Okay article. I wish it had gone a bit in depth about the challenges though. What’s prohibiting deployment and running of large scale distributed systems in Ex

Okay article. I wish it had gone a bit in depth about the challenges though. What’s prohibiting deployment and running of large scale distributed systems in Exascale scenarios that is not present in Petascale? My understanding is that power/heat issues can be managed (see: Cloud vendors). Are there any software/PL challenges?