The two systems are in different buildings on campus. Each system (with 140) drives is a single unit, with 60-drive JBODs running on SAS-external connections.

The two systems are in different buildings on campus. Each system (with 140) drives is a single unit, with 60-drive JBODs running on SAS-external connections. If you want to span a pool across multiple regions, you'll want a distributed file system on top of your ZFS to manage that. Something like Lustre or Ceph. It would still be very challenging, though.