Automated scaling of applications in virtual data centers

摘要

A system and method for autoscaling a multi-tier application 302, that has components executing on a plurality of tiers 306, 308, 310 of a virtual data center 102. Resources 314 are allocated to each of the plurality of tiers based on cost and performance. An application performance is determined, and a new application performance is estimated based at least partially on an application reservation and an application limit. An optimized utility of the application is calculated based on the cost to execute the application, the application reservation, and the application limit. A scaling factor for each tier is then determined to scale up or down a number of virtual machines 312 operating in each of the tiers.