[Bloat] Random idea in reaction to all the discussion of TCPflavours - timestamps?

Rick Jones rick.jones2 at hp.com
Wed Mar 16 19:50:08 EDT 2011


> > Furthermore, I learned that a couple of 10G switch vendors are planning to 
> > have up to 4 GB of buffer RAM in their next generation of switches. So we 
> > are not talking about thousands of packets in the buffer, but of millions of 
> > packets (think of up to 400ms buffering if only a single 10G egress port is 
> > being loaded in such a switch). Compared to the base RTT of a 10G network (a 
> > few tens of microseconds, some vendors go even below a microsecond), this is 
> > even more extreme than the home router / DSLAM scenario...
> > 
> 
> The stuff for the future involves getting to the designers and getting
> them to understand the situation they're putting the rest of the net in
> while they play their pissing games with marketing (is there any other
> reason for 4 GB of buffer in any switch?), etc. That and getting the
> basic research done, measurement facilities in place, and long-term
> methodologies to really fix the problem "forever".

4GB shared across N ports no?  And 10GBASE-ER can go 40 km.  Where might
pause and FCoE wedge into this?

rick jones




More information about the Bloat mailing list