@thegibson IBM cash registers of old used a version of Token Ring called Store Loop. I was replacing an IBM cash register base on Black Friday and instead of unplugging it from the IBM data connector on the wall (which would self-short to prevent opening the loop) I unplugged it from the back of the register.
Every cash register in the store immediately stopped. Hard.
All the cashiers went "Hey, did your register stop?" I said "Yes, not sure what happened." as I hastily plugged it back in.
@gedvondur You might be interested in the story in this post:
@gedvondur The problem in this case was that the comms system couldn't handle the traffic being put in the front end. So somehow either the processing capacity needed to be increased -- which wasn't possible -- or the input needed to be reduced. Slowing it gently across the entire store worked well and was implemented elegantly.
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