[MUD-Dev] How to support 1000+ simultaneous connections, and some philosophy.

Dominic J. Eidson sauron at the-infinite.org
Thu Mar 11 14:26:57 New Zealand Daylight Time 1999


On Thu, 11 Mar 1999, Chris Gray wrote:

> [Oliver Jowett:]
>  >What about using round-robin DNS (multiple A records for the same
>  >hostname)? It's using the same port, just on different IPs that all happen
>  >to be on the same machine.
> 
> I'll let others answer that - my knowledge of networking is mostly as
> a programmer, and not as an administrator/configurator. I'm not sure
> how easy it would be to do (not in editing files, but in practical
> matters), or whether it would yield decent balance among the 10.

Or, do as they do at the University of Copenhagen, on one of their SP
clusters (paralell computing cluster):

http://www.sp2.uni-c.dk/iss.html

[Snipped some]
   This load-balancing feature is provided by an SP2 software component
   called Interactive Session Support (ISS). The ISS continually monitors
   the CPU-load on the SP2 nodes that are dedicated to interactive work.
   ISS dynamically modifies the DNS nameserver configuration file (once
   every few seconds) for the SP2 computer system's domain (sp2.uni-c.dk)
   in such a way that the DNS name any.sp2.uni-c.dk always corresponds to
   the IP-address of the least loaded node. The official name for the
   SP2, JENSEN.uni-c.dk, is an alias for any.sp2.uni-c.dk. ...

For more information, the main page is at http://www.sp2.uni-c.dk/

--
Dominic J. Eidson
                                         "Baruk Khazad! Khazad ai-menu!" - Gimli
--------------------------------------------------------------------------------
 http://www.kdi.com/~sauron/                       http://www.the-infinite.org/



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