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MBCook 14 hours ago

That’s llama, which didn’t scale nearly as well in the tests. Assumedly because it’s not optimized yet.

RDMA is always going to have lower overhead than Ethernet isn’t it?

Neywiny 14 hours ago | parent [-]

Possibly RDMA over thunderbolt. But for RoCE (RDMA over converged Ethernet) obviously not because it's sitting on top of Ethernet. Now that could still have a higher throughput when you factor in CPU time to run custom protocols that smart NICs could just DMA instead, but the overhead is still definitively higher

_zoltan_ 3 hours ago | parent [-]

what do you think "ethernet's overhead" is?

Neywiny 3 hours ago | parent [-]

Header and FCS, interpacket gap, and preamble. What do you think "Ethernet overhead" is?

_zoltan_ 17 minutes ago | parent [-]

I've meant in usec, sorry if that wasn't clear, given that the discussion that I've replied was about rpc latency.