[Beowulf] 10G networking?
hahn at mcmaster.ca
Thu Jan 22 22:36:02 PST 2015
I'd appreciate any comments about the state of 10G as a reasonable
cluster network. Have you done any recent work on 10G performance?
shows some excellent evidence-based work on kernel paths, but it
seems focused on bulk/saturation, rather than single-packet latency.
(not that 10G MPI wouldn't be saturated in a lot of cases vs FDR!)
I also read some comments recently about improvements that particularly
benefit certain Intel adapters - anyone have comments on Intel vs
Broadcom (vs Mellanox, I suppose).
It seems like 10gT is on the cusp of real volume-type prices: I saw a
quote today for a major-vendor 24pt switch for something like $140/port
after educational discounts. I know 10gT is somewhat higher latency
than other PHYs - or is it worth sticking to SFP+? Any comments on
latency properties of various switches? Any nice results of recent
hardware and OpenMX?
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