Tachyon Nexus, a big data spin-out of University of California Berkeley’s data unit AmpLab, has raised $7.5m in its series A from venture firm Andreessen Horowitz.

The US-based company is commercialising an open-source project, also known as Tachyon, developed at AmpLab. Tachyon is developing a memory-centric storage system that’s faster and more robust than other file-based storage systems, and has had a number of corporate contributors, including tech firms Yahoo and Intel.

At present, Tachyon’s software is operating under stealth,…