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Re: Instant chats and central servers
From: Dave Israel <davei () biohazard demon digex net>
Date: Tue, 8 May 2001 15:40:25 -0400


  There's a bunch of machines for AIM, spread out across the
AOLosphere... there is no one server that will take down the service.
(That's for the Oscar stuff; the TOC stuff, which the open messengers
use, is also clustered in the back end, but there is that One Server
You Must Talk To(tm).)

  I imagine the other services are similar.


On 5/8/2001 at 11:35:27 -0700, Sean Donelan said:

A question (and a test to see if I'm still subscribed)

The various instant messenging services, such as AIM, ICQ, Microsoft,
Yahoo, other Messenger uses a central server to manage "presence".

No central server appears to mean no instant messages, am I correct?

What does this have to do with NANOG, apparently it is becoming more
common for backbone NOC folks to communicate with their friends in
other NOCs via one of these instant chat programs.  I didn't realize
how common it was until I was informed about it last month when AOL/AIM
had difficulties.  This month Yahoo Messenger had power difficulties,
which disrupted their central servers.

If folks are using this these services for real-time communications,
should we be trying to improve their reliability?  Or is this just a
"feature" of how presence services work.

Dave Israel
Senior Manager, IP Backbone
Intermedia Business Internet

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