The present disclosure involves systems, software, and computer implemented methods for resource allocation and management. One example method includes tracking assignments by a dispatcher of tasks to servers in a data structure. The data structure includes at least one entry for each server, with a number of entries per server being based on a capacity of the server. Servers with greater capacity have more entries than servers with lesser capacity. An entry represents either an assignment of a task to a server or an available slot indicating an availability of a server to execute a task. A first server has a lesser capacity than a second server. The tracking of assignment of tasks to servers in the data structure results in more tasks being assigned to the second server than the first server, due to faster task completion by the second server.