multiValueAnswer

Multivalue answer resource record sets only: To route traffic approximately randomly to multiple resources, such as web servers, create one multivalue answer record for each resource and specify true for MultiValueAnswer. Note the following:

• If you associate a health check with a multivalue answer resource record set, Amazon Route 53 responds to DNS queries with the corresponding IP address only when the health check is healthy.

• If you don't associate a health check with a multivalue answer record, Route 53 always considers the record to be healthy.

• Route 53 responds to DNS queries with up to eight healthy records; if you have eight or fewer healthy records, Route 53 responds to all DNS queries with all the healthy records.

• If you have more than eight healthy records, Route 53 responds to different DNS resolvers with different combinations of healthy records.

• When all records are unhealthy, Route 53 responds to DNS queries with up to eight unhealthy records.

• If a resource becomes unavailable after a resolver caches a response, client software typically tries another of the IP addresses in the response.

You can't create multivalue answer alias records.