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> adding another ~10kB to each request, just to save a once-a-day call to
>Keystone (ie uuid tokens) seems to be a really high price to pay for not
>much benefit.

I have the same concern with respect to Marconi. I feel like KPI tokens
are fine for control plane APIs, but don’t work so well for high-volume
data APIs where every KB counts.

Just my $0.02...

--Kurt