16 ms·
Right, I think 1% PER is around the worst case in terms of having lots of errors while not causing the data rate to scale back dramatically in common internet-f
by cperciva 11y ago
Right, I think 1% PER is around the worst case in terms of having lots of errors while not causing the data rate to scale back dramatically in common internet-facing applications. I was estimating around one undetected error per minute; as you say, not something to ignore, but definitely not as bad as the author suggested either.
- jsnell 11y agoActually, I don't think that's the case. While it's true that the theoretical maximum speed of an individual connection would decrease rapidly as packet loss increases, the aggregate data rate of the traffic going through a single network element would not necessarily be affected all that much. It's totally routine to see much higher network wide packet loss rates higher than 1%. The most I can remember was >15% sustained for weeks, for a few Gbps of real life traffic in a mobile network. ("Real life" as in hundreds of thousands of normal users, with the traffic coming directly from whatever servers they were actually accessing).
- cperciva 11y agoRight, mobile networks are unusual. My point about "common internet-facing appliances" is that most systems maintain cwnd values of at least 10 segments, or else people notice and complain about poor performance.