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> Because of this, IP level failovers are the way to go wherever possible. Routing is designed to handle this sort of thing in the best possible way. But you c
by mort96 4y ago
> Because of this, IP level failovers are the way to go wherever possible. Routing is designed to handle this sort of thing in the best possible way.
But you can't just suddenly make one IP address refers to another datacenter with another ISP in another country, can you?
- Serow225 4y agovia the magic of Anycast :)
- throwaway09223 4y agoYou sure can. There are many details and caveats and it takes a lot more infrastructure and technical sophistication. Many small sites don't control their own routing at all, for example. DNS is very simple, easy, and mostly good enough. And DNS failover is now well-enough known that we can mostly expect clients to accept fault if they don't engineer to expect it.
- silisili 4y agoYes, with BGP and anycast. What you can't do with the above is more fine grain load balancing. If your LAX node is getting overloaded, you can use a combination of geo and DNS to start splitting some amount of traffic away.