Geographically separated load balancers?

[Purcocks, Graham]

Or even give them 2 URL's and say if one is down try the other. For the
number of times its used these days its acceptable. You can even manage
who uses which URL as well then. Load balancing by brain power :) With
almost auto-failover.

-----Original Message-----
From: lvs-users-bounces at LinuxVirtualServer.org
[mailto:lvs-users-bounces at LinuxVirtualServer.org] On Behalf Of Malcolm
Sent: 21 November 2006 13:42
To: LinuxVirtualServer.org users mailing list.
Subject: Re: Geographically separated load balancers?

Joseph Mack NA3T wrote:
>
> How a client in Ireland gets sent to a server in England while someone

> on the east coast of USA gets a server in NewYork I don't know. The 
> machine name is the same in both cases. Anyone know how this is
handled?
>
>

You either use:

a) Server side re-direct
b) DNS based geographic load balancing
c) BGP
d) Combination of BGP & Geographic DNS

UltraDNS.com do a managed service for this at about $400 per month per 
DNS entry which is one of the best ways of doing it.

Obviously as with all these things the real question is WHY?

Why on earth would you want to do this with just two servers?
Just put both IP's in the DNS A record and let the client figure out 
which one is working.

Just my 2 cents...

Regards,
Malcolm.




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