CloudFest 2026: Data center expansion in Europe

“The Sustainability of Everything” was the theme of this year’s CloudFest in Europa-Park, Germany. That theme was not simply a reminder to think green. It was also a call to action to extract more value from every watt, every square meter and every component in the infrastructure stack. 

This is imperative for the industry, because the demand for digital transformation and the supply of available resources are increasingly at odds. 

On the demand side are AI and data sovereignty: 

• Across Europe, AI has become a priority for sparking growth and innovation. For instance, the European Commission aims to triple data center capacity in Europe over the next five to seven years.  
• AI investment is already growing faster in Europe than in China and North America. 
• Driving expansion are AI workloads and the soaring volume of data they generate, use and need to retrieve from storage. 
• Mandates for data sovereignty, or keeping data under local control, are also accelerating the buildout of new facilities.  

On the supply side are real-world constraints:  

• Data centers devour energy. Throughout the world, they currently consume about one-third as much power as all of Europe. That amount is expected to more than double by 2030. 
• Electricity — typically the highest operating cost in data centers — is expensive in Europe. And the congested grid is already a bottleneck for new projects. 
• Consider, too, that new data centers are often 10 times larger than existing ones. 
• Regulations and strict sustainability standards tend to limit new sites to locations with abundant water for cooling and access to renewable energy.

For decades, the industry defaulted to building bigger — more racks, more halls and more mega-watt campuses. Today, progress depends on rethinking the fundamentals rather than expanding the footprint. 

One overlooked lever is areal density. In simple terms, it refers to the amount of data stored on the surface of each disk within the hard drive. 

It’s a rather technical concept with practical implications. Higher density means more data per drive — say, 44 terabytes (TB) rather than 30TB. That means fewer drives per deployment, which reduces power draw, cooling requirements, physical footprint and total infrastructure cost. 

At the exabyte scale of many cloud and enterprise data centers, these advantages add up. Higher density platforms can cut the power requirements of a deployment by nearly half, while reducing cooling demand and the number of racks required. 

In a world of strained grids and mandatory sustainability targets, greater density isn’t just an engineering milestone. It’s an essential lever for efficient expansion. 

Learn more about optimizing data center efficiency here.