3 ms·
So, can high 10GE cards actually make use of the lower latency? Another comment says that 350ns is the current best and this is faster... but how much slop is
by patrickg_zill 12y ago
So, can high 10GE cards actually make use of the lower latency? Another comment says that 350ns is the current best and this is faster... but how much slop is there in the 10GE standard? What I mean is, if the latency is less than the standard timing allows, it may not offer a practical benefit.
- deadgrey19 12y agoTiming in 10GE is sub-nano second. The PCS (physical encoding sublayer) runs at about 11Ghz (<0.1ns), so I think there's still a long way to go.
- KaiserPro 12y agoyou can also pipe 10gige over inifniband, which is pretty cheap. Has that advantage of having quicker rdma than 10gig ethernet. so while the switching may be slower, the processing is faster because data is piped directly into memory. http://www.mellanox.com/page/performance_infiniband http://www.mellanox.com/page/performance_infiniband
- deadgrey19 12y agoEthernet now also supports RDMA via the RoCE standard. No idea how it compares to Inifiband RDMA, but it has been heavily exploited in this project from Microsoft Research: https://www.usenix.org/system/files/conference/nsdi14/nsdi14-paper-dragojevic.pdf https://www.usenix.org/system/files/conference/nsdi14/nsdi14...
- justincormack 12y agoPlus they mention it in their opencompute nodes so it must be shipping https://gigaom.com/2014/10/30/microsoft-tweaks-its-server-specs-as-part-of-open-compute-project/ https://gigaom.com/2014/10/30/microsoft-tweaks-its-server-sp...