[SEJeff]

And DDN would still not be enough. DDN would be paired with something such as Lustre or IBM's GPFS to run the storage for big iron such as this.

[vonmoltke]

I understand that, because those are basically the only filesystems anyone could use for this application. The comment was aimed at the "various hodgepodges of their servers ... with JBOD or cheesy RAID for the disks themselves" part.