Name: The 50 GB revelation: How a simple statistic redefined how we see data at Decathlon
Start: 2026-05-27T09:00:00+0200
End: 2026-05-27T09:45:00+0200

The 50 GB revelation: How a simple statistic redefined how we see data at Decathlon

FULL

Wednesday May 27, 2026 09:00 - 09:45 CEST

🤖 DATA/AI ARENA

Limited Capacity full
Adding this to your schedule will put you on the waitlist.

For years, the industry's motto has been simple: collect and store as much data as possible, believing that immense value will emerge from this accumulation. This vision, driven by tech giants like **GAFAM** that collect petabytes of data daily, isn't always practical for every company. At the same time, single computing instances on the cloud have become exponentially more powerful, allowing us to handle large amounts of data on a single machine.

This new way of thinking is captured by the **Small Data Manifesto**, which states that more data doesn't always equal better results, modern hardware is often underused, and data topics should be developed locally first. In the data department of Decathlon, we discovered this is more than just a theory. More than 90% of the data tables in our datalake (Decathlon's centralized data repository) was less than 50 GiB. This finding inspired us to define a new approach to data transformation.

After setting the context and introducing the Small Data Manifesto, we will present **Light Computing**, which brings these principles to life. Instead of spinning up expensive clusters to transform data, we use powerful single-node tools and only scale up when the data truly requires it. The leading tools of this field are **Polars** and **DuckDB**. We'll cover two main aspects: what technically defines these tools and what they bring in terms of concrete cost and architectural benefits.

The session will conclude with a live demonstration of Polars, showing how we can easily compute 50 GB of data on a small computing instance on Databricks.

Speakers

Arnaud Vennin

Data Engineer, Decathlon

Raised on the eastern plateaus of Rouen in the northwest of France, I studied primarily in my hometown, where I completed my undergraduate degree in Environmental Sciences. I spent one semester abroad in Nijmegen, a city in the Netherlands. Afterward, I obtained a master's degree... Read More →

Wednesday May 27, 2026 09:00 - 09:45 CEST
🤖 DATA/AI ARENA 135 Rue Sadi Carnot, Ronchin, France

Data / AI, Conference

Audience Intermediate

Attendees (60)

View All →

Success you have shared X tickets.

Dev Summit 2026

Arnaud Vennin

Attendees (60)

Waitlist (16)

Get help with the event

Success you have shared X tickets.

Dev Summit 2026

Arnaud Vennin

Attendees (60)

Waitlist (16)

Sign up or log in to save this to your schedule, view media, leave feedback and see who's attending!

Get help with the event