Lustre is a massively parallel filesystem designed for high-performance, large-scale data.
Lustre is mature and open source (GPLv2), running stably in production at many thousands of sites around the world. For a number of years, over 70% of the top 100 fastest supercomputers have relied on Lustre for their storage needs.
If you need lots of data fast and reliably, value being able to use any vendor’s block storage and want to become part of a world-wide open community, then Lustre is a good choice.