[Opensim-dev] networking issues

[Dahlia Trimble]

I believe the buffer-bloat problem is more related to TCP than UDP. UDP is
probably affected as some ISPs may choose to discard UDP traffic when
excessive congestion occurs.

On Mon, Mar 28, 2011 at 11:41 AM, James Hughes <jamesh at bluewallgroup.com>wrote:

>
> Thanks Mic,
>
> I look forward to testing this. I have been chasing network issues that
> show up as wildly different performance experienced by users that are in
> the same simulator with others having similar connections and
> workstations. A couple of weeks ago I heard about something called
> bufferbloat and dark buffers in the Internet. I posted links to the
> information in IRC and would like to add it here as well ...
>
>    http://www.bufferbloat.net/projects/bloat/news
>    http://mirrors.bufferbloat.net/Talks/BellLabs01192011/
>
> I think this issue may a lot of bearing on our networking in the open
> Internet where packets in-transit are routed through devices with large
> built-in buffering. The packets are held in these devices for forwarding
> at a time that seems convenient for the device, rather than using
> congestion management and dropping the packets when needed. It is
> possible that a packet may experience this several times in-transit. As
> the packets are held in the buffers, latency is added to the circuit and
> may reach the point where we resend packets because we didn't get the
> acknowledgment in time.
>
> Hopefully this is, at least, somewhat related.
>
> Thanks,
> BlueWall
> _______________________________________________
> Opensim-dev mailing list
> Opensim-dev at lists.berlios.de
> https://lists.berlios.de/mailman/listinfo/opensim-dev
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://opensimulator.org/pipermail/opensim-dev/attachments/20110328/66750473/attachment-0001.html>