34 ms·

Also 80% utilization seems just ridiculously high to me but maybe at goog volume it’s doable

• klysm 4y ago
  I remember seeing a cloudflare post about AWS bandwidth pricing where they estimated something like 20% utilization? I don’t remember where though but I think they can approximate pretty well.
• jeffbee 4y ago
  Google regularly runs these at 100%. According to the B4 paper: """These features allow many B4 links to run at near 100% utilization and all links to average 70% utilization over long time periods, corresponding to 2-3x efficiency improvements relative to standard practice"""
  • fomine3 4y ago
    How they increase efficiency by using it at 100%? They would stop some lines at night?
    • dilyevsky 4y ago
      Haven’t read the paper yet but guessing just start egressing from random pops on the way when the pipes are full
• throw0101a 4y ago
  Well, you wouldn't want to hit 80% on Day 1, as you would have no room for growth. Perhaps 50% and after a few years† you'll hit 80% and start planning for a new cable. † The video said this started five years ago, so there appears to be a lot of lead time that is needed.