This post is a little light on details. They mention they're not using DNS to distribute the requests, but use a single IP instead - how is that possible?
Also, they boast that it cost only 10$ - for how long was this thing running?
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They were running it for a good 7.5 minutes. I would say that $10 does sound a lot cheaper for the amount of resources utilized (200 n1-standard-1’s).I think it basically stems from the fact that GCE charges compute resources (analogous to an EC2) per 10 minutes instead of an hour (as EC2 does).
anycast. If you announce the same IP from multiple networks your request will be routed to the nearest one automatically.
It is how Google is also able to provide Google DNS on just two IP addresses while having tens if not hundreds of physical locations those requests get routed to.
This is different. What they mentioned is a load balancer, like F5,netscaler etc. HaProxy is a software based load balancer, but their does lot more.