Description

Weighted resource record sets only: Among resource record sets that have the same combination of DNS name and type, a value that determines the proportion of DNS queries that Amazon Route 53 responds to using the current resource record set. Amazon Route 53 calculates the sum of the weights for the resource record sets that have the same combination of DNS name and type. Amazon Route 53 then responds to queries based on the ratio of a resource's weight to the total. Note the following:

You must specify a value for the Weight element for every weighted resource

record set.

You can only specify one ResourceRecord per weighted resource record set.

You cannot create latency, failover, or geolocation resource record sets

that have the same values for the Name and Type elements as weighted resource record sets.

You can create a maximum of 100 weighted resource record sets that have

the same values for the Name and Type elements.

For weighted (but not weighted alias) resource record sets, if you set

Weight to 0 for a resource record set, Amazon Route 53 never responds to queries with the applicable value for that resource record set. However, if you set Weight to 0 for all resource record sets that have the same combination of DNS name and type, traffic is routed to all resources with equal probability.

The effect of setting Weight to 0 is different when you associate health checks with weighted resource record sets. For more information, see Options for Configuring Amazon Route 53 Active-Active and Active-Passive Failover (http://docs.aws.amazon.com/Route53/latest/DeveloperGuide/dns-failover-configuring-options.html) in the Amazon Route 53 Developer Guide.