3 ms·
Good questions. I have no answers but only this guideline… Reality is generally more constrained than the models people make for theorems. That can help or hur
by jws 14y ago
Good questions. I have no answers but only this guideline…
Reality is generally more constrained than the models people make for theorems. That can help or hurt.
Back in the days when ethernet meant unswitched 10mbps and it was proven that you couldn't get more than about 1mbps utilization and should probably go with token ring or one of the better thought out networks… my name was on a paper showing 9mbps utilization in our real application without doing anything special. Except we were using real world hardware that was not even close to capable of sending back to back packets, so the our data streams were naturally interleaving and collisions went to near zero.
- aidenn0 14y agoThat's a case of reality being less constrained than the theory, assuming the theory actually proved a maximum utilization of ~1mbps; perhaps they were assuming all nodes were saturating the line?
- jws 14y agoIts been a while. The best I recall, the model the theory used was for a random distribution of legal interpacket timings that didn't account for the rather significant minimum interpacket gap imposed by the hardware. It was also significant here because people forgot all the preconditions of the original paper and just applied the sound bite synopsis.