We used BeeGFS since it was called FhGFS on a cluster of 32 nodes for a total capacity ranging from 256tb-1Pb. BeeGFS is very easy to configure and maintain, outperforming Lustre for every task we threw it at. In fact, we never transitioned lustre into production. Lustre was often slower than plain NFS for the cases where all storage could be mounted by a single node(!).

Unfortunately, it's prior licensing scheme prevented larger initial adoption. A good chunk of large scale setups I've seen have adopted Ceph, but I cannot comment on performance.