Re: Adding SCTP support

If people want to work on discussing and standardising SCTP support then
I can quickly create a discussion group somewhere and invite Randall et al
into it.

I think its a worthwhile goal to sort out but I haven't had any luck
doing it on public mailing lists.

Send me a private email if you'd like to actively participate and I'll
see about facilitating some discussion.

Adrian

On Mon, Jun 02, 2008, Pranav Desai wrote:
> On Mon, Jun 2, 2008 at 11:42 PM, Mark Nottingham <mnot_at_yahoo-inc.com> wrote:
> > The use case that I (and many others, I think) am interested in is where
> > you're doing
> >
> > client <---TCP---> proxy <----SCTP---> proxy <---TCP---> origin server
> >
>
> Hmm, thats interesting. I didn't think of it this way. I was looking
> more towards the wireless networks (phones, PDAs, etc.). A custom
> browser and SCTP may not be very acceptable or feasible at first on
> these devices, because of lack of SCTP support in mobile platforms,
> but with more and more mobile platforms moving towards linux, I think
> an SCTP enabled webkit based browser might be feasible. Anyway, I was
> thinking of a use case like this.
>
> client <--------- SCTP -----------> proxy <------------ TCP ------------> OS
> lossy/slow n/w fast backends
>
> Although, the use case you presented seems more feasible at this time.
>
> > Assuming that the TCP hops are short, and the SCTP is a long haul (e.g.,
> > from Australia to the US).
> >
> >
> > On 03/06/2008, at 4:35 PM, Pranav Desai wrote:
> >
> >>
> >>
> >> On Sun, Jun 1, 2008 at 5:32 PM, Mark Nottingham <mnot_at_yahoo-inc.com>
> >> wrote:
> >> I'm very interested in this, and would be willing to help with the spec
> >> work side of things. It's also been discussed on the HTTP mailing list
> >> <http://lists.w3.org/Archives/Public/ietf-http-wg/>.
> >>
> >> Cheers,
> >>
> >> Thanks you all for your responses. So as I expected its not as trivial as
> >> changing the protocol type in squid.
> >>
> >> From the paper mentioned in this thread by Matt, it looks like we need to
> >> have a mechanism to be able to handle multiple streams in parallel, without
> >> which the advantage of using SCTP wouldn't be that much. I believe that
> >> would be difficult in squid, due to the single process nature? What would be
> >> the right way to go about achieving this ?
> >>
> >> But, in general, it seems like a proxy would be a perfect place to use
> >> something like SCTP, especially where the origin server may not have SCTP
> >> support. It also seems like the client (browser) would be critical in how
> >> efficiently they can use the key features of SCTP, multi-streaming. So a
> >> combination of a custom browser (modified firefox) and squid could have some
> >> good advantage over TCP.
> >>
> >> -- Pranav
> >>
> >>
> >>
> >>
> >> On 01/06/2008, at 12:50 PM, Adrian Chadd wrote:
> >>
> >> Hi,
> >>
> >> I've spoken to some SCTP related people about this before.
> >> The trouble is:
> >>
> >> * NOone's fleshed out how HTTP over SCTP should look;
> >> * Noone's fleshed out how servers should choose HTTP over TCP vs SCTP.
> >>
> >> They're the much more pressing questions.
> >>
> >>
> >>
> >> Adrian
> >>
> >> On Sat, May 31, 2008, Pranav Desai wrote:
> >> Hello All,
> >>
> >> What would you suggest should be the way to include SCTP support in Squid
> >> 3.0 ?
> >>
> >> My assumption here is that SCTP would be useful for clients (which
> >> support SCTP) connecting using slow/lossy wireless type networks. My
> >> goal is to experiment and compare the performance against TCP for
> >> wireless networks.
> >>
> >> So, I started with that and was easily able to add a config option for
> >> client-side and change the corresponding function
> >> clientHttpConnectionsOpen() to set appropriate protocol type and it
> >> worked just fine. But that would make it an SCTP only proxy.
> >>
> >> We could also open up another listening port for SCTP, so that we can
> >> have both SCTP and TCP simultaneously, where the origin server side
> >> will always be TCP.
> >>
> >> But I feel that I am missing something here. So, I would really
> >> appreciate any suggestions or comments you may have.
> >>
> >> Thanks for your time.
> >>
> >> -- Pranav
> >>
> >> --
> >> - Xenion - http://www.xenion.com.au/ - VPS Hosting - Commercial Squid
> >> Support -
> >> - $25/pm entry-level VPSes w/ capped bandwidth charges available in WA -
> >>
> >> --
> >> Mark Nottingham mnot_at_yahoo-inc.com
> >>
> >>
> >>
> >
> > --
> > Mark Nottingham mnot_at_yahoo-inc.com
> >
> >
> >

-- 
- Xenion - http://www.xenion.com.au/ - VPS Hosting - Commercial Squid Support -
- $25/pm entry-level VPSes w/ capped bandwidth charges available in WA -