Isn't this 'HSE' conceptually a HSM? How does it compares to existing field-proven 'storage engines', some of them shock-full of features (because they are fil

Isn't this 'HSE' conceptually a HSM? How does it compares to existing field-proven 'storage engines', some of them shock-full of features (because they are filesystems), such as Lustre or ZFS? https://en.wikipedia.org/wiki/Hierarchical_storage_management https://en.wikipedia.org/wiki/Hierarchical_storage_managemen... https://en.wikipedia.org/wiki/ZFS#Caching_mechanisms:_ARC,_L2ARC,_Transaction_groups,_ZIL,_SLOG,_Special_VDEV https://en.wikipedia.org/wiki/ZFS#Caching_mechanisms:_ARC,_L...