, and Trino. This session explores how combining data streaming with Iceberg-powered lakehouses enables a “Shift Left” approach—governing data at the source, storing it once, and making it instantly reusable for real-time or batch workloads.

Key Takeaways:

  • Why Apache Iceberg™ is the open standard for unifying streaming and lakehouse data
  • How to turn real-time streams into governed, reusable lakehouse tables
  • Patterns to cut duplication and reduce Reverse ETL costs
  • Practical ways to improve data quality and governance with minimal overhead
  • Steps to future-proof architectures with open formats and multi-engine access
Where & when?

Open Source Data Summit 2025 was held on November 13th, 2025.

What is the cost of access to the live virtual sessions?

OSDS is always free and open to all.

What is Open Source Data Summit?

OSDS is a peer-to-peer gathering of data industry professionals, experts, and enthusiasts to explore the dynamic landscape of open source data tools and storage.

The central theme of OSDS revolves around the advantages of open source data products and their pivotal role in modern data ecosystems.

OSDS is the annual peer hub for knowledge exchange, fostering a deeper understanding of open source options and their role in shaping the data-driven future.

Who attends OSDS?

OSDS is attended by data engineers, data architects, developers, DevOps practitioners and managers, and data leadership.

Anyone looking for enriched perspectives on open source data tools and practical insights to navigate the evolving data landscape should attend this event.

Example topics for Open Source Data Summit:
  • Benefits of open source data tools
  • Cost/performance trade-offs
  • Building data storage solutions
  • Challenges surrounding open source data tool integration
  • Solutions for the cost of storing, accessing, and managing data
  • Data streams and ingestion
  • Hub-and-spoke data integration models
  • Choosing the right engine for your workload
Are you interested in speaking or sponsoring the next Open Source Data Summit?

Submit a talk proposal here or reach out to astronaut@solutionmonday.com.

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