Fast, scalable parallel file system performance is a key enabler of massively parallel computing as well as of emerging big data and machine learning applications. Released almost two decades ago, Lustre has long been the storage solution of choice for many supercomputing data centers. But as the world slowly retire rotational disks in favor of fast SSDs and persistent memory for their performance tiers, Lustre is becoming increasingly unable to fully utilize available storage bandwidth due to its old, disk-oriented object storage server designs based on Ext4 derived ldiskfs.