Messages in this thread | | | Date | Sat, 14 Dec 2002 11:25:28 +1300 | From | Andrew McGregor <> | Subject | Re: R: Kernel bug handling TCP_RTO_MAX? |
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--On Friday, December 13, 2002 10:07:01 -0800 Nivedita Singhvi <niv@us.ibm.com> wrote:
> Andrew McGregor wrote: > >> In a closed network, why not have SOCK_STREAM map to something faster >> than TCP anyway? That is, if I connect(address matching localnet), >> SOCK_STREAM maps to (eg) SCTP. That would be a far more dramatic >> performance hack! >> >> Andrew > > Not that simple. SCTP (if that is what Matti was referring to) is > a SOCK_STREAM socket, with a protocol of IPPROTO_SCTP. I'm just > getting done implementing a testsuite against the SCTP API. > > i.e. You have to know you want an SCTP socket at the time you > open the socket. You certainly have no idea whether youre on > a closed network or not, for that matter, the app may want to talk > on multiple interfaces etc. (Most hosts will have one interface > on a public net)..
Things are never that simple. But I was basically talking about a local policy to change the (semantics of the) API in certain cases. It's probably a bad idea and would cause all kinds of breakage, but it is interesting to think about.
> > Currently, Linux SCTP doesn't yet support TCP style i.e SOCK_STREAM > sockets, we only do udp-style sockets (SOCK_SEQPACKET). We will be > putting in SOCK_STREAM support next, but understand that performance > is not something that has been addressed yet, and a performant SCTP > is still some ways away (though I'm sure Jon and Sridhar will be > working their tails off to do so ;)).
I wasn't aware of the current status. Ok, that's just where it's at.
> > But dont expect SCTP to be the surreptitious underlying layer > carrying TCP traffic, if thats an expectation that anyone has :)
That's my particular kind of crazy idea.
> > Solving this problem without application involvement is a > more limited scenario..
Indeed.
> > thanks, > Nivedita > >
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