Celestia's Fibre data layer sustained 3.07 Tb/s in a 120-validator benchmark

Serguey Asael Shinder02 October 2026, 17:431 min read

A test network of 120 validators pushed 3.07 terabits per second through Fibre, Celestia's high-throughput system for publishing blockchain data, according to the team, NewsBTC reports. The figure is end to end: it includes turning new data into encoded blobs, spreading and storing the pieces across the validators, gathering their signatures and posting the resulting commitments to the chain.

Celestia's network is built around data availability, the problem of publishing enough data that anyone can check the state produced by a rollup or other execution layer. As blockchains separate execution from settlement and data, the bottleneck moves to how much data the system can publish and verify. Fibre is Celestia's high-throughput system for that job.

The team estimates that the measured rate is enough raw data for nearly two billion transactions per second under its benchmark assumptions. Both Celestia and the report are explicit that this is a test designed to push Fibre to extreme throughput, not a measure of live user traffic on mainnet, and that the transactions-per-second comparison describes data capacity, not actual transaction volume.

The article lists what a controlled benchmark cannot show: latency under real conditions, adversarial behaviour, uneven hardware, geographic distribution and economic constraints. Those are what will determine how much of the measured capacity can be delivered reliably and at what cost once applications depend on it.

Why it matters

Throughput numbers in crypto are often quoted without their conditions. This one comes with them: 120 validators, a test environment, raw data rather than transactions. As a data-layer milestone it is meaningful; as a statement about what users can do today it is not, and the team does not claim it is.