Abstract: Techniques are provided for assigning application instances to different machines. Resource usage of a particular resource by multiple application instances over a period of time is determined. Two or more application instances may be assigned to the same machine if the combined resource usage of the application instances does not exceed the resource capacity of the machine. One or more different types of resources may be considered for machine assignment, such as CPU, memory, network I/O, and disk I/O.

Abstract: Techniques for reassigning client devices to different POP centers are provided. Client devices execute code that causes the client devices to request data from one or more POP centers. The client device record how much time it takes to receive the requested data. The download time is reported and aggregated to determine POP center-to-client device assignments. If it is determined that a client device should be reassigned to a particular POP center, then a DNS provider is configured to update the appropriate hostname-to-IP address mapping to an IP address of the particular POP center. A change in performance based on a POP reassignment may then be determined.