Cray, AMD to Extend DOE’s Exascale Frontier

Re:Cray, AMD to Extend DOE’s Exascale Frontier by kincl on Tuesday May 07, 2019 @11:48AM (#19850594)

As has been noted in other comments, we do not have a power station at ORNL. We buy power from TVA at about 5.5 cents per kW hour which in part is because of the locality of the lab to TVA power plants.

TVA recently completed a 210 MW substation on ORNL's campus to better serve our needs. We do not need to coordinate with them for large runs on the machines.

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Re:Cray, AMD to Extend DOE’s Exascale Frontier by C1sc0cat on Tuesday May 07, 2019 @12:29PM (#19850987)

Nice :-) Back in the day in the UK the RAE royal aircraft establishment twinwoods had a direct line to a local power station for their wind tunnels and used to control the speed form the power staion

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Re:Cray, AMD to Extend DOE’s Exascale Frontier by W-Stool on Tuesday May 07, 2019 @03:59PM (#19852921)

With that much gear and those kind of loads do you still have a traditional UPS / transfer switch / genset arrangement for everything in the room? If not, how do you manage short duration power outages?

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Re:Cray, AMD to Extend DOE’s Exascale Frontier by kincl on Tuesday May 07, 2019 @11:38PM (#19855671)

Yep, we have battery-backed generators for UPS and a transfer switch at the 480-V feed that comes into the room but it is not enough to power the compute nodes. The UPS allows cluster management nodes and the parallel filesystem (which is a small cluster by itself) to ride through full outages and other PQE.

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Re:Cray, AMD to Extend DOE’s Exascale Frontier by toomuchtodo on Tuesday May 07, 2019 @11:51AM (#19850618)

Thanks for taking the time to provide context in thread!

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