Worldwide site, one CDN feels unreliable, want failover between two CDNs
Multi-CDN routes traffic across two or more CDNs for uptime, per-region performance, or cost arbitrage. For an SMB it is rarely needed, but for SaaS with customers across continents it can pay off. It introduces complexity in DNS, cache invalidation and certs.
Try this first
- 1Pin down the real goal: uptime (Cloudflare rarely fails), per-region latency (can help), or discount (rarely worth the complexity).
- 2Pick a DNS layer that supports active health checks and weighted/geo routing: NS1, Route 53, or a dedicated multi-CDN broker (Cedexis, Conviva).
- 3Keep cache invalidation consistent: one purge script hitting both CDNs at once, otherwise you get drift.
- 4Cert management: use the same apex cert at both CDNs via DNS-01 ACME, not HTTP-01, because HTTP-01 requires origin reachability via that CDN.
- 5Actively test failover paths, do not wait for a real outage. Run a monthly 'kill the primary CDN' exercise.
When to bring us in
If you suspect multi-CDN is needed and want to know whether the complexity helps your traffic, we can review before building.
See also
- Domain expires tomorrow and nobody saw the emailAn expired domain doesn't transfer instantly. There's a redemption window, but you pay extra.
- Unsure whether to enable auto-renewDisabling auto-renew only makes sense for domains you'll truly drop. For anything live, just keep it on.
- New registrar asks for auth code, can't find itEPP code or transfer code is the password to move a domain from registrar A to B.
None of the above fits?
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