[trampoCFD]

Hi
1/ Does anyone know when the 2016 xeon 2U processors will become available?
2/ Does anyone know when the Intel Omni-Path Fabric will become available?
3/I read an article a while ago where Mellanox said they had a clear technological lead over Intel. I wondering if that's possible technically to have an advantage over Intel because they already do the interconnect between processors. Is there such a huge gap in the technology required to get 8 processors working together on the same motherboard and 5000 in a cluster?
4/Is it still possible with the latest infiniband technology to have a direct connect between two infiniband cards i.e; with no switch?
5/Is direct connect possible with Omni-Path?

Thanks
Guillaume with trampoCFD

[bindesboll]

Originally Posted by trampoCFD

4/Is it still possible with the latest infiniband technology to have a direct connect between two infiniband cards i.e; with no switch?

Two years ago it was.
My cluster is 2 nodes of Dual Xeon E5-2667 v2, connected directly using Infiniband and no switch.
I dont know if any changes to Infiniband has occured during the last two years.

Best regards
Kim Bindesbøll

[ACmate]

And does you cluster scale well on small simulation, around the 2M cells mark?

I noticed in my previous company that the direct connect was probably nowhere near as good as it should have been. I wonder if direct connect increases the latency somehow.

[bindesboll]

See this post:
http://www.cfd-online.com/Forums/har...l#post452000#8

Later scaling tests I have done, see attached picture.

[ACmate]

Hi Kim, thanks for that, so the infiniband models were run with direct connect : just a card in each node, with an infiniband cable and no switch, correct?

[bindesboll]

Yes, correct: Only 2 nodes and Infiniband card in each and no switch. Of cause you can only do this with 2 nodes.