On Wed, Jul 05, 2000, Randy Bush wrote:
Given a small, globally routable netblock to be used for front-end web servers, and a strong aversion for using DNS for any type of load balancing, would it be reasonable to build two identical servers farms with the same public IP addresses and rely on the BGP sessions with the hosing providers to remove one advertisement in the event of a problem? I've been looking at ways to ensure that the webservers are always available, short of building a network connecting hosting facilities.
Dude, saying things like that on this group is likely to get you executed. Building a discontigious AS isn't the answer.
i missed the part where he said discontiguous as. please point it out to us.
[quote] Given a small, globally routable netblock to be used for front-end web servers, and a strong aversion for using DNS for any type of load balancing, would it be reasonable to build two identical servers farms with the same public IP addresses and rely on the BGP sessions with the hosing providers to remove one advertisement in the event of a problem? I've been looking at ways to ensure that the webservers are always available, short of building a network connecting hosting facilities. [end quote] Note hosting(sic) providers .. providers being plural. There are multiple options. I wouldn't count doing discontinuous AS stuff as being a good solution. Stuff like the Cisco Distributed Director works, but I'm of the opinion that the server shouldn't ever decide whats best for the clients from a network point of view. Being evil and out of whack, the only solution thats going to work for this and various other distributed service requirements is finding a way to push the server selection *out* towards the clients. Modelling the internet to try and return the 'best choice' for a client is a good idea, but you aren't solving anything. (Unless of course your concept of 'telling the client' is so wide spread you affect the internets traffic patterns from your decisions .. :-) Adrian -- Adrian Chadd Build a man a fire, and he's warm for the <adrian@creative.net.au> rest of the evening. Set a man on fire and he's warm for the rest of his life.