top500.org, which maintains the list of the 500 fatest supercomputers in the world also has more details on this [1]
The PathForward program [...] address the four key challenges: parallelism, memory and storage, reliability and energy consumption
Energy consumption is becoming a very important challenge, as the article says, current petascale supercomputers consume "enough power to run a small town". Major efforts will need to be made to have Exascale supercomputers that don't consume the equivalent of 10^3 small towns.
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top500.org, which maintains the list of the 500 fatest supercomputers in the world also has more details on this [1]
Energy consumption is becoming a very important challenge, as the article says, current petascale supercomputers consume "enough power to run a small town". Major efforts will need to be made to have Exascale supercomputers that don't consume the equivalent of 10^3 small towns.
[1] https://www.top500.org/news/doe-shells-out-258-million-to-si...