[Chicago-talk] Speakers needed

[Doug Bell]

Personally, I'd love to hear about it, but I really like hearing about
everything and anything. Even when I already think I know a lot about
a topic, there's always something else to learn and someone else's
perspective on a topic can be just as enlightening.

Doug Bell
madcityzen at gmail.com

On Jan 31, 2013, at 1:07 PM, Sean Blanton <sblanton at choppertrading.com> wrote:

> Thanks, but no, I wasn't going to talk about anything specific about the trading industry. In fact, just using multicast as an alternative to signals and tcp sockets in program to program communication. Given that a good fraction of the perl mongers are in the trading industry, maybe that's not a very good topic - you were the only +ish vote.
>
> I spoke not too long ago, so I don't have a lot of new stuff - trying to fill the void.
>
> -----Original Message-----
> From: Chicago-talk [mailto:chicago-talk-bounces+sblanton=choppertrading.com at pm.org] On Behalf Of John Kristoff
> Sent: Thursday, January 31, 2013 11:50 AM
> To: Chicago.pm chatter
> Subject: Re: [Chicago-talk] Speakers needed
>
> On Wed, Jan 30, 2013 at 12:34:37PM +0000, Sean Blanton wrote:
>> I can talk about multicast and pad it with related trivia
>> (IO::Socket::Multicast, Net::Pcap, Net::Frame::Layer, network
>> protocols - stuff like that). Multicast is a great tool and I think
>> more people would use it if they knew about it.
>
> Hi Sean,
>
> This would be an interesting topic and I'd tried to attend if I could
> (my first ever).
>
> However, having done lots of IP multicast over the years at both
> depaul.edu, northwestern.edu and cooperation with the global Internet
> multicast-enabled community, I'm going to rain on your parade a bit.
> Inter-domain multicast has never gained much traction outside a few
> niche areas even after years and years of a few dedicated people trying,
> yours truly included, and I doubt it ever will.
>
> Judging by your email address, I suspect you may have it deployed within
> an organization, where high-volume "hoot-n-holler" and ticker apps can
> readily take advantage of it.  Northwestern has made significant use of
> it internally for cable TV to dorms where it was too expensive to
> rewire.  A number of networks have also used it for PC imaging (e.g.
> Norton Ghost).
>
> These are good use cases, but wide deployment of Internet multicast
> appears to be largely dead and possibly rightfully so.  Part of the
> reason is the fundamental change in how the network has to setup and
> maintain forwarding to groups.  It is almost completely upside down from
> traditional unicast-based routing.  If you've never operated networks
> before, believe me I could go on an on about how non-trivial this is
> from a protocol perspective, a vendor equipment perspective, a network
> operator support perspective and a security perspective.
>
> Nonetheless, I too have found Net::Pcap as well as related modules such
> as NetPacket, Net::Packet, Net::DNS, Net::SSLeay and the various generic
> Socket modules both helpful and useful for lots of work.  I'm certain I
> could pick up some good information from you talk, so please do it, even
> if I'm not so encouraged by IP multicast these days.  In fact, I'm
> downright disgruntled with the injuries to prove it.  :-)
>
> Joh
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