How does NewRelic's `Availability monitoring` monitor CDN's website?

StackOverflow https://stackoverflow.com/questions/22305102

Question

I have a domain that is hosted by a CDN(Akamai). This means depending on visitor's geographic region this domain will resolve into different IPs closest to the user.

NewRelic service can monitor a domain/website for availability from its "pinger" agents in multiple locations around the world.

How do those agents handle geo-distributed domains? Does each agent resolve the domain on its own? Or does some central agent resolves the domain and all other agents access the same IP?

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Solution

Each regional pinger performs its own lookup using a local resolver.

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