[OpenAFS-devel] Rx over TCP to solve some NAT & Firewall issues?

[Derrick J Brashear]

On Thu, 20 Nov 2003, chas williams wrote:

> >How involved is the current RX in the raw IO performance gap (AFS vs. NFS,
> >FTP et. all) people bring up?
>
> i believe rx is the problem but more precisely how rx is used the
> problem.  we (nrl) had some work done to put atm into afs.  rx datagrams
> were sent directly over an atm vc.  atm pdu's are more like udp than
> tcp but that's probably not were the gains were seen.  the 'segment'
> size for rx was increased.  this created a 'new' type of jumbogram
> that wasnt a bunch of little rx datagrams packaged together (like 'regular'
> jumbograms).  regular jumbograms are typically handled via scatter/gather
> which (IMHO) isnt well implemented on many operating systems.

i could certainly buy this being an "easy" upgrade to get some more
performance out of afs, but i don't necessarily buy it being the ultimate
answer.