Final answer:
Weighted round robin is the routing policy that can be used to distribute load over recordsets in a controlled way. It assigns a weight to each recordset based on its capacity to handle requests, ensuring a more balanced distribution of load.
Step-by-step explanation:
The routing policy that can be used to distribute load over recordsets in a controlled way is Weighted round robin. This policy assigns a weight to each recordset based on its capacity to handle requests. The higher the weight, the more requests it receives. For example, if there are two recordsets with weights of 3 and 5 respectively, the first will receive 3 requests for every 5 requests received by the second. This ensures a more balanced distribution of load.
Weighted round robin can be implemented using DNS load balancing or through a load balancer that supports this policy. It allows organizations to carefully distribute workload among servers and prevent any single server from being overloaded, thus improving performance and reliability.