44One anycast prefix announced from six sites. What does that buy you, and what breaks at 3am?▼mediumNewCloudflareAmazon & AWSGoogle◆ premiumAnycast turns BGP convergence into your failover mechanism. Sessions stick to the site they landed on, monitoring must go per-site, and a route you cannot withdraw cleanly is worse than DNS.Open full answer →
51Design how traffic reaches three regions and how it leaves one that is failing. Last time the failover took nineteen minutes.▼hardNewCloudflareNetflixAmazon & AWS◆ premiumDNS time-to-live is a suggestion and nineteen minutes is what believing it costs. The mechanism you choose decides your failover time, and the health check you choose decides whether it fires at all.Open full answer →
