On Mon, Jun 15, 2015 at 1:50 PM, Joe Hamelin <joe@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 ................ herrin@dirtside.com bill@herrin.us Owner, Dirtside Systems ......... Web: <http://www.dirtside.com/>