There are various arguments for using Google DNS (8.8.8.8 or 8.8.4.4) or Open DNS servers or not. A few are listed here:
- How can I choose between using my ISP’s DNS, or Google’s 8.8.8.8? – Server Fault
- Why using Google DNS / OpenDNS is a bad idea – APC
It basically comes down to two things:
- DNS speed
- CDN speed (Contend Delivery Network providers like CloudFlare, Akamai, etc)
If your DNS server isn’t close to you, it might select a CDN server that is far from you. If you rely on CDN, then you need to weight in that factor.
This is how I decide:
- devices not needing CDN: use Google DNS or Open DNS
- devices needing CDN: use Namebench to pick fast DNS servers that are nearby based on Namebench reports with “Recommended configuration (fastest + nearest)”
–jeroen
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