On Mon, Jun 15, 2015 at 1:50 PM, Joe Hamelin <j...@nethead.com> wrote: > My solution will be to place a load balancer in a hosting site > (virtual, of course) and have it provide HA. But what about HA for the > LB? At first glance anycasting would seem to be a great idea but there is > a problem of broken sessions when routes change. > > Have any of you seen something like this work in the wild?
Anycast + TCP = much pain, for reasons which should be obvious. It's on the near side of impossible, but the far side of impractical. You'd spend a lot of money with some high-price software developers getting it to work. > I have a mail system where there are two MX hosts, one in the US and one in > Europe. Both have a DNS MX record metric of 10 so a bastardized > round-robin takes place. This does not work so well when one site goes > down. Not sure why you'd have problems with this since it's a primary operating mode that SMTP was explicitly designed for. Can you elaborate on the kinds of trouble you've experienced? Regards, Bill Herrin -- William Herrin ................ her...@dirtside.com b...@herrin.us Owner, Dirtside Systems ......... Web: <http://www.dirtside.com/>
