3 ms·

Can anybody familiar with these old war stories point us to a human-readable writeup of them?

oldmanjay 11y ago
The impression I got from the article is sort of the reaction to not understanding some facet of social justice. It's apparently your job to educate yourself.
ArkyBeagle 11y ago
It's a big firehose, but McDsyan-Spohn "ATM Theory and Applications" (ISBN-13: 978-0070453463) from 1998 covers the general principles extremely well. There have obviously been entire technologies that came and went since, but the first few chapters do a remarkable job of drawing up all the evolutionary pressures. Since it's so old, it's also pretty cheap.
madsushi 11y ago
Both relate to flow control and trying to deliver a lossless network medium. Regarding B2B credits / Fibre Channel and the hop-by-hop windows in X.25, the idea is that each hop has a counter of how many packets it will send to the next hop without receiving an acknowledgement, which are "credits". Once you're out of credits, that hop stops sending traffic. X.25 was superceded/replaced by TCP/IP (which uses end-to-end acknowledgements, instead of hop-by-hop) due to increased performance. But B2B is used with Fibre Channel (storage) networks, which require lossless performance on each hop. Regarding PAUSE frames and Ctrl-S/Ctrl-Q, the idea is that as a device's receive buffer fills up (it is receiving data faster than it can remove it from the buffer), it will hit its 'pause threshold', and it will send a PAUSE message to the sender to let it know that it can't handle any more data. This is similar to Ctrl-S/Ctrl-Q, which are XOFF/XON control commands in flow control, to stop and start traffic as you ran out of buffer space.
- angersock 11y ago
  Thank you for being the only person to actually write up what the hell the author was alluding to!
- unexistance 11y ago
  thanks for the explanation, it's a rare skillset to be able to explain technical stuff on sort-of layman term :)

The impression I got from the article is sort of the reaction to not understanding some facet of social justice. It's apparently your job to educate yourself.

ArkyBeagle 11y ago

It's a big firehose, but McDsyan-Spohn "ATM Theory and Applications" (ISBN-13: 978-0070453463) from 1998 covers the general principles extremely well. There have obviously been entire technologies that came and went since, but the first few chapters do a remarkable job of drawing up all the evolutionary pressures. Since it's so old, it's also pretty cheap.

madsushi 11y ago

Both relate to flow control and trying to deliver a lossless network medium. Regarding B2B credits / Fibre Channel and the hop-by-hop windows in X.25, the idea is that each hop has a counter of how many packets it will send to the next hop without receiving an acknowledgement, which are "credits". Once you're out of credits, that hop stops sending traffic. X.25 was superceded/replaced by TCP/IP (which uses end-to-end acknowledgements, instead of hop-by-hop) due to increased performance. But B2B is used with Fibre Channel (storage) networks, which require lossless performance on each hop. Regarding PAUSE frames and Ctrl-S/Ctrl-Q, the idea is that as a device's receive buffer fills up (it is receiving data faster than it can remove it from the buffer), it will hit its 'pause threshold', and it will send a PAUSE message to the sender to let it know that it can't handle any more data. This is similar to Ctrl-S/Ctrl-Q, which are XOFF/XON control commands in flow control, to stop and start traffic as you ran out of buffer space.

angersock 11y ago
Thank you for being the only person to actually write up what the hell the author was alluding to!
unexistance 11y ago
thanks for the explanation, it's a rare skillset to be able to explain technical stuff on sort-of layman term :)